Patents by Inventor Gerald C. Anderson

Gerald C. Anderson 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).

  • Three-way proportional valve
    Patent number: 4569273
    Abstract: An electrohydraulic proportional valve wherein an electromagnetic force motor sends a mechanical signal to a pilot actuator which moves a main spool. The pilot actuator includes a pilot spool slidably received in a pilot sleeve. A feedback spool which is movable with the main spool has a camming surface against which the pilot sleeve rides. A load check valve is provided that isolates the load pressure from system pressure when desired.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: February 11, 1986
    Assignee: Dynex/Rivett Inc.
    Inventors: Gerald C. Anderson, Kenneth F. Frank