Patents by Inventor MalColm Derek Pitman

MalColm Derek Pitman 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).

  • Overshot tool
    Patent number: 7617867
    Abstract: An overshot tool includes a grapple, a torque sub rotationally fixed to the grapple and a deformable member in operable communication with the torque sub. The torque sub is responsive to torsional movement thereof. A method for retrieving a fish with the tool is also included.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: November 17, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Gerald D. Lynde, MalColm Derek Pitman
  • Overshot tool
    Publication number: 20080217014
    Abstract: An overshot tool includes a grapple, a torque sub rotationally fixed to the grapple and a deformable member in operable communication with the torque sub. The torque sub is responsive to torsional movement thereof. A method for retrieving a fish with the tool is also included.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 11, 2008
    Inventors: Gerald D. Lynde, MalColm Derek Pitman