Humidifier with structure to prevent backflow of liquid through the humidifier inlet

- ResMed Pty Ltd

A humidifier includes a base configured to retain a body of liquid therein, a top cover, and a seal disposed between the top cover and the base. At least a portion of the base is constructed of a heat conducting material. The top cover defines both an inlet and an outlet communicated with an interior of the base. The inlet is configured to receive pressurized breathable gas and the outlet is configured to deliver the pressurized breathable gas with added humidity.

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Description

Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 7,614,398. The reissue applications are (i) U.S. application Ser. No. 13/100,783, filed on May 4, 2011, (ii) U.S. application Ser. No. 13/944,960, filed on Aug. 23, 2013, (iii) application Ser. No. 15/182,919, filed Jun. 15, 2016, (iv) application Ser. No. 15/706,811, filed Sep. 18, 2017, (v) application Ser. No. 16/231,286, filed Dec. 21, 2018 (the instant application), and (vi) application Ser. No. 16/232,883, filed Dec. 26, 2018.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation reissue of Ser. No. 15/706,811 filed Sep. 18, 2017, which is a continuation reissue of Ser. No. 15/182,919 filed Jun. 15, 2016 which is a continuation reissue of Ser. No. 13/944,960 filed Aug. 23, 2013 now U.S. Pat. No. RE 46,079 which is a continuation reissue of Ser. No. 13/100,783, now U.S. Pat. No. RE 44,453, which is an application for reissue of U.S. Pat. No. 7,614,398 filed as Ser. No. 11/181,807 filed Jul. 15, 2005 which is a continuation of Ser. No. 10/467,382, filed 7 Aug. 2003, now U.S. Pat. No. 6,935,337, which is the US U.S. national phase of international application PCT/AU02/00155 filed 14 Feb. 2002, which designated the United States, and claims the benefit of Australia Application Nos. PR3117, filed Feb. 16, 2001, and PR 7288, filed Aug. 27, 2001, each of which is incorporated herein by reference in its entirety.

The present application claims priority to Australian Provisional Applications PR3117, filed on Feb. 16, 2001 and PR7288, filed on Aug. 27, 2001, the specifications and drawings of which are incorporated by reference in their entireties.

The present invention relates to a humidifier for use with an apparatus for supplying breathable gas such as those used for Non-invasive Positive Pressure Ventilation (NIPPV) or Continuous Positive Airway Pressure (CPAP).

An apparatus for NIPPV or CPAP typically comprises a blower whose output is connected to a patient interface, such as a mask, via an air delivery conduit. Some patients find NIPPV or CPAP more comfortable when provided with humidified air. To this end, manufacturers often supply humidifiers which may be attached in the air circuit between the blower outlet and the patient interface. Humidifiers typically include a water reservoir and are configured such that ambient air from the blower entering the humidifier collects moisture through contact with the water, before continuing on to the patient interface.

Typically, the blower and humidifier are separate components connected via a flexible conduit. An air delivery conduit connects the humidifier outlet to a patient interface mask. Alternatively, the blower and humidifier may be rigidly-connected together. Air from the blower outlet passes into the humidifier inlet where it is humidified and then passes to the air delivery conduit. A potential problem with either arrangement is that if the humidifier is tilted relative to its normal orientation, water may run or spill from the humidifier into the blower outlet which may damage the electrical circuits of the blower and potentially cause infection control problems.

It is one aspect of the present invention to substantially overcome or at least ameliorate the prior art disadvantages.

It is another aspect to provide a humidifier for a CPAP apparatus that is adapted to substantially prevent liquid contained thereto from undesirably exiting an inlet of the humidifier.

It is another aspect to provide a humidifier that is capable of directly connecting to a CPAP apparatus.

It is another aspect to provide a humidifier that has an inlet that is directly connectable with a CPAP apparatus to effectively eliminate a supply tube.

It is another aspect to provide a humidifier that is capable of heating the liquid contained therein.

One embodiment of the present invention includes an apparatus for humidifying breathable gas including a humidifier body configured to retain a body of liquid therein, an inlet communicated with an interior of the humidifier body and connectable to a blower outlet, and an outlet communicated with the interior of the humidifier body and connectable to a patient supply conduit. The interior of the humidifier is arranged such that liquid from the body of liquid is prevented from exiting the humidifier body through the inlet thereof when the humidifier body is rotated from a working, upright orientation.

In this manner, the liquid is substantially prevented from entering the blower outlet and possibly damaging the blower.

It is contemplated that the apparatus may also include a first chamber having an inlet and an outlet, the first chamber inlet preferably being connectable to a blower outlet, a second chamber having an inlet preferably connected to the first chamber outlet, and an outlet preferably connectable to the patient supply conduit, the second chamber preferably having the carrying capacity for the body of liquid. The first chamber inlet and outlet and volumes of the first and second chambers may be adapted such that, when the humidifier is disposed in the working upright orientation, the body of liquid is contained in the second chamber and, in other relative positions of the humidifier, the body of liquid is retained in at least one of the second chamber and the first and second chambers at a level therewithin below a level of the first chamber inlet.

A volume of the second chamber may be larger than a volume of the first chamber.

The first chamber may be located substantially above the second chamber in the working upright orientation of the apparatus.

The first chamber inlet and outlet may be located adjacent opposing sections of the first chamber.

The second chamber outlet may be located closer to the first chamber outlet than the first chamber inlet.

At least a portion of a base of the second chamber may be made of a heat conducting material.

The heat conductive portion may be in the form of a metallic cap which covers an opening of the base.

The apparatus may also include a top cover, a base, and a divider disposed between the top cover and base, wherein the base defines a receptacle formed therewithin, which preferably retains the body of liquid in the working orientation of the apparatus.

The top cover and the divider together may define the first chamber and the receptacle and the divider together form the second chamber.

The first chamber inlet and the second chamber outlet may be formed in the top cover and is the first chamber outlet and the second chamber inlet may be formed in the divider, the first chamber outlet and the second chamber inlet may be defined by a single aperture in the divider which communicates the first and second chambers.

The divider may define first and second sections, the first section together with the top cover preferably defining the first chamber.

The divider may include a plurality of apertures, separated by ribs, which may provide fluid communication from the second chamber to the second chamber outlet formed in the top cover.

The top cover and the base may be formed from a relatively rigid polymer material and the divider may be formed from a relatively resilient material.

The first chamber inlet may be connected to a blower outlet, the first chamber outlet may be connected to the second chamber inlet, the second chamber outlet may be connected to the patient supply conduit, and a portion of the second chamber below and behind the second chamber inlet may define a volume thereof greater than a volume of the body of liquid.

A portion of the second chamber between the first chamber inlet and the second chamber inlet and below the second chamber inlet may define a volume thereof greater than the volume of the body of liquid.

Portions of the first chamber and second chamber between the first chamber inlet and the second chamber outlet may define a volume thereof greater than the volume of the body of liquid.

Another embodiment of the present invention includes a CPAP apparatus including an apparatus for humidifying breathable gas as described above.

Another embodiment of the present invention includes a humidifier for a CPAP apparatus having a humidifier body defining a fluid reservoir and a fluid passage therein. The humidifier body has first and second chambers with a dividing member therebetween. The dividing member includes an orifice therethrough to communicate the first and second chambers with one another. Air from a blower (not shown) arrives in the first chamber via a first chamber inlet and departs from the second chamber via a second chamber outlet. The fluid passage includes the inlet, outlet, the orifice, and, at least, portions of the first and second chambers. The humidifier is designed to carry a body of liquid having a maximum volume, Vmax. In a working orientation of the humidifier, the liquid body lies in a bottom portion of the second chamber. With respect to the working orientation of the humidifier the orifice lies forward of and to the side of the inlet. The first and second chambers are configured such that a volume of a first portion of the second chamber, which lies directly beneath the fist chamber, is greater than Vmax. Additionally, the volume of a second portion of the second chamber, which is disposed to the side of the first chamber, is greater than Vmax. Furthermore, the volume of a portion of the second chamber forward of the inlet plus a portion of the first chamber forward of the inlet is greater than Vmax. Additionally, the volume of a portion of the second chamber to the side of the inlet plus a portion of the first chamber to the side of the inlet is greater than Vmax.

Yet another embodiment of the present invention includes a humidifier for a CPAP apparatus having first and second chambers, wherein an inlet to the humidifier is communicated with the first chamber, an outlet from the humidifier is communicated with the second chamber, and the first and second chambers are intercommunicated via an orifice extending therebetween. The inlet and orifice are arranged relative to one another such that a level of a volume of liquid present within the humidifier is below at least one of the inlet and orifice for any orientation of the humidifier.

Although certain embodiments of the invention are illustrated and described herein as having certain features, one skilled in the art would recognize that alternative embodiments of the invention could be provided based on at least one or more features, either individually or in combination, of the illustrated and described embodiments.

