Patents by Inventor Michael K. Gunaratnam

Michael K. Gunaratnam 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).

  • Patent number: 9808589
    Abstract: A respiratory mask assembly includes a rigid mask frame and a cushion. A clip secures the cushion to the frame.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: November 7, 2017
    Assignee: RESMED LIMITED
    Inventors: Michael K Gunaratnam, Gregory S Smart, Philip R Kwok
  • Patent number: 9592359
    Abstract: A respiratory mask assembly includes a respiratory mask including a mask shell and a mask cushion, a forehead support adjustably coupled to the mask, and an angular adjustment member. The forehead support includes a joining member provided to the mask shell and a cushion frame pivotally mounted to the joining member. The cushion frame is adapted to be selectively locked against pivotal movement in at least three predetermined angular positions relative to the joining member by a tongue and slot arrangement. The angular adjustment member allows relative angular adjustment between the cushion frame and the joining member. The angular adjustment member includes a pair of flexible arms that are adapted to be flexed towards one another to disengage the tongue from a respective one of the slots, and releasing the flexible arms allows the flexible arms to resiliently flex away from one another to engage the tongue and the respective slot.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: March 14, 2017
    Assignee: ResMed Limited
    Inventors: Philip R. Kwok, Michael K. Gunaratnam, Perry D. Lithgow, Jonathan P. Harrison, Jonathan L. Liston, Robert S. Matchett, Robert E. Styles
  • Patent number: 9072853
    Abstract: A forehead pad for use in a respiratory mask with a forehead support, which includes a base portion to contact a user's forehead, a support post connected to the base portion, and a head adapted to connect the support post to a forehead support. A pair of forehead pads may be joined with a connector.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: July 7, 2015
    Assignee: ResMed Limited
    Inventors: Bernd Christoph Lang, Timothy Tsun-Fai Fu, Perry David Lithgow, Memduh Guney, Joanne Elizabeth Drew, Martin Bechtel, Achim Biener, Michael K. Gunaratnam, Aaron Samuel Davidson, Milind Chandrakant Raje
  • Patent number: 8985117
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 24, 2015
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Patent number: 8978653
    Abstract: A mask system for delivering air to a user includes a suspension mechanism to allow relative movement between a face-contacting cushion and a mask shell. The suspension mechanism also provides a predetermined force to the cushion that is a function of mask pressure, displacement of the cushion or both.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: March 17, 2015
    Assignee: ResMed Limited
    Inventors: Robert H. Frater, Joanne Drew, Michael K. Gunaratnam
  • Patent number: 8667965
    Abstract: A respiratory mask assembly includes a rigid mask frame and a cushion. A clip secures the cushion to the frame.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: March 11, 2014
    Assignee: RedMed Limited
    Inventors: Michael K. Gunaratnam, Gregory S. Smart, Philip R. Kwok
  • Patent number: 8567402
    Abstract: Mask ports 180 for attaching supplemental oxygen tubes 510 or measurement devices to a respiratory mask are downwardly directed and recessed into the base 110 of the mask frame 100. The ports may comprise a pair of downwardly extending tubular spigots 185 each housed in a respective recess 190 in the base 110, with a shallow bridging recess 290 therebetween for receiving a bridging piece 300 of a closure cap 280.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: October 29, 2013
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Amal Amarasinghe
  • Patent number: 8439039
    Abstract: A respiratory mask includes a mask shell defining an interior of the respiratory mask and a gas washout vent passage having an inlet forming part of the mask shell and in fluid communication with the interior and an outlet in fluid communication with atmosphere. The mask shell includes a tubular mask inlet adapted to connect to a breathable gas supply conduit. The outlet includes an interior surface that forms a smooth prolongation with an adjacent exterior surface of the mask shell, and the outlet is adapted to direct washout gas in a direction substantially parallel to a longitudinal axis of the mask inlet and away from the mask inlet. The mask shell includes a body portion and a cap portion.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: May 14, 2013
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Joanne E. Drew, Geoffrey Crumblin, Phillip Jenkinson, Susan Robyn Lynch
  • Patent number: 8424530
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: April 23, 2013
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Publication number: 20130008447
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: ResMed Limited
    Inventors: Michael K. GUNARATNAM, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Patent number: 8312883
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: November 20, 2012
    Assignee: Resmed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Patent number: 8312881
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: November 20, 2012
    Assignee: Resmed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Patent number: 8286636
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: October 16, 2012
    Assignee: Resmed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Publication number: 20120222681
    Abstract: A respiratory mask assembly includes a respiratory mask including a mask shell and a mask cushion, a forehead support adjustably coupled to the mask, and an angular adjustment member. The forehead support includes a joining member provided to the mask shell and a cushion frame pivotally mounted to the joining member. The cushion frame is adapted to be selectively locked against pivotal movement in at least three predetermined angular positions relative to the joining member by a tongue and slot arrangement. The angular adjustment member allows relative angular adjustment between the cushion frame and the joining member. The angular adjustment member includes a pair of flexible arms that are adapted to be flexed towards one another to disengage the tongue from a respective one of the slots, and releasing the flexible arms allows the flexible arms to resiliently flex away from one another to engage the tongue and the respective slot.
    Type: Application
    Filed: May 14, 2012
    Publication date: September 6, 2012
    Applicant: ResMed Limited
    Inventors: Philip R. KWOK, Michael K. Gunaratnam, Perry D. Lithgow, Jonathan P. Harrison, Jonathan L. Liston, Robert S. Matchett, Robert E. Styles
  • Publication number: 20120204869
    Abstract: A connector arrangement joining a respiratory mask and headgear is adapted for single-handed disengagement by the patient. A first, rigid connector part is formed into the rigid mask frame, with a mating second connector attached to a strap of the headgear. The connectors are held away from the patient's face by the connection to the mask frame.
    Type: Application
    Filed: April 25, 2012
    Publication date: August 16, 2012
    Applicant: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok
  • Patent number: 8186352
    Abstract: A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and/or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: May 29, 2012
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch
  • Publication number: 20120048276
    Abstract: A respiratory mask includes a mask shell defining an interior of the respiratory mask and a gas washout vent passage having an inlet forming part of the mask shell and in fluid communication with the interior and an outlet in fluid communication with atmosphere. The mask shell includes a tubular mask inlet adapted to connect to a breathable gas supply conduit. The outlet includes an interior surface that forms a smooth prolongation with an adjacent exterior surface of the mask shell, and the outlet is adapted to direct washout gas in a direction substantially parallel to a longitudinal axis of the mask inlet and away from the mask inlet. The mask shell includes a body portion and a cap portion.
    Type: Application
    Filed: August 24, 2011
    Publication date: March 1, 2012
    Applicant: ResMed Limited
    Inventors: Michael K. Gunaratnam, Joanne E. Drew, Geoffrey Crumblin, Phillip Jenkinson, Susan R. Lynch
  • Patent number: D651303
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: December 27, 2011
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch, Rachael E. Moore
  • Patent number: D656607
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: March 27, 2012
    Assignee: ResMed Limited
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch, Rachael E. Moore
  • Patent number: D800299
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: October 17, 2017
    Assignee: RESMED LIMITED
    Inventors: Michael K. Gunaratnam, Philip R. Kwok, Robin G. Hitchcock, Lee J. Veliss, Memduh Guney, Richard Sokolov, Perry D. Lithgow, Donald Darkin, Susan R. Lynch, Rachael E. Moore