Patents by Inventor William J. Happel

William J. Happel 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).

  • Method and apparatus for controlling a walking beam pump
    Patent number: 5204595
    Abstract: Method for controlling an electric drive motor coupled to a reciprocating mechanical system such as an oil well walking beam pump by inserting a pair of power-off pulses in a reciprocation period of the pump motor energization cycle, with one pulse in a top-of-cycle region and the other pulse in a bottom-of-cycle region to reduce rod stress and motor electrical power consumption and increase pump displacement and efficiency.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: April 20, 1993
    Assignee: Magnetek, Inc.
    Inventors: Kenneth E. Opal, William J. Happel