Patents by Inventor Alexander Urquhart

Alexander Urquhart 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).

  • Quiet blower apparatus and system and method for reducing blower noise
    Patent number: 11788548
    Abstract: A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: October 17, 2023
    Inventors: Robert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon
  • QUIET BLOWER APPARATUS AND SYSTEM AND METHOD FOR REDUCING BLOWER NOISE
    Publication number: 20200018324
    Abstract: A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 16, 2020
    Applicant: ResMed Pty Ltd
    Inventors: Robert Henry FRATER, Hamish Alexander URQUHART, Dmitri Anatolievich DOUDKINE, Barton John KENYON
  • Quiet blower apparatus and system and method for reducing blower noise
    Patent number: 10393142
    Abstract: A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: August 27, 2019
    Assignee: ResMed Pty Ltd
    Inventors: Robert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon
  • Quiet Blower Apparatus and System and Method for Reducing Blower Noise
    Publication number: 20140230244
    Abstract: A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Application
    Filed: March 5, 2014
    Publication date: August 21, 2014
    Applicant: ResMed Limited
    Inventors: Robert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon
  • Quiet blower apparatus and system and method for reducing blower noise
    Patent number: 8702379
    Abstract: A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: April 22, 2014
    Assignee: ResMed Limited
    Inventors: Robert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon
  • Wellhead tree pressure compensating device
    Patent number: 8695712
    Abstract: A pressure mitigating device is used to reduce pressure in a void within a wellhead housing. In one embodiment, the pressure mitigating device includes two plates that define a void between them. Increased pressure in the wellhead housing causes the plates to elastically displace towards each other. The plates contact each other, limiting the displacement prior to plastic deformation.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: April 15, 2014
    Assignee: Vetco Gray Inc.
    Inventors: Alexander Urquhart, William D. Munro
  • WELLHEAD TREE PRESSURE COMPENSATING DEVICE
    Publication number: 20120168173
    Abstract: A pressure mitigating device is used to reduce pressure in a void within a wellhead housing. In one embodiment, the pressure mitigating device includes two plates that define a void between them. Increased pressure in the wellhead housing causes the plates to elastically displace towards each other. The plates contact each other, limiting the displacement prior to plastic deformation.
    Type: Application
    Filed: December 29, 2010
    Publication date: July 5, 2012
    Applicant: VETCO GRAY INC.
    Inventors: Alexander Urquhart, William D. Munro
  • Quiet Blower Apparatus and System and Method for Reducing Blower Noise
    Publication number: 20100006097
    Abstract: A blower assembly including a motor (4), an impeller (6) and a volute (8) that is configured such that an inlet chamber (112) of the volute and an outlet chamber (114) of the volute are divided from one another by an airtight membrane (128a-b) and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
    Type: Application
    Filed: December 20, 2006
    Publication date: January 14, 2010
    Inventors: Robert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon