Patents by Inventor Donald Wade Johnson

Donald Wade Johnson 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).

  • Apparatus and method for sealing a damaged pipe
    Patent number: 5954095
    Abstract: A pipe sealing system comprising an insertion tool and a seal apparatus for providing sealing to a damaged pipe. The sealing apparatus includes a cover member and a tool attachment member. The insertion tool includes a handle having an outer tube and an inner shaft slidably positioned within the outer tube. Additionally, the insertion tool includes an attachment region associated with the inner shaft for releasably attaching the tool attachment member to the insertion tool. The attachment region enables releasable controlled positioning of the cover member within the outer tube of the handle. The invention further includes a method for repairing damaged pipes.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: September 21, 1999
    Assignee: Gas Reasearch Institute
    Inventors: Stephen Cecil Grigory, Jesse Abergo Villarreal, Jeffrey Gene Wright, Donald Wade Johnson
  • Apparatus and method for remotely sealing a damaged pipe
    Patent number: 5920976
    Abstract: A remote pipe sealing system comprising an insertion tool and a seal apparatus for providing sealing to a damaged pipe. The sealing apparatus includes a cover member and a tool attachment member. The insertion tool includes a guide member and a handle having an outer tube and an inner shaft slidably positioned within the outer tube. The guide member is slidably associated with the outer tube. Additionally, the insertion tool includes a member for releasably attaching the tool attachment member to the inner shaft of the handle. The releasable attachment member enables releasable controlled positioning of the cover member within the outer tube of the handle. The invention further includes a method for remotely repairing damaged pipes.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: July 13, 1999
    Assignee: Gas Research Institute
    Inventors: Stephen Cecil Grigory, Jesse Abergo Villarreal, Jeffrey Gene Wright, Donald Wade Johnson