Patents by Inventor Irving A. Hiller

Irving A. Hiller 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).

  • Hydraulic tie-down for elevators
    Patent number: 4522285
    Abstract: A compensating rope sheave tie-down uses a hydraulic control system comprising various valves to control sheave motion. The sheave is permitted by the control system to move up and down slightly at slow rates, but is held in place if a high rate occurs. The control also permits the sheave to drop down to apply tension to the compensating rope.
    Type: Grant
    Filed: October 20, 1983
    Date of Patent: June 11, 1985
    Assignee: Otis Elevator Company
    Inventors: John K. Salmon, Irving A. Hiller