Patents by Inventor Edward W. Varney

Edward W. Varney 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).

  • Fail-safe actuator for rotary valves
    Patent number: 4533114
    Abstract: An actuator for a rotary valve includes a fail-safe mechanism for automatically opening or closing the valve upon the occurrence of a predetermined condition. The actuator also includes a mechanism for permitting the manual operation of the valve from the open to closed position, and vice versa, and to a continuum of positions between the open and closed positions even when the fail-safe mechanism is activated. A biased clutch activates the fail-safe mechanism and also couples a worm-gear drive for effecting the manual operation of the valve.
    Type: Grant
    Filed: February 8, 1983
    Date of Patent: August 6, 1985
    Assignee: Posi-Seal International, Inc.
    Inventors: John M. Cory, Edward W. Varney, Jon A. Babcock, Andrew Pupillo