Patents Assigned to United Elevator Corporation
  • Actuating assembly for hydraulic elevators
    Patent number: 4996906
    Abstract: An actuating assembly having a cylinder which receives a plunger defining a fluid restricting means along its lower end. A feed conduit delivers pressurized fluid through a fluid inlet and into the cylinder, which displaces the plunger out of the cylinder. As the plunger is displaced, the fluid restricting means progressively covers the fluid inlet, progressively restricting the rate of fluid flow into the cylinder, and slowing the plunger's displacement.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: March 5, 1991
    Assignee: United Elevator Corporation
    Inventors: Wallace A. Hanson, Jeff Newman