Patents by Inventor Jarvis J. M. Yeh

Jarvis J. M. Yeh 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: 4912921
    Abstract: An emergency on board power source (28) for jet aircraft having high (22) and low speed (14) spools is disclosed for operation above altitudes where auxiliary power units (14) are operational. A power takeoff (56) is provided from the low speed spool of the jet engine to drive an emergency power unit (28) for supplying electrical and/or hydraulic on board power to the aircraft to maintain control during emergency conditions during which the auxiliary power unit is not operational or is not operational to supply sufficient power to maintain hydraulic or elecrical on board power to uninterruptible electrical and hydraulic power loads.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: April 3, 1990
    Assignee: Sundstrand Corporation
    Inventors: John N. Rice, Jarvis J. M. Yeh