Abstract: An elbow assembly for use in a respiratory mask, which includes an elbow, an inlet port, an exhaust port, and a baffle separating the inlet port from the exhaust port. A mask assembly includes a cushion comprising at least one gusset and an aperture for connection to the elbow assembly.

Abstract: A three-way diverter valve has a body with an input with a fitting for securing the input to the output of a flowmeter. The valve body also includes first and second outputs and a ball coupled to a control handle for rotating the ball valve to first or second positions. The ball has a passageway for supplying oxygen to either said first output or said second output. The control handle may include indicia identifying the active flow direction for the selected output.

Abstract: A device for adjusting a lid cover for an oxygen mask dispensing container. The device includes a stationary plate having a cover that is adjustable relative to the plate by means of a spring such that an outermost lid cover is capable of easily mating with the opening in the interior lining of an aircraft. The lid is spring-biased toward the plate such that when the plate is attached to the oxygen mask dispensing container body, the lid is automatically pulled into position relative to the opening in the interior lining of the aircraft.

Abstract: In a respirator mask in which the visor panels can be covered by light-absorbing supplementary panels, first and second snap-in hooks are molded onto opposite sides of the visor panel and a stop is molded onto a corner section to form a guide pocket. The outer contour lines and the convexity of the visor panel and the supplementary panel are identical. To attach the flexurally elastic supplementary panel, it is first fastened in the guide pocket and on the first snap-in hook. Then the opposite side is locked into the second snap-in hook after flexing the supplementary panel.

Abstract: A swivel exhaust conduit for rotatably connecting a patient mask to the delivery conduit of a positive pressure air supply. The swivel exhaust conduit design provides an exhaust port that utilizes the rotating bearing of the swivel conduit's rotating two-piece design for permitting and directing exhaust of CO2 laden air. A baffle chamber formed in the clearance of the two pieces provides an area where noise is reduced. As CO2 laden exhaust exits the swivel exhaust conduit, it is directed away from the patient mask and down the outside of the delivery conduit via a slit pattern on the swivel conduit.

Abstract: A device is disclosed for adjusting the length of a strap on a mask for aquatic activities. The mask comprises a frame for supporting one or more lenses and a plurality of fork-shaped portions extending from either side of the frame. Each portion contains a pivot about which a portion of a strap end is wrapped, the portion having a plurality of stop ribs on one side. The adjustment device comprises a stop lever housed in each portion and a tooth extending from the lever for engaging one of the ribs. The lever has a substantially U-shaped member and a tongue extending from the base of the member such that the tongue is coplanar with and cantilevered in the lever. On a side opposite the tooth, a head extends from the tongue, against which a wedge-shaped portion of a button abuts, sliding with respect to the fork-shaped portion on a plane generally parallel to the U-shaped member.

Abstract: Carbon dioxide indicator for receiving gas containing carbon dioxide and for providing a visible indication of the presence of carbon dioxide in the gas, the indicator includes a connector for removably connecting the indicator to a source of gas containing carbon dioxide and which connector is for communicating at least a portion of such gas to the indicator. The carbon dioxide indicator may be a disk indicator and the connector may be a male luer or a locking male luer. The carbon dioxide indicator may include removable ultraviolet radiation shielding permitting the carbon dioxide indicator to be preassembled to a patient's respiratory or breathing circuits or to a resuscitator.

Abstract: A tracheotomy valve unit for use with a tracheotomy tube inserted into a patient's trachea comprises a first end for connection to the tracheotomy tube, a second end comprising a valve unit inlet, a first valve that permits airflow to the tube when the patient inhales and blocks airflow from the tube when the patient exhales thereby permitting speech, and a second valve that permits airflow from the tube back out the valve unit when the intrathoracic pressure during expiration is greater than about 12 cm of water. The second valve functions as a pressure release valve that increases tolerance and wearing comfort. In one embodiment, the second valve comprises a slit valve or an umbrella valve.

Abstract: A nasal mask for applying pressurized gas to a user's respiratory system. The mask includes an inflatable seal which is at least partially filled with a soft open cell foam. The seal includes a manual pump and a pressure release valve for inflating and deflating the seal. The mask includes an brow bar which is connected through a bridge to the mask body. The bridge can be adjusted to position the brow bar against the user's forehead for supporting an upper portion of the mask. Headgear for attaching the mask to the user is attached to the brow bar and is looped over a prong at a lower portion of the mask for securing the lower portion of the mask to the user. The mask can be easily removed from the patient while leaving the headgear and brow bar attached to the user.