The benefits of the present invention will be readily appreciated and understood from consideration of the following detailed description of embodiments of this invention, when taken with the accompanying drawings, wherein:

FIG. 1 is a schematic view of a humidifier according to one embodiment of the present invention in a working, upright orientation;

FIGS. 2-5 are schematic views of the humidifier shown in FIG. 1 in corresponding non-working, upright orientations;

FIG. 6 is a perspective view of a humidifier according to another embodiment of the present invention in a working, upright orientation;

FIG. 7. Is an exploded perspective view of the humidifier shown in FIG. 6;

FIG. 8 is a partial sectional view of the humidifier shown in FIG. 6;

FIG. 9 is schematic view of the humidifier shown in FIG. 6 showing an air flow path through the humidifier;

FIGS. 10-13 are schematic views of the humidifier shown in FIG. 6 in corresponding non-working, upright orientations;

FIG. 14 is a perspective view of a humidifier and connecting structure according to another embodiment of the present invention;

FIG. 15 is a perspective view of the connecting structure shown in FIG. 14;

FIG. 16 is a bottom plan view of the humidifier shown in FIG. 14;

FIG. 17 is a rear perspective view of the humidifier and connecting structure shown in FIG. 14;

FIG. 18 is a bottom perspective view of the connecting structure shown in FIG. 14;

FIG. 19 is a perspective view of a humidifier and heater according to another embodiment of the present invention;

FIG. 20 is a perspective view of the heater shown in FIG. 19;

FIG. 21 is a bottom view of the humidifier shown in FIG. 19;

FIG. 22 is a cross-sectional view taken along line 22-22 in FIG. 21; and

FIG. 23 is a rear perspective view of the humidifier and heater shown in FIG. 19.

FIG. 1 schematically illustrates one embodiment of the humidifier of the present invention, indicated at 10. The humidifier 10 includes a humidifier body 12 defining a fluid reservoir and fluid passage therein. Additionally, there are two chambers 14, 16 defined by the humidifier body 12 and a dividing member 18. The dividing member 18 includes an orifice 20 therethrough to communicate the chambers 14, 16 to one another. Air from a blower (not shown) arrives in the first chamber 16 via a first chamber inlet 22. Air departs from the second chamber 14 via a second chamber outlet 24. The fluid passage includes the inlet 22, outlet 24, the orifice 20, and, at least, portions of the chambers 14, 16. The humidifier 10 is designed to carry a body of liquid 26 having a maximum volume, Vmax.

In a working orientation represented in FIG. 1, the liquid body 26 lies in a bottom portion of the second chamber 14. With respect to the orientation of the humidifier 10 depicted in FIG. 1, e.g., the orifice 20 lies forward of and to the side of the first chamber inlet 22 (e.g., at a diagonally opposite end of the chamber 16). As shown, the volume of a first portion 14A of the second chamber 14, which lies directly beneath the first chamber 16, is greater than Vmax due to its relatively increased height. Additionally, the volume of a second portion 14B of the second chamber 14, which is disposed to the side of the first chamber 16, is greater than Vmax. Furthermore, the volume of a portion of the second chamber 14 forward of the inlet 22 plus a portion of the first chamber 16 forward of the inlet 22 is greater than Vmax. Additionally, the volume of a portion of the second chamber 14 to the side of the inlet 22 plus a portion of the first chamber 16 to the side of the inlet 22 is greater than Vmax. Hence, in order to minimize the volume of the humidifier 10, the first chamber inlet 22 is positioned as far to one side of the humidifier body 12 and as far rearward of the humidifier body 12 as possible.

The embodiment of the humidifier 10 shown in FIGS. 1-5 is configured to prevent liquid from the liquid body 26 from exiting through the inlet 22 thereof, such as when inadvertently rotated from an upright, normal working position (generally illustrated in FIG. 1). For this reason, it is preferable for the humidifier 10 to be capable of being rotated from the upright, working position by about 120° without allowing liquid to exit from the inlet 22. It is more preferable for the humidifier 10 to be capable of being rotated from the upright, working position by about 80°-110° without allowing liquid to exit from the inlet 22. It is contemplated that for the embodiment of the humidifier 10 shown in FIG. 1, it may be especially preferable for the humidifier 10 to be capable of being rotated from the upright, working position by about 90° without allowing liquid to exit from the inlet 22, since the humidifier 10 is readily able to be placed on one side thereof due to the substantially fiat, normal sides thereof. However, of course, it may be desirable for the humidifier 10 to be capable of being rotated more or less than 90°, depending on the particular configuration of the humidifier 10. It is noted that while the humidifier 10 is designed to prevent liquid from exiting the inlet thereof when inadvertently oriented in other than the upright working position, it may be possible to purposefully enable liquid to exit from the inlet, such as by jostling or rapidly and/or repeatedly rotating the humidifier 10. In situations wherein it is highly undesirable for liquid to exit the inlet of the humidifier, the configuration (e.g., volume) of the chambers, size and placement of the inlet and outlet, and size and placement of the aperture intercommunicating the chambers may be altered from the illustrated embodiment to decrease the possibility of liquid exiting the inlet of the humidifier.

As shown in FIG. 2, the arrangement of the chambers 14, 16, inlet 22, and outlet 24 means that, if the humidifier 10 is rotated in a clockwise direction by up to 90° about axis α, then the liquid body 26 will accumulate in the second portion 14B of the second chamber 14 and a portion of the first chamber 16 adjacent the outlet 24. In this situation, liquid of the liquid body 26 may run out of the outlet 24, but will not run out of the inlet 22 back into the blower.

Similarly, as shown in FIG. 3, if the humidifier 10 is rotated in a counter-clockwise direction (relative to the position illustrated in FIG. 1) by up to 90° about axis α, then the liquid body 26 will accumulate in the first portion 14A of the second chamber 14, but will not spill over orifice 20 into the first chamber 16.

As shown in FIG. 4, if the humidifier 10 is rotated in a clockwise direction (relative to the position illustrated in FIG. 1) up to 90° about axis β, then the liquid body 26 will accumulate in a rearward portion of the second chamber 14 but will not spill over orifice 20 into the first chamber 16.

As shown in FIG. 5, if the humidifier 10 is rotated in a counter-clockwise direction (relative to the position illustrated in FIG. 1) up to 90° about axis β, then the liquid body 26 will accumulate in forward portions of the first and second chambers 14, 16 and will not spill back through first chamber inlet 22. Furthermore, liquid of the liquid body 26 will drain out of the humidifier 10 through second chamber outlet 24.

In the embodiment illustrated in FIGS. 1-5, the humidifier 10 has an exterior shape that is generally rectangular and the humidifier 10. As illustrated, the inlet 22 is positioned to correspond to a blower outlet being on the upper left-hand side when viewed from the front in an upright position. Therefore the humidifier inlet 22 is positioned at the back of the humidifier 10 on the upper left-hand side, when viewed from the front in an upright position. The humidifier outlet 24 lies on the front upper right-hand side, when viewed from the front in an upright position. However, it is, of course, possible for the inlet and outlet to be repositioned corresponding to the position of the blower outlet.

For each of the orientations of the humidifier 10 shown in FIGS. 1-5, the level of the liquid body 26 is always below the level of at least one of the inlet 22 and orifice 20 intercommunicating the first and second chambers 16, 14. In this manner, in a case wherein the inlet 22 is disposed below the level of the liquid body 26 (such as in orientations illustrated in FIGS. 3 and 4), the orifice 20 is disposed above the level of the liquid body 26, which prevents liquid from flowing therethrough and exiting the inlet 22. Conversely, in a case wherein the orifice 20 is disposed-below the level of the liquid body 26 (such as in orientations illustrated in FIGS. 2 and 5), the inlet 22 is disposed above the level of the liquid body 26. Accordingly, liquid may flow through the orifice 20, but is prevented from exiting through the inlet 22.

FIG. 6 shows another embodiment of a humidifier 30 according to the present invention. The humidifier 30 includes an inlet 32 and an outlet 34, both of which are communicated with an interior of the humidifier 30. The interior of the humidifier 30 defines a reservoir for a body of liquid and a fluid passage. The fluid passage is communicated to each of the inlet 32 and outlet 34 and is configured such that fluid (e.g., breathable gas at an elevated pressure) flowing therethrough is exposed to the body of liquid. Additionally, the humidifier 30 is adapted for detachable connection to an NIPPV or CPAP apparatus (not shown) which includes a blower. When connected, the output of the blower is attached to the inlet 32. Air from the blower enters the inlet 32, flows through the fluid passage, and collects moisture through contact with the liquid body, before continuing on to the outlet 34 and then to the patient.

It is also contemplated that the humidifier 30 may include an additional internal passage to allow monitoring of the CPAP pressure without degrading signal strength or necessitating relatively large correction factors due to signal attenuation within the humidifier, such as described in co-pending Applications incorporated above, as well as co-pending Application No. WO 02/066107, entitled “Air Pressure Signal Monitoring in Apparatus for Treating Sleep Disordered Breathing”, filed on even date herewith and hereby incorporated by reference in its entirety.

