Patents by Inventor Lawrence W. Shumaker

Lawrence W. Shumaker 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).

  • Circuit for a power operated machine
    Patent number: 4195722
    Abstract: A circuit interconnecting a source of electrical energy with a power operated machine. The circuit comprises an interlock device including a motion switch which is adapted to be removably attached to the machine operator's body. The motion switch is movable between a normally deactivated position to prevent the flow of electrical energy from the source to the machine and an activated position to permit the flow of electrical energy from the source to the machine for operating the machine. The motion switch is operable to be moved to the activated position in response to movement of the operator's body.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: April 1, 1980
    Assignee: Outboard Marine Corporation
    Inventors: Larry L. Anderson, Lawrence W. Shumaker, Russell J. Van Rens