Patents by Inventor Stanley J. Hoffman, Jr.

Stanley J. Hoffman, Jr. 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 single-stage servovalve
    Patent number: 4442855
    Abstract: A single-stage servovalve has a movable member operatively arranged to selectively divide a continuously-discharged fluid jet between two receiver passages. The hydraulic output of the valve is the differential between the conditions in the receivers. In the event of a hard-over failure of the control system of which the servovalve is a part, a jet deflector surface becomes operative to create a substantially balanced hydraulic condition in the receiver passages, thus terminating control.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: April 17, 1984
    Assignee: Moog Inc.
    Inventors: Stanley J. Hoffman, Jr., William D. Waffner