As shown in FIG. 7, the humidifier 30 includes a top cover 36, a gasket 38, and a base 40. The gasket 38 is disposed between the top cover 36 and base 40, which are secured together via sliding clips 72. (See FIG. 6.) Of course, other suitable fastening arrangements and constructions are possible. For example, the top cover 36 and base 40 may be formed with snap-fit or other cooperating constructions. Alternatively, other types of mechanical fasteners may be utilized. It is contemplated that the top cover 36 may be formed from a relatively rigid polymer material, such as polysulfone (for example, grade UDEL P1700, manufactured by BP Amoco Polymers), and includes the inlet 32 and the outlet 34. The gasket 38 may be formed from a relatively resilient material, such as silicone rubber (for example, SILASTIC 94595-IIC, manufactured by Dow Corning) and is divided into first and second sections 42 and 44 by a channel structure 46. The first section 42 includes a raised portion 48 having a first aperture 50 extending vertically therethrough. The second section 44 includes a plurality of second apertures 52 extending vertically therethrough and being separated from one another by ribs 54. The top cover 36 may also include a divider wall structure 56 (FIG. 8) which corresponds to and is received within the channel structure 46 of the gasket 38. The gasket 38 includes a sealing flange 58 formed about a periphery thereof. The base 40 may be formed from the same or similar rigid polymer material as the top cover 36 and may include a receptacle 60 formed therewithin, a bottom portion 62, and side walls 64 extending upwardly from the bottom portion 62. The base 40 may also include a removable bridge structure 66, which divides the receptacle 60 into two sections 68 and 70, which correspond to the sections 22 42 and 24 44 of the gasket 38.

As shown in FIG. 8, to assemble the humidifier 30, the gasket 38 is attached the base 40. The flange 58 of the gasket 38 forms a sealing engagement with an upper edge portion of the side walls 64 of the base 40. The top cover 36 is then attached to the base 40 via sliding clips 72 (FIG. 6) on opposite sides of the humidifier 30, such that the top cover 36 covers and seals with the gasket 38. The removable bridge structure 66 vertically supports an intermediate portion of the gasket 38. As shown, a downwardly facing surface of the channel structure 46 of the gasket 38 engages an upwardly facing surface of the bridge structure 66. When assembled, the gasket first section 42, the top cover 36, and the divider wall structure of the top cover 36 together form a first chamber 74. The receptacle 60 of the base 40 together with the gasket 38 form a second chamber 76. The first chamber 74 is thus located above the second chamber 76 and the volume of the second chamber 76 is larger than the volume of the first chamber 74. The first and second chambers 74, 76 are in communication with one another via the first aperture 50 within the gasket 38. The second chamber 76 is in communication with the outlet 34 via the second apertures 52 within the gasket 38.

In use, a predetermined maximum volume of liquid is poured into the receptacle 60 of the base 40 after removing the top cover 36 and the sealing gasket 38 from the base 40. The top cover 36 and the sealing gasket 38 are then reattached to the base 40. As shown in FIG. 9, a body of liquid 78 is held in the second chamber 76 when the humidifier 10 is in the upright working orientation of the humidifier 30. Breathable gas from the blower enters the inlet 32 and travels through the first chamber 74 and into the first aperture 50. The gas passes through the aperture 50 and enters the second chamber 76 where it is humidified by contact with the body of liquid 78, before exiting through apertures 52 in the gasket 38, and then out through outlet 34 (FIG. 6).

In the working upright orientation of the humidifier 30, as shown in FIG. 9, a liquid level, indicated at 81, of the body of liquid 78 is below the aperture 50. Thus, liquid from the body of liquid 78 cannot exit via the inlet 32 and there is no risk of damaging the electronic components of the NIPPV or CPAP apparatus. The body of liquid 78, however, will be displaced in the humidifier 30 according to the orientation of the humidifier 30. Accordingly, the humidifier 30 is configured to substantially prevent liquid of the body of liquid 78 from exiting through the inlet 32 in non-upright orientations to avoid damage to the NIPPV or CPAP apparatus connected to the humidifier 30.

Similarly as with the embodiment illustrated in FIGS. 1-5, the embodiment of the humidifier 30 shown in FIGS. 6-13 is configured to prevent liquid from the liquid body 78 from exiting through the inlet 32 thereof, such as when inadvertently rotated from an upright normal working position (generally illustrated in FIG. 6). For this reason, it is preferable for the humidifier 30 to be capable of being rotated from the upright, working position by about 120° without allowing liquid to exit from the inlet 32. It is more preferable for the humidifier 30 to be capable of being rotated from the upright, working position by about 80°-110° without allowing liquid to exit from the inlet 32. It may be especially preferable for the humidifier 30 to be capable of being rotated from the upright, working position by about 90° without allowing liquid to exit from the inlet 32. However, of course, it may be desirable for the humidifier 30 to be capable of being rotated more or less than 90°. It is noted that while the humidifier 30 is designed to prevent liquid from exiting the inlet thereof when inadvertently oriented in other than the upright working position, it may be possible to purposefully enable liquid to exit from the inlet, such as by jostling or rapidly and/or repeatedly rotating the humidifier 30. In situations wherein it is highly undesirable for liquid to exit the inlet of the humidifier, the configuration (e.g., volume) of the chambers, size and placement of the inlet and outlet, and size and placement of the aperture intercommunicating the chambers may be altered from the illustrated embodiment to decrease the possibility of liquid exiting the inlet of the humidifier.

For each of the orientations of the humidifier 30 shown in FIGS. 10-13, the level of the liquid body 78 is always below the level of at least one of the inlet 32 and aperture 50 intercommunicating the first and second chambers 74, 76. In this manner, in a case wherein the inlet 32 is disposed below the level of the liquid body 78 (such as in orientations illustrated in FIGS. 10 and 12), the aperture 50 is disposed above the level of the liquid body 78, which prevents liquid from flowing therethrough and exiting the inlet 32. Conversely, in a case wherein the aperture 50 is disposed below the level of the liquid body 78 (such as in orientations illustrated in FIGS. 11 and 13), the inlet 32 is disposed above the level of the liquid body 78. Accordingly, liquid may flow through the aperture 50, but is prevented from exiting through the inlet 32.

In FIG. 10, the humidifier 30 is rotated to an angle about 90° from the working upright orientation, such that a side 80 thereof corresponding to the side of the humidifier 30 adjacent the inlet 32, is oriented below a side 82 thereof corresponding to the side of the humidifier 30 adjacent the outlet 34. Because the raised portion 48 of the gasket 38 increases the volume of the second chamber 76, the body of liquid 78 remains only in the second chamber 76 and the level 81 of the liquid body 78 remains below the first aperture 50. Thus, the liquid will not exit through the inlet 32.

In FIG. 11, the humidifier 30 is rotated to an angle about 90° from the working upright orientation, such that the side 82 is below the side 80 (i.e., flipped 180° from the orientation illustrated in FIG. 11). As the level 81 of the body of liquid 78 is above (at least initially) the apertures 52, liquid will pass therethrough and exit the outlet 34. However, since the level 81 of the liquid body 78 is below the inlet 32, liquid will not exit through the inlet 32. Liquid exiting through the outlet 34 is generally acceptable as there is not generally a risk in damaging the NIPPV or CPAP apparatus.

In FIG. 12, the humidifier 30 is rotated to an angle about 90° from the working upright orientation, such that a rear side thereof indicated at 84, corresponding to the side at which the inlet 32 is located, is below a forward side thereof indicated at 86, corresponding to the side at which the outlet 34 is located. As shown, the body of liquid 78 remains substantially in the second chamber 76 and the level 81 of the liquid body 78 remains below the first aperture 50. Thus, water cannot exit through the inlet 32.

FIG. 13 illustrates when the humidifier 30 is tilted to an angle about 90° from the working upright orientation, such that the forward side 86 is below the rear side 84. As shown, the body of liquid 78 is disposed within forward portions of the first and second chambers 74, 76. As the level 81 of the body of liquid 78 is at least initially above the level of the aperture 50, liquid will flow through the aperture 50 into the first chamber 74. However, since the inlet 32 is disposed above the level of the body of liquid 78 in this orientation, no liquid exits through the inlet 34.

