Patents by Inventor Richard Frigon

Richard Frigon 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: 4632013
    Abstract: A reciprocating piston fluid powered motor having fluid inlet and outlet, wherein reciprocation is controlled by a reciprocable valve spool carrying a manifold communicating with said fluid inlet and outlet and cooperating with a valve slide shiftable on said valve spool to control reciprocation of said valve spool.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: December 30, 1986
    Assignee: Sprague Devices, Inc.
    Inventors: Richard Frigon, Alan K. Forsythe