Patents by Inventor Louis J. Roussel

Louis J. Roussel 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).

  • Anti rotational device for down hole hydraulic pumping unit
    Patent number: 4637459
    Abstract: An anti rotational device is illustrated for use in a down hole pumping unit operated by a sucker rod driven by a hydraulic pump, fixing the cylinder rod of the hydraulic pump while permitting rotation of the sucker rod driven thereby.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: January 20, 1987
    Inventor: Louis J. Roussel