Patents by Inventor John O'Mahony

John O'Mahony 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).

  • Gas mixing apparatus for a ventilator
    Patent number: 6116240
    Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: September 12, 2000
    Assignee: Purtian-Bennett Corporation
    Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
  • Gas mixing apparatus for a ventilator
    Patent number: 5934274
    Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: August 10, 1999
    Assignee: Puritan-Bennett Corporation
    Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
  • Gas mixing apparatus for a ventilator
    Patent number: 5664560
    Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: September 9, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea