Patents by Inventor Randall M. Crippen

Randall M. Crippen 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).

  • Patent number: 5920048
    Abstract: A method and apparatus for actuating an electrical switch and providing a variable electrical resistance usable to sense displacement of a movable member. The apparatus includes a housing for receiving the electrical switch, a variable resistance element, and an actuator with a body member and a transverse cylindrical sleeve. An electrically conductive wiper is coupled to the actuator and contacts the variable resistance element, which varies with pivotal movement of the actuator. The body member is pivotably supported by an aperture of the housing about an axis of the cylindrical sleeve, and a spring member biases the actuator toward an initial position, wherein the actuator is pivotable against the bias of the spring to actuate the electrical switch and to provide the variable resistance by positioning the electrically conductive wiper along the variable resistance element.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: July 6, 1999
    Assignee: Illinois Tool Works Inc.
    Inventors: Randall M. Crippen, Earl J. Genz, Daniel J. Danek, Mario Orrico
  • Patent number: 5488209
    Abstract: A switch assembly for activation by a shaft or hinge pin of a hinge includes a cam member connected for rotation along with the shaft and an actuating band operably connected to the cam member. The actuating band includes an engagement portion for contact with a first portion of a lever upon rotational movement of the shaft of the hinge and the cam member. The lever is movable to enable a second portion of the lever to contact an electrical switch to in turn make or break contact of a desired electrical circuit formed by the electrical switch. A sealing insert is included to provide a substantially waterproof seal between the hinge shaft and the switch assembly.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: January 30, 1996
    Assignee: Illinois Tool Works Inc.
    Inventors: Mario M. V. Orrico, William J. Olson, James S. Zielinski, Randall M. Crippen