Patents by Inventor David L. Bump

David L. Bump 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).

  • Wellhead stuffing box for polished rod and accessories for same
    Patent number: 5141052
    Abstract: A wellhead stuffing box for a polished rod includes a body with an elongated opening extending through it to receive the polished rod. Packing in the body makes a sliding seal around the polished rod and a static seal against the interior of the body. Internal pushers are provided for compressing the packing with the required force for appropriate sealing, and the internal pushers cannot be changed without disassembling the body.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: August 25, 1992
    Inventor: David L. Bump
  • Wellhead stuffing box for polished rod and accessories for same
    Patent number: 5137083
    Abstract: A wellhead stuffing box for a polished rod includes a body with an elongated opening extending through it to receive the polished rod. Packing in the body makes a sliding seal around the polished rod and a static seal against the interior of the body. Internal pushers are provided for compressing the packing with the required force for appropriate sealing, and the internal pushers cannot be changed without disassembling the body.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: August 11, 1992
    Inventor: David L. Bump