Patents by Inventor Kenneth R. Havard

Kenneth R. Havard 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).

  • Traveling valve for sucker rod pump
    Patent number: 5356114
    Abstract: The present invention provides a mechanically operated traveling valve for use in a sucker rod pump. The valve includes a cylindrical housing, a base positioned in the bottom of said housing which contains a first portion of a sliding shear seal, and a piston positioned within said housing above said base which contains a second portion of the sliding shear seal. The valve is operable between open and closed positions by reciprocal action of a sucker rod on the piston which opens and closes the sliding shear seal.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: October 18, 1994
    Assignee: Mash Oil Tools, Inc.
    Inventor: Kenneth R. Havard