The humidifier 30 thus ensures that the body of liquid 78 is disposed in one of (a) only the second chamber 76, or (b) portions of the first and second chambers 74, 76 at a level below the inlet 32, to prevent liquid from exiting through the inlet 32 at orientations of the humidifier 30 up to an angle of about 90° from the working upright orientation. In the illustrated embodiment, a number of features of the humidifier 30 contribute to ensuing this function. These include relive positions of the inlet 32 and first aperture 50. More particularly, the inlet 32 and first aperture 50 are located on opposing ends of the first chamber 74. Also, the volume of the second chamber 76 is larger than the volume of the first chamber 74, which is assisted by the raised portion 48 of the gasket 38 so that liquid displaced from the first chamber 74 may be accommodated within the second chamber 76 without overflow through aperture 50. Furthermore, the outlet 34 is located closer to the first aperture 50 than the inlet 32, which assists in ensuing that liquid will exit via the outlet 34, rather than though the inlet 32.

The humidifier 30 therefore substantially prevents or reduces the risk of water exiting through the inlet 32, which may damage the NIPPV or CPAP apparatus, when the humidifier 30 is in other orientations up to an angle of about 90° from its working upright orientation.

It is contemplated that the humidifier 30 may be used as a retrofit or add-on component for a CPAP apparatus. To facilitate this usage, it may be preferable to provide a connecting structure 100 that is configured to connect between the CPAP apparatus and humidifier 30. As shown in FIGS. 14 and 15, the connecting structure 100 includes a housing 102, which provides a generally horizontally extending receptacle 104 within which the humidifier 30 may be disposed. The housing 102 provides a base portion 106 that is configured to support the humidifier 310 thereon and a retaining portion 108 configured to secure the humidifier 30 in position. As shown in FIG. 16, the retaining portion 108 extends generally parallel to the base portion 106 and is spaced above the base portion 106. Referring back to FIG. 14, the humidifier 30 may be formed with a recess 110 that is open and of a complimentary shape to receive the retaining portion 108 therein.

To facilitate connection of the humidifier 30 to the connecting strut 100, it is contemplated that another embodiment of a humidifier, indicated at 120 in FIG. 16, may include a securing mechanism 122. As shown, the securing mechanism 122 includes a resiliently biased pull member 124 that includes one or more locking lugs 126 extending generally downwardly therefrom. The pull member 124 is disposed at a forward end (assuming the rearward end of the humidifier 120 is adjacent the connecting structure 100) of the humidifier 120 and is resiliently biased by a pair of resilient legs 128. Rearward portions of the legs 128 are relatively securely retained within corresponding pocket structures 130 provided on a bottom side of the humidifier 120. Ribs 132 extend is downwardly from the bottom side of the humidifier 120 and engage an intermediary portion of the legs 128 to define a space between the resilient legs 128 and the bottom side of the humidifier 120. In this manner, the pull member 124 is biased generally downwardly by the resilient legs 128, but may be manually moved (e.g., pulled) upward against a resilient bias of the legs 128.

As shown in FIG. 15, a forward portion of the base portion 106 includes generally upwardly open lug receiving recesses 134 within which the lugs 126 may be disposed when the humidifier 120 is disposed within the receptacle 104. As the humidifier 120 is inserted within receptacle 104, the legs 128 resiliently bias the legs 126 into recesses 134. The lugs 126 and recesses 134 thereby secure the humidifier 120 within the receptacle 104. To remove the humidifier 120 from the receptacle 104, the pull member 124 is pulled upwardly to withdraw the lugs 126 from the recesses 134. The humidifier 120 may then be pulled generally horizontally out of the receptacle 104.

FIG. 17 shows a rearward side of the connecting structure 100. The rearward side of the connecting structure 100 provides a retaining mechanism 140 to secure the connecting structure 100 to the CPAP apparatus. It is contemplated that the retaining mechanism 140 may include a series of apertures 142 within the rearward portion of the housing 102. The apertures 142 may receive therein, for example, prongs or tabs (not shown) provided by the CPAP apparatus. As shown in FIG. 18, within each aperture 142, a locking member 144 may be provided that is resiliently biased toward a position that partially encloses the respective aperture 142. As also shown in FIG. 18, a button structure 146 may be coupled to the locking members 144, such that manual movement of the button structure 146 moves the locking members 144 out of their biased positions to substantially fully open the apertures 142. It is contemplated that the tabs or prongs on the CPAP apparatus are provided with a groove therein such that when positioned within the apertures 142, the locking members 144 engage within respective grooves to thereby securely and detachably retain the connecting structure 100 to the CPAP apparatus.

Referring back to FIG. 17, the housing 102 of the connecting structure 100 may be provided with an opening 148 that allows the inlet of the humidifier to extend therethrough so as to be connected to the CPAP apparatus.

In certain circumstances, it may be desirable to provide heated humid air to the respirator mask. Accordingly, another embodiment of the connecting structure, indicated at 150 in is FIG. 19, may include a heater 152. The connecting structure 150 may include a housing 154, which provides a base portion 156 and retaining portion 158, similar to the housing 102 described above. As shown in FIG. 19, the retaining portion 158 may include a controller such as a knob or other selecting device 160 thereon to control a heat setting of the heater 152. It is also contemplated that the controller 160 may include a display device, such as an LCD screen.

As shown in FIG. 20, the base portion 156 may include a heating element 162 thereon. The heating element 162 may be in the form of a substantially flat plate-like resistance heater, which heat generated thereby may be directly controlled by the controller 160. As shown in FIG. 19, another embodiment of the humidifier is indicated at 170. The humidifier 170 is disposed within a receptacle 172 provided by the housing 154. It is contemplated that the humidifier 170 has the same basic construction as the humidifiers 10 and 120 described above. However, it is contemplated that the humidifier 170 may include a heating plate 174 (also referred to as a metallic cap) to facilitate heating of the liquid contained therein. In particular, an opening 176 is provided within a bottom wall 178 of the humidifier 170. The heating plate 174 is shaped to fit within the opening 176, as shown in FIG. 21. As shown in more detail in FIG. 22, the heating plate 174 includes an upstanding peripheral wall 180 which includes an outwardly extending peripheral lip 182. A resilient seal member 184 is disposed about an outer periphery of the peripheral wall 180 in contact with the peripheral lip 182. A ring-like retaining member 186 may be press-fit onto the peripheral wall 180 to retain the seal 184 in position on the peripheral wall 180. The retaining member 186 includes an outwardly extending flange structure 188. The seal 184 is disposed between the peripheral lip 182 and flange structure 188. It is contemplated that the retaining member 186 may be press fit onto the heating plate 174, as described above, or may be formed in one piece therewith. The bottom wall 178 of the humidifier 170 is formed with an annular upstanding flange 190 which receives the heating plate 174. It is contemplated that the flange 190 may be slightly tapered inwardly in the upward direction to ease insertion of the heating plate 174. As shown, the flange 190 may include a generally horizontally extending lip structure 192 that vertically retains the heating plate 174.

Referring to FIG. 19, with the humidifier 170 in position within the receptacle 172, a bottom surface of the heating plate 174 is in contact with an upper surface of the heating element 162. In this manner, a heat generated by the heating element 162 is conducively transferred to the heating plate 174. The liquid within the humidifier 170 is exposed to an upper surface of the heating plate 174 and conducts heat therefrom. It is contemplated that a temperature of the liquid within the humidifier 170 may be controlled by manipulation of the controller 160.

It is also contemplated that the heating element 162 may be upwardly resiliently biased to ensure adequate contact between the heating element 162 and the heating plate 174.

As shown in FIG. 23, a rearward portion of the connecting suture 150 may include a plurality of generally outwardly extending contact elements 194. It is contemplated that the contact element 194 may communicate with a power supply within the CPAP apparatus and/or a controller and/or sensors. In this manner, power may be delivered to the heater 152 directly from the CPAP apparatus. Additionally, a controller within the CPAP apparatus itself may control the heater 152. Furthermore, it is contemplated that sensors within the CPAP apparatus may monitor a heat output of the heater 152. Moreover, it may be possible for a CPAP apparatus to automatically adjust a heat output of the heater 152 based on a measured temperature thereof or of the water within the humidifier or of the breathable air exiting the humidifier.

Claims

1. A humidifier assembly for a CPAP apparatus, comprising

a humidifier including a base configured to retain a body of liquid therein, at least a portion of the base being constructed of a heat conducting material, a top cover, and a seal disposed between the top cover and the base; and
a connecting structure configured to connect between the CPAP apparatus and humidifier and allow communication of an outlet of the CPAP apparatus with the inlet of the humidifier, the connecting structure including a housing providing a base portion to support the humidifier thereon, and a retaining mechanism configured to secure the connecting structure to the CPAP apparatus,
wherein the base portion includes a heating element in contact with the heat conducting material of the base of the humidifier.

2. A humidifier assembly according to claim 1, wherein the top cover defines both an inlet and an outlet communicated with an interior of the base, the inlet configured to receive pressurized breathable gas and the outlet configured to deliver the pressurized breathable gas with added humidity.

3. A humidifier assembly according to claim 1, wherein the connecting structure includes a control knob to control a heat setting of the heating element.

4. A humidifier assembly according to claim 1, wherein the connecting structure includes contact elements that communicate with a power supply within the CPAP apparatus.

