Patents by Inventor Lawrence W. Cheney

Lawrence W. Cheney 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).

  • Reversible unidirectional flow pump with axial frictionally engaged recessed valve plate
    Patent number: 4331421
    Abstract: A reversible positive displacement rotary fluid pump comprising a rotor with either dual sliding vanes or a single vane defining pumping cavities of increasing and decreasing volume and having a single non-valved inlet for both directions of rotation, outlet flow being controlled by a valve plate rotatable to one of two positions, as determined by the direction of rotation of the pump.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: May 25, 1982
    Inventors: Othel L. Jones, Lawrence W. Cheney