Abstract: A respiratory mask assembly for delivering breathable gas to a patient includes a mask frame having a first cooperating interlocking structure. A cushion clip having a second cooperating interlocking structure is selectively detachable to the mask frame. The first and second cooperating interlocking structures interlock with one another in a cooperating relationship to secure the cushion clip on the mask frame. A mask cushion has a portion positioned between the mask frame and the cushion clip so as to retain the mask cushion on the mask frame.

Abstract: A quick pressure reducer and cylinder valve for use with an SCBA includes a cylinder valve that connects to a pressure vessel, a pressure reduction assembly for reducing the pressure of breathing air provided by the pressure vessel, a probe, and an inlet/latch assembly. The probe includes a notch and a threadless probe tip, and the inlet/latch includes a corresponding receptacle and one or more latches adapted to fit into the notch to retain the probe in the receptacle. A pushbutton switch in the receptacle is triggered by insertion of the probe tip therein, thereby providing an electrical signal. Probes of different lengths may be used to correspond to different pressure capacities, and the inlet/latch assembly may be arranged either to permit the insertion of only probe size or may be arranged to accept both sizes but to function differently based on the size of the probe. The latches are inoperable except at or below a nominal pressure.

Abstract: A ball and socket-type swivel connector for use with second stage regulators used by scuba divers. The ball is made from a metal with good corrosion resistance. The ball is then held into a true position by two separate low friction bushings. The two bushings, “sandwich” the metal swivel ball with light assembly pressure. This is accomplished by machining or molding the same radius of the swivel ball into one side of each of the two low friction bushings. As system pressure increases, the ball is forced rearwards and the squeeze increases. No seawater can enter the swivel. No area exists for seawater to collect around the O-ring. The bushing occupies all of the available space except for the gap provided around the O-ring gland an area used to hold lubrication. The preferred embodiment uses a high grade stainless steel swivel ball, virgin Teflon bushing material and an internally lubricated low friction O-ring.

Abstract: A patient gas delivery apparatus includes a mask structured to communicate with a patient's airway, a gas flow generator structured to supply pressurized gas, a gas delivery conduit having first and second opposing ends, the first opposing end being connected to the gas flow generator, and a connecting assembly including an anti-asphyxia valve member. The connecting assembly is connected in series between the conduit and the mask. The connecting assembly has a distal end and a proximal end with the distal end being configured and positioned to connect to the second opposing end of the conduit and the proximal end being configured and positioned to connect to the mask. The mask and the conduit are not adapted for direct interconnection without the connecting assembly.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element sufficient to close the inlet opening to fluid flow absent a pre-established level of pressure exerted on the pressure responsive element in opposition to the bias force. Finally, a retainer device is positioned for removably securing the pressure responsive element and bias force exerting mechanism within the passageway.

Abstract: The present invention relates to a device to rotate a previously unrotatable receiver used with helmets, preferably aircraft helmets.

Abstract: A unilimb breathing circuit has a proximal end coupling member, a distal end coupling member, an expiratory tube extending between the proximal and distal end coupling members, and an inspiratory tube extending between the proximal and distal end coupling members. The expiratory tube is a corrugated expiratory tube that is expandable between a fully compressed rest position, and a fully expanded rest position, and has a plurality of intermediate rest positions. At the plurality of intermediate rest positions, the expiratory tube is capable of maintaining its rest length without the exertion of an external force. The inspiratory tube is a corrugated inspiratory tube having a length that is variable between a fully compressed rest position and a fully expanded rest position, and includes a plurality of intermediate rest positions between the fully expanded rest position and the fully compressed rest position.

Abstract: The present invention is a headgear for noninvasive ventilation interface made up of a nasal cannula including cannula tubing having a given outside diameter, and a headgear yoke with ends including tubing retainers. The yoke is adapted to extend transversely over a wearer's head. The tubing retainers are C-shaped projections having a given length and an inside diameter substantially equal to the tubing outside diameter. The present invention further includes a retainer mating element for each of the C-shaped tubing retainers to prevent the tubing from kinking near the C-shaped tubing retainers. The retainer mating element has an elbow section with an open side and a clip section connected to the elbow section by a rigid beam having a length substantially equal to the C-shaped tubing retainer given length, wherein both of the sections have an inside diameter substantially equal to the tubing given outside diameter.