5. A humidifier assembly according to claim 1, wherein the connecting structure is configured to allow removable attachment of the CPAP apparatus to the humidifier.

6. A humidifier assembly according to claim 1, wherein the heat conducting material is a metallic material.

7. A CPAP apparatus including a humidifier assembly according to claim 1.

8. A respiratory therapy system for providing humidified respiratory therapy, the respiratory therapy system comprising:

a respiratory therapy device to administer respiratory therapy to a patient, the respiratory therapy device comprising: a housing; a recess defined on a side of the housing; a heating element positioned on a bottom surface of the recess; a blower unit located within the housing to generate a supply of pressurized breathable gas; an outlet positioned on a sidewall of the housing within the recess, the outlet being in fluid communication with the blower unit and providing the supply of pressurized breathable gas outside of the housing; and a control unit positioned on a top surface of the housing, the control unit including a display and a selecting device to control the respiratory therapy;
a humidification chamber configured to be positioned in the recess of the housing, to be heated by the heating element, and to add humidification to the pressurized breathable gas from the heating element by warming water contained in the humidification chamber, the humidification chamber comprising: a bottom surface constructed of a heat conductive material, wherein the bottom surface is configured to be positioned over the heating element; a wall extending from the bottom surface and defining a volume to hold the water in the humidification chamber; a top surface, the bottom surface, wall, and top surface together enclosing the volume; an inlet configured to be fluidly connected to the outlet of the respiratory therapy device, the inlet receiving the supply of pressurized breathable gas via the fluid connection with the outlet of the respiratory therapy device; an outlet configured to direct the pressurized breathable gas with added humidity towards an air delivery conduit for providing the respiratory therapy to the patient; and an obstruction within the chamber that is positioned between the bottom surface and the top surface, wherein the obstruction has a maximum horizontal dimension that is greater than a maximum vertical dimension of the obstruction, wherein the obstruction extends at least partially across an interior of the humidification chamber along a horizontal plane.

9. The humidification system of claim 8, wherein the respiratory therapy device further includes a retaining mechanism to retain the humidification chamber in the recess.

10. The humidification system of claim 9, wherein the retaining mechanism comprises a resiliently biased member that is resiliently biased and is deflected during insertion of the humidification chamber into the recess.

11. The humidification system of claim 8, further comprising a retaining mechanism to retain the humidification chamber in the recess, the retaining mechanism being positioned at a front of the respiratory therapy device when the humidification chamber is retained within the recess.

12. The humidification system of claim 11, wherein the retaining mechanism comprises a resiliently biased member that is resiliently biased in a vertical direction.

13. The humidification system of claim 12, wherein the retaining mechanism is vertically deflected during insertion of the humidification chamber into the recess and substantially returns to its resiliently biased positioned upon full insertion of the humidification chamber into the recess.

14. The humidification system of claim 8, wherein the display and the selecting device are positioned above the top surface of the humidification chamber when the humidification chamber is positioned in the recess.

15. The humidification system of claim 8, wherein the obstruction defines, at least partially, one or more fluid inlet passageways between the inlet and the water contained in the humidification chamber, the one or more fluid inlet passageways causing the pressurized breathable gas received through the inlet to be, at least partially, diverted around the obstruction before reaching the water contained in the humidification chamber for added humidification.

16. The humidification system of claim 15, wherein the one or more fluid inlet passageways are defined by the obstruction and the top surface.

17. The humidification system of claim 15, wherein the one or more fluid inlet passageways are defined by the obstruction and the wall.

18. The humidification system of claim 15, wherein the one or more fluid inlet passageways are defined by the obstruction, the top surface, and the wall.

19. The humidification system of claim 15, wherein the one or more fluid inlet passageways being at least partially offset from the inlet so as to cause the at least partial diversion of the of the pressurized breathable gas.

20. The humidification system of claim 8, wherein the obstruction further defines, at least partially, one or more fluid outlet passageways between the water contained in the humidification chamber and the outlet, the one or more fluid outlet passageways causing the pressurized breathable gas with added humidification to be, at least partially, diverted around the obstruction before being expelled through the outlet.

21. The humidification system of claim 20, wherein the one or more fluid outlet passageways are defined by the obstruction and the top surface.

22. The humidification system of claim 20, wherein the one or more fluid outlet passageways are defined by the obstruction and the wall.

23. The humidification system of claim 20, wherein the one or more fluid outlet passageways are defined by the obstruction, the top surface, and the wall.

24. The humidification system of claim 20, wherein the one or more fluid outlet passageways being at least partially offset from the outlet so as to cause the at least partial diversion of the of the pressurized breathable gas with added humidification.

25. The humidification system of claim 8, wherein the humidification chamber further includes an internal vertical wall positioned within the interior of the humidification chamber and extending at least partially below the obstruction, wherein the internal vertical wall at least partially obstructs flow of the pressurized breathable gas between the inlet and the outlet.

26. The humidification system of claim 25, wherein the internal vertical wall extends across the interior of the humidification chamber.

27. The humidification system of claim 26, wherein the internal vertical wall divides a portion of the interior of the humidification chamber below the obstruction into an inlet section and an outlet section, wherein the inlet section corresponds to the inlet and the outlet section corresponds to the outlet, the internal vertical wall at least partially obstructing the flow of the pressurized breathable gas between the inlet section and the outlet section.

28. The humidification system of claim 8, wherein the humidification chamber further includes an internal vertical wall positioned within the interior of the humidification chamber and extending at least partially above the obstruction, wherein the internal vertical wall extends across the interior of the humidification chamber.

29. The humidification system of claim 28, wherein the internal vertical wall divides a portion of the interior of the humidification chamber above the obstruction into an inlet section and an outlet section, wherein the inlet section corresponds to the inlet and the outlet section corresponds to the outlet, the internal vertical wall blocks the flow of the pressurized breathable gas from the inlet section to the outlet section causing the pressurized breathable gas to flow around the obstruction.

30. The humidification system of claim 28, wherein the internal vertical wall extends from the top surface of the humidification chamber.

31. The humidification system of claim 8, wherein the humidification chamber is sized and shaped to fit within the recess, wherein positioning the humidification chamber in the recess (i) establishes a fluid connection between the inlet and the outlet of the respiratory therapy device and (ii) positions the bottom surface of the humidification chamber over the heating element of the respiratory therapy device.

32. The humidification system of claim 31, wherein the humidification chamber is configured to be positioned in the recess by horizontally sliding the humidification chamber into the recess.

33. The humidification system of claim 8, further comprising means for removably connecting the inlet of the humidification chamber to the outlet of the respiratory therapy device.

34. The humidification system of claim 8, further comprising: the air delivery conduit, wherein the air delivery conduit is in fluid communication with the outlet of the humidification chamber for transporting the pressurized breathable gas; a patient interface connectable to the air delivery conduit to supply the pressurized breathable gas to the patient and means removably connecting the air delivery conduit to the patient interface.

35. The humidification system of claim 34, wherein the patient interface further comprises means for securing the patient interface in an operative position to the patient for delivering the respiratory therapy.

