Patents by Inventor Robert Edwin Walmsley

Robert Edwin Walmsley 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).

  • Rotary piston machines
    Patent number: 3973883
    Abstract: A rotary piston machine comprising a housing having a bore to receive a three apexed rotor. The bore has a lining formed with a trochoidal surface. The lobes of the surface are formed on curved flexible metal elements and the re-entrant portions of the surface are formed on rigid bridging pieces between the ends of elements.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: August 10, 1976
    Assignee: Vandervell Products Limited
    Inventors: Robert Edwin Walmsley, Robert Oliver, Norman Ernest Fisher