Patents Represented by Attorney Richard T. Treacy

Find this attorney in the Justia Lawyer Directory

  • Automatic recycle control for hydraulic elevators with telescopic cylinders
    Patent number: 4043428
    Abstract: Apparatus for automatically sensing when an insufficient amount of fluid exists in a closed fluid power transmission system of a telescoping piston type hydraulic elevator system and circuitry shown interconnected with the control system of a typical hydraulic control system for automatically initiating a fluid restoration cycle to restore fluid to that closed fluid power transmission system to enable the system to operate in a desired manner.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: August 23, 1977
    Assignee: Otis Elevator Company
    Inventors: Lawrence Eugene White, Arthur Brantlyn Woolsey