36. The humidification system of claim 8, further comprising means for adding water to the humidification chamber.

Referenced Cited
U.S. Patent Documents
485127 October 1892 Lynch
933301 September 1909 Hartman
1085833 February 1914 Wilson
1813959 July 1931 Romanoff
1974843 September 1934 Blashfield
RE19826 January 1936 Aisenstein
2220669 November 1940 Allen et al.
2780708 February 1957 Glynn et al.
2945619 July 1960 McLure et al.
3171353 March 1965 McMahan
3316910 May 1967 Davis et al.
3584401 June 1971 Cryer et al.
3612710 October 1971 Mount
3620638 November 1971 Kaye et al.
3638926 February 1972 Melville et al.
3659604 May 1972 Melville et al.
3690317 September 1972 Millman
3806102 April 1974 Valenta et al.
3864440 February 1975 Giocoechea
3954920 May 4, 1976 Heath
4037994 July 26, 1977 Bird
4051205 September 27, 1977 Grant
4152379 May 1, 1979 Suhr
4171190 October 16, 1979 Hudson
4222971 September 16, 1980 Eilert
4229142 October 21, 1980 Le Dall et al.
4237080 December 2, 1980 Eliott
4243396 January 6, 1981 Cronenberg
4336798 June 29, 1982 Beran
4383800 May 17, 1983 Becker et al.
4523896 June 18, 1985 Lhenry et al.
4532088 July 30, 1985 Miller
4576616 March 18, 1986 Mottram et al.
4588425 May 13, 1986 Usry et al.
4621632 November 11, 1986 Bartels et al.
4657713 April 14, 1987 Miller
4686354 August 11, 1987 Makin
4753758 June 28, 1988 Miller
4799287 January 24, 1989 Belanger et al.
4802819 February 7, 1989 Bevington et al.
4807616 February 28, 1989 Adahan
4838258 June 13, 1989 Dryden et al.
4906417 March 6, 1990 Gentry
4913140 April 3, 1990 Orec et al.
4921642 May 1, 1990 LaTorraca
4926856 May 22, 1990 Cambio, Jr. et al.
4941469 July 17, 1990 Adahan
4946348 August 7, 1990 Yapp
4953546 September 4, 1990 Blackmer et al.
4973234 November 27, 1990 Swenson
4993411 February 19, 1991 Callaway
5097424 March 17, 1992 Ginevri et al.
5127800 July 7, 1992 Hyll et al.
5199009 March 30, 1993 Svast
5231979 August 3, 1993 Rose et al.
5237987 August 24, 1993 Anderson et al.
5271391 December 21, 1993 Graves
5329939 July 19, 1994 Howe
5391063 February 21, 1995 Hantle et al.
5443061 August 22, 1995 Champain et al.
5445143 August 29, 1995 Sims
5474112 December 12, 1995 Carola
5482031 January 9, 1996 Lambert
5533506 July 9, 1996 Wood
5537997 July 23, 1996 Mechlenburg et al.
5558084 September 24, 1996 Daniell et al.
5564415 October 15, 1996 Dobson et al.
5577496 November 26, 1996 Blackwood et al.
5588423 December 31, 1996 Smith
5598837 February 4, 1997 Sirianne et al.
5651775 July 29, 1997 Walker et al.
5655522 August 12, 1997 Mechlenburg et al.
5673687 October 7, 1997 Dobson et al.
5794219 August 11, 1998 Brown
5822715 October 13, 1998 Worthington et al.
5828943 October 27, 1998 Brown
5832448 November 3, 1998 Brown
5848592 December 15, 1998 Sibley
5870283 February 9, 1999 Maeda et al.
5879163 March 9, 1999 Brown et al.
5887133 March 23, 1999 Brown et al.
5888053 March 30, 1999 Kobayashi et al.
5897493 April 27, 1999 Brown
5899855 May 4, 1999 Brown
5913310 June 22, 1999 Brown
5916493 June 29, 1999 Miller
5918603 July 6, 1999 Brown
5933136 August 3, 1999 Brown
5940801 August 17, 1999 Brown
5943473 August 24, 1999 Levine
5951300 September 14, 1999 Brown
5956501 September 21, 1999 Brown
5960403 September 28, 1999 Brown
5985559 November 16, 1999 Brown
5997476 December 7, 1999 Brown
D419658 January 25, 2000 Matchett et al.
6012455 January 11, 2000 Goldstein
6023686 February 8, 2000 Brown
6032119 February 29, 2000 Brown et al.
6050260 April 18, 2000 Daniell et al.
6101478 August 8, 2000 Brown
6109865 August 29, 2000 Ishikawa
6119693 September 19, 2000 Kwok et al.
6129524 October 10, 2000 Woollenweber et al.
6131571 October 17, 2000 Lampotang et al.
6135432 October 24, 2000 Hebblewhite et al.
6144837 November 7, 2000 Quy
6152132 November 28, 2000 Psaros
6158978 December 12, 2000 Norbury, Jr.
6161095 December 12, 2000 Brown
6185095 February 6, 2001 Helot et al.
6189870 February 20, 2001 Withall
6202991 March 20, 2001 Coniglio et al.
6210116 April 3, 2001 Kuczaj et al.
6213119 April 10, 2001 Brydon et al.
6216691 April 17, 2001 Kenyon et al.
6257171 July 10, 2001 Rivard
6279574 August 28, 2001 Richardson et al.
6308706 October 30, 2001 Lammers et al.
6332462 December 25, 2001 Krohn
6338473 January 15, 2002 Hebblewhite et al.
6340288 January 22, 2002 Hulkkonen et al.
6349724 February 26, 2002 Burton et al.
D454393 March 12, 2002 Lynch et al.
6374826 April 23, 2002 Gunaratnam et al.
6397841 June 4, 2002 Kenyon et al.
6398197 June 4, 2002 Dickinson
6435180 August 20, 2002 Hewson et al.
6471493 October 29, 2002 Choi et al.
D467335 December 17, 2002 Lithgow et al.
D468011 December 31, 2002 Lithgow et al.
D468017 December 31, 2002 McCombs
6514053 February 4, 2003 Takura et al.
6532961 March 18, 2003 Kwok et al.
6543449 April 8, 2003 Woodring et al.
6554260 April 29, 2003 Lipscombe et al.
6591834 July 15, 2003 Colla et al.
6604390 August 12, 2003 Nooner
6615444 September 9, 2003 McGill et al.
6622724 September 23, 2003 Truitt et al.
6672300 January 6, 2004 Grant
D487311 March 2, 2004 Lithgow et al.
6718974 April 13, 2004 Moberg
D493520 July 27, 2004 Bertinetti et al.
D493884 August 3, 2004 Virr et al.
6772999 August 10, 2004 Lipscombe et al.
6775882 August 17, 2004 Murphy et al.
D498527 November 16, 2004 Virr et al.
6827340 December 7, 2004 Austin et al.
6837260 January 4, 2005 Kuehn
6874771 April 5, 2005 Birdsell et al.
6896478 May 24, 2005 Botros et al.
6910483 June 28, 2005 Daly et al.
6918389 July 19, 2005 Seakins et al.
6935337 August 30, 2005 Virr et al.
7096864 August 29, 2006 Mayer et al.
7111624 September 26, 2006 Thudor et al.
7137388 November 21, 2006 Virr et al.
7225809 June 5, 2007 Bowen et al.
7413173 August 19, 2008 DiMatteo et al.
7614398 November 10, 2009 Virr et al.
7616871 November 10, 2009 Kramer
7677246 March 16, 2010 Kepler et al.
8091547 January 10, 2012 Thudor et al.
RE44453 August 27, 2013 Virr et al.
8550072 October 8, 2013 Thudor et al.
20010017134 August 30, 2001 Bahr
20020020930 February 21, 2002 Austin et al.
20020022973 February 21, 2002 Sun et al.
20020056453 May 16, 2002 Klopp et al.
20020159897 October 31, 2002 Kegg et al.
20030062045 April 3, 2003 Woodring et al.
20030084900 May 8, 2003 Leclerc et al.
20030115085 June 19, 2003 Satoh
20030208465 November 6, 2003 Yurko et al.
20030230308 December 18, 2003 Linden
20040035422 February 26, 2004 Truitt et al.
20040055597 March 25, 2004 Virr et al.
20040060559 April 1, 2004 Virr et al.
20050005937 January 13, 2005 Farrugia et al.
20050103339 May 19, 2005 Daly et al.
20050217673 October 6, 2005 Daly et al.
20060191531 August 31, 2006 Mayer et al.
20060237005 October 26, 2006 Virr et al.
20070036662 February 15, 2007 Pesola et al.
20070134085 June 14, 2007 Daly et al.
20090229606 September 17, 2009 Tang et al.
20100229867 September 16, 2010 Bertinetti et al.
Foreign Patent Documents
200065475 April 2001 AU
275612 January 1913 DE
3005094 August 1981 DE
3623162 January 1987 DE
3823242 February 1990 DE
9014848 February 1991 DE
4138098 May 1993 DE
4244493 July 1993 DE
3789221 August 1994 DE
9317450 September 1994 DE
9409231 November 1994 DE
19630466 May 1998 DE
69409024 October 1998 DE
29817685 May 1999 DE
29909611 September 1999 DE
19936499 February 2001 DE
10016005 December 2001 DE
102005007773 September 2005 DE
19515739 November 2007 DE
0201985 November 1986 EP
0274996 July 1988 EP
0376584 July 1990 EP
0 589 429 March 1994 EP
0589429 March 1994 EP
0845277 June 1998 EP
0893750 January 1999 EP
0903160 March 1999 EP
1023912 August 2000 EP
1 055 431 November 2000 EP
