Patents by Inventor John R. Hock

John R. Hock 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: 4252491
    Abstract: A hoist for loading and unloading cargo through a side or rear doorway of a van or truck slides from a stored position completely inside the vehicle to an operating position with a lift platform outside the vehicle that can be lowered and raised by an electric winch connected to the platform by cables. The hoist has a pair of generally horizontal telescoping parallel beams guiding a sliding yoke movable by means of the winch to raise and lower the platform through cable runs secured to arms extending from posts at both sides of the platform. Pivoting side support beams cooperating with stop members upon extension to operating position, and other safety features prevent improper operation. If very heavy loads are to be lifted on to a small vehicle, it may be desirable to brace the vehicle, as by means of a jack at or near the location of the lift platform to avoid tilting the vehicle.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: February 24, 1981
    Assignee: Jelco Service Co., Inc.
    Inventor: John R. Hock