Patents by Inventor Jon R. Jeffery

Jon R. Jeffery 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).

  • Fast actuator
    Patent number: 4697419
    Abstract: A hydraulic power actuator system flow augmentation scheme of the boot-strap type. The scheme consists of a jet pump to augment pump inlet flow with return flow by reducing the pressure in the jet pump below return pressure. A check valve is installed in the augmentation circuit to prevent back-flow during low flow rate conditions. Two load recovery check valves are used to short circuit the actuator during aiding load conditions.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: October 6, 1987
    Assignee: McDonnell Douglas Corporation
    Inventors: Jon R. Jeffery, Neil J. Pierce