Patents by Inventor Gene Hugh Sherwin

Gene Hugh Sherwin 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).

  • Jetting pig
    Patent number: 5875803
    Abstract: A conduit cleaning jetting pig is provided, the pig having a central axis that can be aligned with a central axis of a conduit to be cleaned, the pig including: a seal means having an upstream side and a downstream side, the seal means effective to prevent a significant flow of fluids from the upstream side of the pig to the downstream side of the pig between the pig and the inside of the conduit when a differential pressure exists between the upstream side and the downstream side of the pig; a rotating element rotatably connected to the downstream side of the seal means; a plurality of nozzles connected to the rotating element each nozzle defining a flowpath through the nozzle for fluids to pass through each of the nozzles, and the flowpath in communication with a channel from the upstream side of the seal means to the flowpath with the flowpath through the nozzle aligned in part tangential to a cylinder around the central axis of the pig and aligned in part toward the inside wall of the conduit; and a frict
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: March 2, 1999
    Assignee: Shell Oil Company
    Inventors: Alan Dale Leitko, Gene Hugh Sherwin, Joe Oscar Esparza