Abstract: An air transfer apparatus for transferring air from a replenishment air cylinder to another air cylinder is provided. The air transfer apparatus comprises a first valve adapted to engage a replenishment air cylinder and a second valve having quick connect fittings adapted to engage one or more air cylinder fittings mounted on one or more air cylinders. A high pressure hose provides gaseous communication between the first valve and the second valve. A regulator is positioned between the first valve and the second valve. The regulator is adapted to control the air pressure in the high pressure hose between the first valve and the second valve to match the air pressure needed in one of the one or more air cylinders.

Abstract: An adapter couples a patient's breathing circuit to a ventilator. In the preferred embodiment, the adapter comprises an inhalation conduit having a first end for coupling the adapter to the ventilator and a second end for coupling the adapter to the patient breathing circuit; an exhalation conduit having a first end for coupling the adapter to the patient breathing circuit and a discharge conduit, the discharge conduit transversely oriented to the inhalation conduit; an exhaust port communicating with the discharge conduit for releasing breathed gas from same; a valve selectively opening and closing the discharge conduit to release gas from same; and a base comprising means for releasably coupling the adapter to the ventilator.

Abstract: A support arm for use in a respiratory circuit is provided. The support arm includes a plurality of arm segments that are movably connected with one another such that the arm segments are adjustable with respect to another. At least one inflatable bladder is provided. The bladder is operably disposed at a point of connection between at least two of the arm segments. The arm segments are locked into position with respect to one another upon inflation of the bladder. The arm segments are released and positionable with respect to one another upon deflation of the bladder. Also, a respiratory support member is attached to one of the arm segments. The respiratory support member is configured for engaging the respiratory circuit to support the respiratory circuit.

Abstract: An apparatus for supplying a respiratory gas includes a blowing device for delivering the respiratory gas, a housing device having a bottom region, a top surface region and a side region extending upwardly between the top surface region and the cover region, as well as a connecting device for connecting a humidifying apparatus. The connecting device is arranged in the side region of the apparatus in such a way that the humidifying apparatus can be laterally coupled thereto. The humidifying apparatus may include a partial amount discharge device for passing a partial amount of the liquid pre-stored in a liquid storage space into a humidifying region. A respiration tube includes a connecting plug structure which has both a respiratory gas connecting portion and a pressure measuring tube connecting portion.

Abstract: A connection component for a detachable component on a respirator product is provided with which the component can be connected to the respirator product in a simple manner. A bayonet connection (6, 7) is provided between the component and the respirator product. The bayonet connection can be connected in a preferred position and has a first connection part (9) with projecting tongues and a second connection part (10) with recesses designed corresponding thereto. A centering ring (14) is provided on the first connection part (9). The centering ring is arranged around the tongues. A cylindrically designed circumferential surface (11) is provided on the second connection part (10). The circumferential surface is designed as a surface that can be introduced into a groove (13) at the centering ring (14).

Abstract: A connection device for connecting a headgear and a mask and a system for supplying a flow of gas to a patient that incorporates such a connection device. The connection device allows independent rotation of each of two independently disconnecting headgear connectors. The gas delivery mask includes a shell, a first connector associated with the shell, a second connector connected to a headgear and realeasably and rotateably connected to the first connector.

Abstract: The present invention provides a system for a gas delivery and monitoring system for delivering a gas product to a patient and receiving a gas product exhaled from a patient. In an embodiment, the gas delivery and monitoring system includes a head support made of resilient material and having therein a facial cavity. The facial cavity is configured to fit the contours of a patient's face and provides an oxygen rich environment for the patient while undergoing a medical procedure. In an embodiment, the facial cavity is shaped substantially in the form of a figure eight. In an embodiment, the facial cavity is further provided with one or more segmented edges that can be removed to further shape the facial cavity to the contours of the patient's face. In an embodiment, tubing is used to deliver oxygen from an oxygen source to the patient. Similarly, tubing is also used to receive carbon dioxide exhaled by the patient so that it might be measured by a carbon dioxide monitor.

Abstract: An airway adapter suitable for use with patients having low tidal volumes, e.g., neonates, which minimizes deadspace in the airway and promotes smooth flow of gases through the adapter. The adapter includes a first portion adapted to couple to a tubular adapter, such as an endotracheal tube adapter, and a second portion adapted to couple to a ventilation tube. A longitudinally compressible member is coupled to the first portion to minimize deadspace in the adapter. A portion of the compressible member resiliently contacts and seals against a tubular adapter upon assembly of the airway adapter therewith.

