Patents by Inventor Stuart E. Larsen

Stuart E. Larsen 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).

  • Collision safety device having a breakaway shear coupling
    Patent number: 7056056
    Abstract: A collision safety device having a breakaway coupling. The collision safety device comprises first and second post segments. A first shear plate is attached to the first post segment and a second shear plate is attached to the second post segment. The first shear plate has a first contact surface and the second shear plate has a second contact surface opposite the first contact surface. The first and second shear plates are releasably attached by a breakaway coupling including a band. Friction between the shear plates and strength of the band are adjustable such that the upper post is released from the lower post when subjected to a pre-selected collision force.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: June 6, 2006
    Inventors: Kenneth E. Wiegand, Stuart E. Larsen