Patents by Inventor Fred Stansfield

Fred Stansfield 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).

  • Bolt tightening apparatus and method
    Patent number: 4012826
    Abstract: Apparatus for pre-tensioning a series of screwthreaded fasteners comprising an even number of such fasteners arranged on a common pitch circle, the apparatus including a ring member adapted to apply pre-tensioning forces to alternate fasteners by way of adaptors applied to said fasteners, the ring member being supported above the remaining fasteners by way of respective hydraulic piston and cylinder arrangements.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: March 22, 1977
    Assignee: Doncasters Moorside Limited
    Inventor: Fred Stansfield