1055431 November 2000 EP
1087322 March 2001 EP
1318307 June 2003 EP
1374938 January 2004 EP
2323436 April 1977 FR
2714985 July 1995 FR
1556492 November 1979 GB
2177006 January 1987 GB
7-145795 June 1995 JP
11-398 January 1999 JP
2000-337670 December 2000 JP
2001-160102 June 2001 JP
2002-206498 July 2002 JP
2002-253672 September 2002 JP
2002-306601 October 2002 JP
503495 March 2001 NZ
WO 93/05451 March 1993 WO
WO 95/15778 June 1995 WO
WO 97/32619 September 1997 WO
WO 98/04311 February 1998 WO
WO 98/31937 July 1998 WO
WO 98/33433 August 1998 WO
WO 98/57691 December 1998 WO
WO 99/13932 March 1999 WO
WO 99/22794 May 1999 WO
WO 99/64747 December 1999 WO
WO 00/13751 March 2000 WO
WO 00/21602 April 2000 WO
WO 00/27457 May 2000 WO
WO 00/32261 June 2000 WO
WO 01/10489 February 2001 WO
WO 01/32069 May 2001 WO
WO 01/73653 October 2001 WO
WO 02/02169 January 2002 WO
WO 02/066106 August 2002 WO
WO 02/066107 August 2002 WO
WO 2007/019628 February 2007 WO
WO 2009/059359 May 2009 WO
WO 2009/156921 December 2009 WO
WO 2010/092496 August 2010 WO
Other references
  • Apex Medical Corporation, Petition Exhibit 1002 in IPR2014-00551, “ResMed's First Amended Complaint for Patent Infringement—Jury Trial Demanded”, Case No. SACV-13-00498 CJC (RNBx), USDC, Central District of California, Southern Division, 18 pages.
  • Breas Medical AB “iSleep® 20” Brochure, Dec. 2007, 2 pages.
  • Communication dated Jul. 1, 2010 in European Appln. No. 02 700 014.0 (5 pages).
  • Communication Pursuant to Article 94(3) EPC (examination report) dated Jun. 12, 2015 in Euroean Application No. 02 700 014.0 (3 pages).
  • Communication Pursuant to Article 94(3) EPC (examination report) dated Jun. 5, 2015 in European Application No. 10 189 422.8 (4 pages).
  • Communication Pursuant to Article 94(3) EPC (European Examination Report) dated Oct. 7, 2015 in EP Application No. 12 159 042.6 (4 pages).
  • Communication Pursuant to Article 94(3) EPC dated Feb. 4, 2015 in European Application No. 12 159 042.6 (4 pages).
  • Complaint for Patent Infringement—Jury Trial Demanded as filed in the United States District Court, Southern District of California, Case No. '13CV1246 MMAWMC, dated May 31, 2013, 18 pages.
  • ITC Action related to Certain Sleep-Disordered Breathing Treatment Systems and Components Thereof, Inv. No. 337-TA- , CBI 13-185, filed on Mar. 28, 2013, 57 pages.
  • ResMed's First Amended Complaint for Patent Infringement, filed in the United States District Court Central District of California Southern Division, filed on Apr. 8, 2013, 342 pages.
  • Correspondence regarding FDA 510(k) submission, exhibit 1025 in case No. IPR2016-01727 dated Aug. 6, 1997, 5 pages.
  • De Vilbiss® Healthcare, “DeVilbiss IntelliPAP® Standard CPAP System,” Nov. 2007, 2 pages.
  • Declaration of Joseph Dyro, Petition Exhibit 1007.
  • Examination Report dated Oct. 10, 2003 in New Zealand Appln. No. 527088 (2 pages).
  • Extended European Search Report dated Apr. 28, 2011 in European Appln. No. 10189422.8 (5 pages).
  • Extended European Search Report dated May 4, 2012 in European Appln. No. 12159042.6 (5 pages).
  • Final Notice of Reasons for Rejection delivered Sep. 24, 2008 in Japanese Appln. No. 2002-565664, with English translation (6 pages).
  • Fischer & Paykel, “Two Easy Steps to Comfort”, 4 pages, Aug. 1995.
  • Fisher & Paykel Healthcare “SleepStyle™ 200 CPAP Series” Specification Sheet, 1998, 4 pages.
  • Fisher & Paykel Healthcare “SleepStyle™ 200 CPAP Series” Specification Sheet, 2005, 4 pages.
  • Fisher & Paykel Healthcare “SleepStyle™ 600 CPAP Series” Specification Sheet, 2005, 4 pages.
  • Fisher & Paykel Healthcare Two Easy Steps to Comfort, Humidification and Nasal CPAP Therapy, Aug. 1995, 4 pages.
  • Fisher & Paykel Healthcare, “HC200 Series Nasal CPAP Blower & Heated Humidifier User's Manual”, 1998, 17 pages.
  • Fisher & Paykel Limited, New Zealand Application No. 503495, filed Mar. 21, 2000, 29 pages.
  • German Patient Manual for Hoffrichter/Sandmann CPAP Respirator—Perfect CPAP Therapy, 30 pages plus Translation Verification Certificate, Mar. 1998.
  • HC200 Series Nasal CPAP Blower and Heated Humidifier Fisher & Paykel Healthcare, 17 pages.
  • Hoffrichter “Vector CP AP—Therapy With Technical Mastery”, 4 pages, Oct. 1998.
  • Hoffrichter GmbH “Vector therapy in perfection” Brochure, 2002, 2 pages.
  • International Preliminary Examination Report completed Oct. 4, 2002 in International Appln. No. PCT/AU02/00155 (3 pages).
  • International Search Report dated Mar. 21, 2002 in International Appln. No. PCT/AU02/00155 (2 pages).
  • J. H. Emerson Co., Cough Assist, “Non-Invasive Removal of Bronchial Secretions,” 2 pages.
  • Madaus Schwarzer Medizintechnik, “New Approaches in Diagnosis and Therapy—Moritz biLevel User Manual”, May 1994, 38 pages.
  • Madaus Schwarzer Medizintechnik, “New Approaches in Diagnosis and Therapy-Max nCPAP User Manual”, Mar. 1994, 38 pages.
  • MAP Medizintechnik fuer Arzt and Patient “max II nCP AP moritz II biLevel—The gentle therapy for sleep-related breathing disorders” Brochure, 2000, 4 pages.
  • MAP Medizintechnik, “minni Max nCPAP®” brochure, 12 pages, Mar. 2005.
  • MAP Medizintechnik, “Moritz II biLEVEL®—The gentle therapy for sleep-related breathing disorders” brochure, 6 pages, Jan. 2001.
  • MAP Medizin-Technologie GmbH “minni Max nCP AP®, The respiratory therapy device with out an integrated humidifier”, Dec. 2003, 17 pages.
  • MAP Medizin-Technologie GmbH, Moritz®S/Moritz®ST—Sailing toward therapeutic success . . . , Jul. 2004, 4 pages.
  • Microfilm of Japanese Utility-Model Application No. S54-003858 (Japanese Utility-Model Application Publication No. S55-104925).
  • Motion to Amend the Complaint and Notice of Investigation as filed in the United States International Trade Commission, Investigation No. 337-TA-879, dated May 31, 2013, 18 pages.
  • Notification of Acceptance of Request for Invalidation and English Translation for corresponding Chinese Patent No. 02804936.5, dated Mar. 20, 2014, 188 pages.
  • Notification of Acceptance of Request for Invalidation, dated Dec. 24, 2014, in Chinese Patent No. 02804936.5, with English translation, 62 pages.
  • Notification of Reasons for Rejection dated Feb. 19, 2008 in Japanese Appln. No. 2002-565664, with English translation (5 pages).
  • Notification of Second Office Action dated Jan. 27, 2006 in Chinese Appln. No. 02804936.5, with English Translation (6 pages).
  • Notification of the First Office Action dated Jul. 22, 2005 in Chinese Appln. No. 02804936.5, with English translation (8 pages).
  • Office Action dated Jan. 22, 2008 in Japanese Patent Appln. No. 2002-565665 (w/English translation) (12 pages).
  • Patent Owner Exhibit No. 2001 in IPR2014-00551, Applicant Transmittal to USPTO re Completion of National Phase Filing of the PCT Application for the Mayer Reference, Aug. 6, 2002, 4 pages.
  • Patent Owner Exhibit No. 2002 in IPR2014-00551, Re. 44,453 Patent Application Data Sheet, Initial May 4, 2011, 5 pages.
  • Patent Owner Exhibit No. 2003 in IPR2014-00551, Decision of the Patent Trial and Appeal Board Denying Institution of Inter Partes Review of U.S. Pat. No. 7,614,398, entered Feb. 20, 2014, 5 pages.
  • Patent Owner Exhibit No. 2005 in IPR2014-00551, U.S. National Stage Worksheet of USPTO re National Phase Requirements Completion for the Mayer Reference, 1 page.
  • Patent Owner Exhibit No. 2010 in IPR2014-00551, Deposition Transcript of Dr. Joseph F. Dyro in Connection with Inter Partes Review Proceedings IPR2013-00511, IPR2013-00512, IPR2013-00514, IPR2013-00515, and IPR2013-00516, Apr. 21, 2014, 46 pages.
