Patents by Inventor William B. Gamper

William B. Gamper 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).

  • Collapsible crutch
    Patent number: 5765583
    Abstract: A self-adjusting crutch having a floating and moveable central leg. A prepositionable height fastener cooperates with a coupling collar, both of which are disposed on the central leg to predetermine the amount of extension. A fastener and coupler cooperate, for the leg to be extended and retracted repeatedly the exact same distance. The floating moveable leg can be releasably retained within the arm piece.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: June 16, 1998
    Inventor: William B. Gamper
  • Self-adjusting collapsible crutch
    Patent number: 5025820
    Abstract: A self-adjusting crutch containing a central portion having both a fixed and a moveable central post, one of which nests within the other. A prepositionable height fastener cooperates with a coupling collar, both of which are disposed on the central portion to predetermine the amount of extension. When the fastener and coupler are in cooperation, the leg can be extended and retracted repeatedly the exact same distance.An improved hand grip is also disclosed.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: June 25, 1991
    Inventor: William B. Gamper