Patents by Inventor R. Bruce McIntosh

R. Bruce McIntosh 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: 4884783
    Abstract: A compact, lightweight, electrically powered hoist with a drum used for hoisting or lowering a payload. A vertically oriented reversible motor is controlled by a control pendant with a momentary switch to drive a helical gear reduction and a worm gear reduction. A worm shaft and a drum shaft wind wire rope on a drum. A one-way clutch and a brake on a driven shaft free-wheel during hoisting operations. A clutch and brake hold the payload in a hoisted position. Lowering of the hoisted payload is accomplished by reversal of the motor, and driving a shaft and clutch against the torque of the engaged brake. A wire rope with a swaged fitting is anchored to the drum by engagement in a keyhole. The hoist may be mounted horizontally, vertically or on a ceiling.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: December 5, 1989
    Assignee: Thorn, Inc.
    Inventors: R. Bruce McIntosh, Royal G. Thern