  • Patent Owner Exhibit No. 2011 in IPR2014-00551, Patent Owner ResMed Limited's Preliminary Response to Apex Medical Corp. 's Petition for Inter Partes Review of U.S. Pat. No. 7,614,398, Case No. IPR2013-00513, Nov. 22, 2013, 15 pages.
  • Petition Exhibit 1003 in IPR2014-01 196, REMStar® Heated Humidifier Manual, Mar. 15, 2001, 8 pages.
  • Petition Exhibit 1004 in IPR2014-01363, Declaration of Steve Bordewick, Aug. 22, 2014, 90 pages.
  • Petition Exhibit 1004 in IPR2014-01 196, Declaration of Steve Bordewick, Jul. 22, 2014, 59 pages.
  • Petition Exhibit 1006 in IPR2014-00551, Patent Owner Amendment dated Mar. 27, 2009, in U.S. Appl. No. 11/181,807, 10 pages.
  • Petition Exhibit 1006 in IPR2014-01 196, Patent Owner ResMed Limited's Preliminary Response filed Jul. 10, 2014, in IPR2014-00551, 41 pages.
  • Petition Exhibit 1007 in IPR2014-00551, Declaration of Joseph Dyro in Support of Inter Partes Review of U.S. Pat. No. Re. 44,453, executed Mar. 26, 2014, 15 pages.
  • Petition Exhibit 1007 in IPR2014-01 196, ITC Investigation No. 337-TA-890,: Order No. 7: Initial Determination Granting Complainants' Motion to Amend Complaint and Notice of investigation and Granting Respondents' Motion to Terminate the Investigation with Respect to U.S. Pat. No. 7,614,398, served Feb. 4, 2014, 8 pages.
  • Petition Exhibit 1008 in IPR2014-01 196, Case No. 13-cv-1246-CAB (WMc), Order on Motion to Stay, Motion to Dismiss, and Related Discovery Request, Oct. 15, 2013, 3 pages.
  • Petition Exhibit 1009 in IPR2014-01 196, Case No. SACV 13-00498: Order Granting Defendants' Motion to Stay Litigation Pending Inter Partes Review, Oct. 4, 2013, 3 pages.
  • Petition Exhibit 1010 in IPR2014-01 196: Patent Prosecution History of Reissue U.S. Appl. No. 13/944,960, filed Jul. 18, 2013, 228 pages.
  • Petition Exhibit 1011 in IPR2014-01 196: Patent Prosecution History of U.S. Pat. No. 7,614,398, 174 pages.
  • Petition Exhibit No. 1012 in IPR2014-01 196: Patent Prosecution History of Reissue U.S. Pat. No. Re. 44,453, 2157 pages.
  • Petition Exhibit No. 1013 in IPR2014-01 196: Proof of Service of 3B Medical, Inc. in Civil Action No. 13-cv-1246-MMA-WMC, 5 pages.
  • Petition Exhibit No. 1014 in IPR2014-01 196: Australian Application No. PR 3117, filed Feb. 16, 2001, 17 pages.
  • Petition Exhibit No. 1015 in IPR2014-01196: ITC Investigation No. 337-TA-890: Order No. 8: Construing Terms of the Asserted Patents, served Jan. 17, 2014, 51 pages.
  • Petition Exhibit No. 1016 in IPR2014-01196: ITC Investigation No. 337-TA-890: Order No. 14: Denying Respondents' Motion for Summary Determination of Invalidity of U.S. Pat. No. Re. 44,453, served Mar. 26, 2014, 19 pages.
  • Petition Exhibit No. 1020 in IPR2014-01 196: Australian Application No. PR 7288, filed Aug. 27, 2001, 23 pages.
  • Petition Exhibit No. 1022 in IPR2014-01196: ITC Investigation No. 33 7-T A-890: Notice of Commission Determination Not to Review an Initial Determination Granting the Complainants' Motion to Amend the Complaint and Notice of Investigation to Substitute U.S. Pat. No. Re. 44,453 for U.S. Pat. No. 7,614,398 and Granting Respondents' Motion to Terminate the Investigation with Respect to U.S. Pat. No. 7,614,398, Issued: Feb. 10, 2014, 3 pages.
  • Petition for Inter Partes Review of U.S. Pat. No. 7,614,398, mailed on Aug. 16, 2013.
  • Petition for Inter Parties Review of U.S. Pat. No. Re. 44,453, BMC Medical Co. Ltd., Petitioner v. ResMed Limited, Patent Owner, Case No. IPR2014-01363, Aug. 22, 2014, 66 pages.
  • Petition for Inter Parties Review of U.S. Pat. No. Re. 44,453 Under to 35 U.S.C. §§ 311 ET SEQ. and 37 C.F.R. §42.100 ET SEQ., Apex Medical Corp., Petitioner v. ResMed Limited, Patent Owner, Case No. IPR2014-00551, Mar. 27, 2014, 38 pages.
  • Petition for Inter Parties Review of U.S. Pat. No. Re. 44,453 Under to 35 U.S.C. §§311-319 and 37 C.F.R. §42.100 et seq., BMC Medical Co. Ltd., Petitioner v, ResMed Limited, Patent Owner, Case No. IPR2014-01 196, Jul. 23, 2014, 62 pages.
  • Photos of HumidAire™, 11 pages.
  • Photos of MAP Humidifier and Tub, 2 pages and cover sheet, undated.
  • Photos of tray system available before the critical date, with sample flow generator and humidifier, 5 pages.
  • ResMed “Sullivan® HumidAire® User's Instructions”, 8 pages, 1998.
  • ResMed, “The SULLIVAN® HumidAire™”, 1997, 1 page.
  • Respironics “System One Heated Humidifier User Manual”, May 2009, 20 pages.
  • SleepStyle600 CPAP Series Operating Manual, Thermo Smart, www.Manualslib.com, Fisher & Paykel Healthcare, 11 pages.
  • Stuff.co.nz, Sleeping beautifully article, exhibit 1024 in case No. IPR2016-01730 dated Dec. 17, 2013, 4 pages.
  • Sullivan HumidAire User's Instructions, exhibit 1027 in case No. IPR2016-01727, 8 pages.
  • Supplementary European Search Report dated Sep. 15, 2009 in European Appln. No. 02700014.0, (3 pages).
  • U.S. International Trade Commission, Inv. No. 337-TA-890, “Notice of the Commission's Final Determination; Issuance of a Limited Exclusion Order and Cease and Desist Orders; Termination of the Investigation,” Issued Dec. 23, 2014, 25 pages.
  • U.S. International Trade Commission, Inv. No. 337-TA-890, “Office of Unfair Import Investigations' Petition for Review of the Initial Determination,” dated Nov. 7, 2014 (Public Version Filed: Dec. 3, 2014), 5 pages.
  • U.S. International Trade Commission, Inv. No. 337-TA-890, “Office of Unfair Import Investigations' Petition for Review of the Initial Determination,” dated Sep. 11, 2014 (Public Version Filed: Oct. 8, 2014), 37 pages.
  • U.S. International Trade Commission, Inv. No. 337-TA-890, “Office of Unfair Import Investigations' Petition for Review of the Initial Determination,” dated Sep. 3, 2014 (Public Version Filed: Oct. 8, 2014), 34 pages.
  • U.S. Patent and Trademark Office, Case IPR2014-01196 and IPR2014-01363, U.S. Pat. No. Re. 44,453 E, “Scheduling Order,” Entered: Jan. 21, 2015, 9 pages.
  • U.S. Patent and Trademark Office, Case IPR2014-01196, U.S. Pat. No. Re. 44,453 E, “Decision Institution of Inter Partes Review 37 C.F.R. §42.108,” Paper No. 7, Entered: Dec. 21, 2014, 11 pages.
  • United States Patent and Trademark Office, Before the Patent Trial and Appeal Board, BMC Medical Co., Ltd., 3B Products, L.L.C. and 3B Medical Inc. (Petitioner) v. ResMed Limited (Patent Owner), Final Written Decision, Paper 25, Entered Jan. 19, 2016 in IPR2014-01196 (14 pages).
  • United States Patent and Trademark Office, Before the Patent Trial and Appeal Board, BMC Medical Co., Ltd., 3B Products, L.L.C. and 3B Medical Inc. (Petitioner) v. ResMed Limited (Patent Owner), Final Written Decision, Paper 25, Entered Jan. 20, 2016 in IPR2014-01363 (39 pages).
  • U.S. Patent and Trademark Office, Case IPR2014-01363, U.S. Pat. No. Re. 44,453 E, Decision Institution of Inter Partes Review 37 C.F.R. §42.108, Paper No. 7, Entered: Jan. 21, 2015, 21 pages.
Patent History
Patent number: RE48118
Type: Grant
Filed: Dec 21, 2018
Date of Patent: Jul 28, 2020
Assignee: ResMed Pty Ltd (Bella Vista, NSW)
Inventors: Alexander Virr (Gosford), Ian Malcolm Smith (Sydney), Perry David Lithgow (Sydney), Richard Llewelyn Jones (Hornsby Heights), Andrew Cheung (Sydney)
Primary Examiner: Joseph A Kaufman
Application Number: 16/231,286
Classifications
Current U.S. Class: Submerged Baffle (261/123)
International Classification: F23D 11/00 (20060101); A61M 15/00 (20060101); F23D 14/00 (20060101); A61M 16/16 (20060101); A61M 16/10 (20060101); A61M 16/00 (20060101);