Abstract: An inhaler for holding a canister (2) of medicament. The canister (2) has a mount (26) secured thereto mounting an indication member (41) movable slidably from a first state to a second state. A ratchet arrangement (41a, 42) is provided between the mount (26) and the indication member (41) to make the movement irreversible. The inhaler has a catch (49) for moving the indication member from the first state to the second state on removal of the canister (2) from the inhaler. An electrical switch contact (48) detects the state of the indication member (41), thereby providing an indication of whether the canister (2) has been used before. An LCD display is controlled in response to the detection.

Abstract: Disclosed is an anesthesia adapter that is suitable for the simultaneous insertion of multiple devices or instruments into the lungs during ventilation of the patient, while minimizing or eliminating gas leaks. The anesthesia adapter comprises in one embodiment a first port sized to receive a first elongate instrument; a second port sized to receive a second elongate instrument; an endotrachial tube fitting configured to be coupled to an endotrachial tube, the endotrachial tube fitting fluidly coupled to the first and second ports; and a hose fitting configured to be coupled to a ventilator hose, the hose fitting fluidly coupled to the first and second ports. The first port seals around the first elongated instrument and the second port seals around the second elongate instrument.

Abstract: An elbow assembly for use in a respiratory mask, which includes an elbow, an inlet port, an exhaust port, and a baffle separating the inlet port from the exhaust port. A mask assembly includes a cushion comprising at least one gusset and an aperture for connection to the elbow assembly.

Abstract: An apparatus and method for humidification of inspired gases, wherein the present invention utilizes moisture from condensed expiratory gases deposited within the outer expiratory tube of a conventional unilimb breathing circuit to humidify oxygen gas (or any other inspiratory gas) for subsequent patient inhalation, and wherein the oxygen gas may be directed through the outer expiratory tube via a novel reverse flow adapter coupled to an oxygen gas source. The present invention preferably functions to effectively eliminate prior art methods of oxygen gas humidification that depend upon the wasteful utilization of bottles of sterile water, corrugated tubing, nebulizer adapters and excess consumption of oxygen gas; thus, effectuating a cost savings for the patient and contributing to overall environmental conservation efforts.

Abstract: A retaining device (1) for ventilation tubes (5) has two gripping jaws (2, 3), which can be locked into each other by means of a rack (11). The lower gripping jaw (3) can be attached to a stretcher via a bracket (6).

Abstract: A suction connector, comprising a fluid passage (31) having one end to be connected to a conduit and the other end to be connected to a suction source when in use and a ventilating passage (32) branched in the middle of the fluid passage and having an opening end (33), wherein a blocking plate (34) is disposed at least at a partial region on a fluid passage side inside the ventilating passage, the cross-section of the ventilating passage is divided by the blocking plate into a plurality of regions, and fluid advancing from the fluid passage into the ventilating passage is prevented by the blocking plate from flowing out from the opening end, whereby a sucking force caused by an releasing a negative pressure can be regulated sufficiently, spattering of fluid can be surely prevented to thus eliminate the danger of contamination and infection to an operator and assuring sanitation, and a structure is simplified.

Abstract: An apparatus for delivering anaesthetic to human or animal patients. The apparatus is an anaesthetic machine which is arranged to mount components of an anaesthetic delivery circuit, and which includes a collector arrangement in the form of a manifold having a plurality of inlets and outlets. The manifold enables a reduction in the number of tubes connecting the various components in an anaesthetic system, which are normally required in prior art anaesthetic machines. The manifold also includes an arrangement which provides a Venturi effect on gas flow, and enables a pressure gauge to be mounted out of a patient breathing circuit. The machine is preferably portable.

Abstract: An air and water hose apparatus for use in an air supply system for firefighters. The air and water hose apparatus has an air hose completely within the water hose. The air and water hose apparatus comprises only a single length of the overall water hose of the system. This ensures that no part of the air hose is exposed to possible damage. The system supplies high pressure air to the firefighters. The system allows for easy connect and disconnect of the air and water hose apparatus to the firefighter's mask and preferably can be used with standard self-contained breathing apparatus having a mask and a regulator. A branched conduit allows several firefighters to be attached to a single air and water hose apparatus.

