Patents by Inventor Gerald W. Pippin

Gerald W. Pippin 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).

  • Pump control responsive to voltage-current phase angle
    Patent number: 5362206
    Abstract: A pump-off controller checks for pump-off by examining the relative phase relationship between AC voltage and AC current supplied to an inductive, alternating current, electric motor driving a cyclically operated mechanical system having a walking beam for raising and lowering a subsurface pump by means of a string of sucker rods. When the phase angle between AC voltage supplied to the motor and AC current drawn by the motor exceeds a predetermined value at selected points or regions of the pumping stroke, the pumping system is shut down for a predetermined time.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: November 8, 1994
    Assignee: Automation Associates
    Inventors: G. Wayne Westerman, Richard C. Montgomery, Gerald W. Pippin