Patents by Inventor Vincent M. Demarest

Vincent M. Demarest 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).

  • Vehicle crash barriers
    Patent number: 4638979
    Abstract: A vehicle crash barrier is designed to provide a progressively increasing resistance to impact. In one embodiment a rail (12) is mounted on upright posts (10) by means of dual connecting elements (13,14) the rear elements (13) being of rectangular box section and relatively stiff while the front elements (14) are of hexagonal cross-section and therefore more easily deformed. Some of the web pairs (16A,16B) of the hexagonal section are inclined to the direction of thrust. In another example the beam assembly includes two rails (20,21) the lower rail positioned forwards of the upper rail and mounted on dual collapsible connections (24,25) while the upper rail (20) is carried by relatively stiff connections (23).
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: January 27, 1987
    Inventor: Vincent M. Demarest
  • Fencing section
    Patent number: D257177
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: September 30, 1980
    Inventor: Vincent M. Demarest
  • Timber fencing with guardrail
    Patent number: D270285
    Type: Grant
    Filed: February 11, 1981
    Date of Patent: August 23, 1983
    Inventor: Vincent M. Demarest