Abstract: Carbon dioxide indicator for receiving gas containing carbon dioxide and for providing a visible indication of the presence of carbon dioxide in the gas, the indicator includes a connector for removably connecting the indicator to a source of gas containing carbon dioxide and which connector is for communicating at least a portion of such gas to the indicator. The carbon dioxide indicator may be a disk indicator and the connector may be a male luer or a locking male luer.

Abstract: This invention is a neonatal airway adapter (10) with a sliding internal passage (54), which virtually eliminates void volumes (112) within the bore (76) of the airways, such that mixing of the exhaled gases with void gases is reduced, and the waveform of the breath is maintained without undue distortion. Furthermore, the virtual elimination of void volumes reduces the level of re-breathing. The neonatal airway adapter connects to endotracheal tube adapters in such a way as to nullify the effect of the differing internal diameters (20) and internal lengths which are used in ET adapters currently available. The cross section of the internal bore of the airway through which the breath flows from the ET adapter to the connector of the ventilator is maintained almost constant, especially in the region of the gas sampling point (66), to ensure that reasonable conditions of laminar flow, and accurate sampling are maintained.

Abstract: A compressed air breathing apparatus having a base plate, at least one compressed air bottle detachably mounted to the base plate using a fastening strap and an additional fixing device, and a high-pressure fitting attached to the at least one compressed air bottle. The at least one additional fixing device has at least one mounting hole which is provided in the base plate and a fixing piece on the high-pressure fitting capable of being moved directly into and locked in the mounting hole.

Abstract: A respiratory mask assembly for delivering breathable gas to a patient includes a frame having a main body and a side frame member provided on each lateral side of the main body. Each side frame member includes an integrally formed first connector portion. A headgear assembly is removably attachable to the frame. The headgear assembly has a second connector portion adapted to be removably coupled with the first connector portion provided on the frame. The second connector portion is manually movable to a releasing position to detach the headgear assembly from the frame. The headgear assembly is rotationally adjustable with respect to the frame.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to fluid pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element which is sufficient to close the inlet opening to fluid flow absent a pre-established level of fluid pressure exerted on the pressure responsive element. A fluid filter element is also disposed within the passageway; and a retainer device is positioned for removably securing the filter element within the passageway.

Abstract: A modular respirator system has interchangeable facial lenses and body seals such as a full facepiece seal or a hood. A method of conversion from a full facepiece respirator to a hood respirator, or vice versa, is also disclosed. In one embodiment, lens conversion is accomplished without changing the type of body seal. In another embodiment, a breathable gas delivery conduit is connected to the facial lens and interchanged between the body seals together with the facial lens.

Abstract: The present invention relates to a device for delivering a supply of gases to a patient. The device includes a patient interface and connecting member. The connecting member is preferably a L-shaped swivelled connector that is capable of being fixed into one of two positions, a first position where the connector is freely rotatable within the patient interface, and a second position where an interference between the interface and connector prevents the free rotation of the connector within the patient interface. The present invention further relates to a connector that has outlet means, which includes at least one outlet vent and a funnel, which in use directs and passes a substantial portion gases expired from the patient through the outlet vent or vents.

Abstract: An air delivery system includes a coupling mechanism that is adapted to be connected between a source of oxygen-enriched air and an air cannula that can be worn by a user. The coupling mechanism includes a spool assembly for paying out and for winding up a predetermined length of tubing coupled between the air cannula and the source of oxygen-enriched air. The spool assembly has a sufficiently low drag factor to allow complete mobility of a user wearing the cannula without causing it to be dislodged during pay out of the predetermined length of tubing and without causing it to be dislodged during take up of the predetermined length of tubing.

Abstract: A gas circuit has an outlet and an inlet. Circuit adapters are provided. An anesthesia breathing circuit has tubular breathing circuit hoses, a Y connector and a connecting elbow. The breathing circuit has an electronically conductive system of wires and contacts to form two unconnected parallel electric circuits. An endotracheal tube has a conductive strip. A capnograph has a sampling tube coupled to the breathing circuit. The capnograph is electrically coupled to the separate electric circuits. The capnograph begins an adjustable timer when the endotracheal connector completes the electrical circuit by connecting the endotracheal tube to the breathing circuit. The timer provides for the transmission of an alarm when the circuit had been completed and no carbon dioxide was detected in the breathing hoses within a predetermined amount of time. The timer also provides for the transmission of an alarm when the circuit had been completed and had been disconnected.

