Patents by Inventor Walter R. Shaw

Walter R. Shaw 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).

  • Artificial lifting device for well fluids using a continous loop
    Patent number: 6158515
    Abstract: Fluid is lifted from a well with a continuous loop of fibrous material, such as rope. The rope loop is formed around a drive sheave on the surface with a return sheave down inside of the well. The drive sheave has ridges along the side surfaces of a groove. The rope lays in the groove in contact with the ridges. A motor rotates the drive sheave so as to lift the oily rope from the well. Guides and wipers are provided to direct the rope into the drive sheave and to the wipers. The wipers are slotted cards that scrape a quantity of oil from the outside surface of the rope. The oil falls down into a bottom of a housing for collection purposes.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: December 12, 2000
    Assignee: Lift Systems LLC
    Inventors: Richard H. Greer, Herbert W. Markwardt, Stephen B. Markwardt, Walter R. Shaw, John R. Watson