Patents by Inventor David Fraser Wixey
David Fraser Wixey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190030276Abstract: A breathing assistance apparatus adapted to deliver humidified gases at a desired level of humidity to a patient including a humidifier and a heated conduit is disclosed. The humidifier includes a controller which determines the flow rate of the gases and then determines the required power input to the humidifier to deliver the gases to the patient at the required patient humidity. This means the need for external sensors is dispensed with and thus the apparatus is simple and less bulky.Type: ApplicationFiled: June 18, 2018Publication date: January 31, 2019Inventors: Peter John Hunt, Mohammad Thudor, David Fraser Wixey, Stephen William McPhee
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Patent number: 10130787Abstract: A breathing assistance apparatus adapted to deliver humidified gases at a desired level of humidity to a patient including a humidifier and a heated conduit is disclosed. The humidifier includes a controller which controls the humidifier, or the humidifier and the heated conduit to deliver the gases to the patient at the required humidity or temperature, without the requirement for sensors in the gases stream. The controller uses information already available to the controller, without the requirement for additional information to be provided by sensors in the gases stream. This means the need for sensors in the gases stream is dispensed with. A significant benefit is achieved as sensors are not required in the conduit and thus the apparatus is simple and less bulky.Type: GrantFiled: November 16, 2015Date of Patent: November 20, 2018Assignee: Fisher & Paykel Healthcare LimitedInventors: Peter John Hunt, Mohammad Thudor, David Fraser Wixey, Stephen William McPhee
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Publication number: 20160067443Abstract: A breathing assistance apparatus adapted to deliver humidified gases at a desired level of humidity to a patient including a humidifier and a heated conduit is disclosed. The humidifier includes a controller which controls the humidifier, or the humidifier and the heated conduit to deliver the gases to the patient at the required humidity or temperature, without the requirement for sensors in the gases stream. The controller uses information already available to the controller, without the requirement for additional information to be provided by sensors in the gases stream. This means the need for sensors in the gases stream is dispensed with. A significant benefit is achieved as sensors are not required in the conduit and thus the apparatus is simple and less bulky.Type: ApplicationFiled: November 16, 2015Publication date: March 10, 2016Inventors: Peter John Hunt, Mohammad Thudor, David Fraser Wixey, Stephen William McPhee
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Patent number: 8636002Abstract: A respiratory humidifier chamber for use with a breathing assistance apparatus is described. The chamber includes a water-tight vessel having an inlet for receiving gases from the breathing assistance apparatus, and an outlet through which heated humidified gases exit the vessel for delivery to a patient. The chamber has a partition which divides the chamber into upstream and downstream sub-chambers. The sub-chambers are separated by the partition except for an aperture which passes through the partition and allows gaseous communication between the sub-chambers. The downstream sub-chamber includes a heater base which heats a volume of water contained within it. The aperture is located above the volume of water. The upstream sub-chamber contains an internal heater which heats gases passing through it from the inlet to the aperture. At least part of the internal heater is located immediately adjacent the aperture.Type: GrantFiled: August 24, 2007Date of Patent: January 28, 2014Assignee: Fisher & Paykel Healthcare LimitedInventors: Alastair Edwin McAuley, Raymond Ka Yau Lo, David Fraser Wixey, Ian Douglas Makinson
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Patent number: 7681575Abstract: A patient interface is described which is reduces the pressure of the mask on the users face. The patient interface has a sealing interface having an inner sealing member and an outer sealing member. The inner and outer sealing members are adapted to seal around the facial contours of a user providing a sealed fluid communication to the user's respiratory tract. The inner and outer sealing members are at least continuously in contact with each other around the portions where the sealing interface contacts the users facial contours. The inner sealing member may be provided with cut outs to provide additional flexibility to particular areas, such as the nasal bridge, upper lip or cheek regions and may be provided with a contoured edge to better fit the facial contours of a user.Type: GrantFiled: November 7, 2007Date of Patent: March 23, 2010Assignee: Fisher & Paykel Healthcare LimitedInventors: David Fraser Wixey, Alastair Edwin McAuley, Christopher Earl Nightingale, Lewis George Gradon, Ivan Milivojevic
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Publication number: 20100043791Abstract: A respiratory humidifier chamber for use with a breathing assistance apparatus is described. The chamber comprises a water-tight vessel having an inlet for receiving gases from the breathing assistance apparatus, and an outlet through which heated humidified gases exit the vessel for delivery to a patient. The chamber has a partition which divides the chamber into upstream and downstream sub-chambers. The sub-chambers are separated by the partition except for an aperture which passes through the partition and allows gaseous communication between the sub-chambers. The downstream sub-chamber includes a heater base which heats a volume of water contained within it The aperture is located above the volume of water. The upstream sub-chamber contains an internal heater which heats gases passing through it from the inlet to the aperture. At least part of the internal heater is located immediately adjacent the aperture.Type: ApplicationFiled: August 24, 2007Publication date: February 25, 2010Inventors: Alastair Edwin McAuley, Raymond Ka Yau Lo, David Fraser Wixey, Ian Douglas Makinson
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Patent number: 7478635Abstract: The present invention may include an integral, separable or separate humidifier (100) which may be selectively configured to an inoperative or operative state. The switch over is dependent on the user or the seller having access to an actuation tool to activate the humidifier. The Continuous Positive Airway Pressure (CPAP) device is initially available for use as a standalone CPAP (100). The heater plate being isolated by a covering shroud (102), the shroud (102) also forms a connection port for the CPAP blower outlet (104). The heated humidification hardware being disabled by the absence of the activation tool. Upgrade to a CPAP device including heated humidification is completed by the installation of the actuation tool. Removal of the heater plate isolating shroud and/or installing the actuation tool enables the software controlled heated humidification hardware for heated humidifier operation. Other upgrades to functionality are also disclosed.Type: GrantFiled: October 29, 2003Date of Patent: January 20, 2009Assignee: Fisher & Paykel Healthcare LimitedInventors: David Fraser Wixey, Ian Douglas Makinson
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Patent number: 7308895Abstract: A patient interface is described which is reduces the pressure of the mask on the users face. The patient interface has a sealing interface having an inner sealing member and an outer sealing member. The inner and outer sealing members are adapted to seal around the facial contours of a user providing a sealed fluid communication to the user's respiratory tract. The inner and outer sealing members are at least continuously in contact with each other around the portions where the sealing interface contacts the user's facial contours. The inner sealing member may be provided with cut outs to provide additional flexibility to particular areas, such as the nasal bridge, upper lip or cheek regions and may be provided with a contoured edge to better fit the facial contours of a user.Type: GrantFiled: July 11, 2003Date of Patent: December 18, 2007Assignee: Fisher & Paykel Healthcare LimitedInventors: David Fraser Wixey, Alastair Edwin McAuley, Christopher Earl Nightingale, Lewis George Gradon, Ivan Milivojevic