Abstract: The invention provides an apparatus for supplying a respiratory gas to a respiratory air way of a patient. The respiratory gas supplying apparatus 10 includes a cylinder 12 filled with a respiratory gas, a cart 14 having an accommodating portion for disposing the cylinder 12, a shut-off valve 18 attached to the cylinder 12, a flow regulating valve 40 attached to the shut-off valve 18, a conduit 22, attached to the flow regulating valve 40, for directing the respiratory gas to the inlet of the respiratory airway of the patient, a coupler 16, integrally connected to the flow regulator 40, for coupling the flow regulating valve 40 to the shut-off is valve 18, and a linkage 110 for disengaging the coupler 16 from the shut-off valve IS when the cylinder 12 is detached from the cart 14.

Abstract: A respiratory apparatus includes an instrument introduction section that is used for introducing an instrument into an artificial airway of a patient. The instrument introduction section has a distal end and proximal end with an opening which allows for insertion of the instrument into the instrument introduction section. The instrument is movable through the passageway in the instrument introduction section between the proximal and distal ends. A valve is located in the instrument introduction section and has a closed position in which the instrument may be isolated from the artificial airway of the patient. The valve at least substantially blocks the passageway of the instrument introduction section when in the closed position. The valve also has an open position that allows for the instrument to be advanced through the instrument introduction section. A manifold is attached to the distal end of the instrument introduction section. The manifold is in communication with the artificial airway of the patient.

Abstract: An actuator for an inhaler for administering medicament by inhalation, comprising: a main body (102) comprising an elongate tubular member (108) for receiving a canister (107) containing medicament and having a valve stem (111) extending therefrom, the tubular member (108) including a lateral opening (114) at one end thereof; and an outlet assembly (104) comprising a mouthpiece for guiding medicament to the mouth of a user and a nozzle block (120) for receiving the valve stem (111) of the canister (107) and delivering medicament from the canister (107) into the mouthpiece, the outlet assembly (104) being detachably mounted, through the lateral opening (114), to the main body (102) at an angle transverse to the length of the tubular member (108); characterized in that one of the main body (102) and the outlet assembly (104) further comprises at least one resiliently biased member, which is configured to engage with at least one part of the other of the main body (102) and the outlet assembly (104) and thereby

Abstract: A closure device (10) is disclosed for use with an access port (62,72,82,92) of a medical respiratory apparatus (60,70,80,90). The closure device (10) comprises a cap (14) that seals the access port (62,72,82,92) save for an opening (28) in the cap (14), and a closure (16) for sealing the opening (28). The cap (14) includes a portion of flexible material (26) in which the opening (28) is formed, and is hingedly mounted with respect to the access port (62,72,82,92).

Abstract: Inflator regulator having a threaded sleeve and a plurality of different size adapters for connection to a plurality of different size BC hoses. Connecting the inflator regulator to a selected BC hose is accommodated by selecting the corresponding size adapter. The selected adapter is inserted concentrically through the threaded sleeve and then mechanically affixed, such as by a plastic cable tie, to the end of the BC hose. The sleeve is then threaded onto the inflator regulator. In the event that it is desired to connect to a different size BC hose, the above process is simply reversed and repeated using an appropriately selected different adapter.

Abstract: An expiration cassette is removably insertable in a receiving section of a ventilator and contains a gas passage, an expiratory valve and a flow meter. The expiratory cassette also has a locking mechanism for locking and unlocking interaction with a receiving section in the ventilator.

Abstract: A valved aerosol Tee adapter assembly comprises a housing member having an upper section with a first interior passageway, a spring chamber between the first passageway and the inner wall of said upper section and a valve seat formed along the upper edge of said upper section, and a lower section having a second passageway contiguous with the first passageway, a compressible spring positioned in the chamber; and a valve reciprocally movable in the housing comprising a valve actuator slidably received in the second passageway having an upper surface for engaging the compressible spring, and a valve member secured to the valve actuator.

Abstract: A respirator (10) that includes a face piece (14) and a cartridge receiving structure (22) located on the face piece (14). The face piece (14) is sized to fit snugly over the nose and mouth of a person, and the filter cartridge (12) is capable of being manually snapped into engagement with the cartridge receiving structure (22). The snap-fit can be instantaneously obtained without rotational movement of the filter cartridge (12), simply by pressing the filter cartridge (12) against the receiving structure (22).