Patents by Inventor Floyd J. Hill

Floyd J. Hill 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).

  • Differential drive
    Patent number: 5269728
    Abstract: A differential hoist and drive includes a differential escapement mechanism arranged mechanically between and in combination with a pair of direction turning members, such as pulleys. An endless loop of a flexible force transmitting element (cable, chain, strap, or the like) interconnects the direction turning members and the differential escapement. The load can be connected to either the differential escapement or the direction turning members with the other being anchored as a fixed member. The load is restrained from swinging or from other unintended movement. A turnbuckle or other suitable device provides for a desired pretensioning of the loop of flexible force transmitting element.
    Type: Grant
    Filed: February 11, 1992
    Date of Patent: December 14, 1993
    Assignee: Power Kinetics, Inc.
    Inventors: William E. Rogers, Floyd J. Hill