Patents by Inventor William Hugh Frey

William Hugh Frey 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).

  • Variable curvature tube and draw die therefor
    Patent number: 7475706
    Abstract: A tube is bent having a curved portion with a variable radius extending between first and second ends. The curved portion includes a circular arc portion with a constant radius and a clothoid transition portion with a variable radius. The circular arc portion extends from the first end toward a point of integration. At the point of integration, the circular arc portion merges with the transition portion. The transition portion extends from the point of integration to the second end. As the transition portion extends from the point of integration, its radius of curvature increases over its arc length, thereby, improving the quality of the bent tube by gradually bending the tube over a longer distance, thereby reducing local stresses on the bent portion of the tube.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: January 13, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: David A. Field, William Hugh Frey
  • Variable curvature tube and draw die therefor
    Patent number: 7290421
    Abstract: A tube is bent having a curved portion with a variable radius extending between first and second ends. The curved portion includes a circular arc portion with a constant radius and a clothoid transition portion with a variable radius. The circular arc portion extends from the first end toward a point of integration. At the point of integration, the circular arc portion merges with the transition portion. The transition portion extends from the point of integration to the second end. As the transition portion extends from the point of integration, its radius of curvature increases over its arc length, thereby, improving the quality of the bent tube by gradually bending the tube over a longer distance, thereby reducing local stresses on the bent portion of the tube.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: November 6, 2007
    Assignee: General Motors Corporation
    Inventors: David A. Field, William Hugh Frey