Patents by Inventor Richard Easter

Richard Easter 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).

  • Power-assist door closer
    Patent number: 4995194
    Abstract: An hydraulic door closer has a motor/pump component to assist opening the door by supplying oil under pressure to the closer cylinder. The component is activated by a switch sensitive to the turning of the closer pinion shaft as the door is moved out of its frame. Further, the distance which the door must move until the switch activates the motor/pump component is adjustable. The hydraulic circuitry is conveniently embodied in a single manifold block.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: February 26, 1991
    Assignee: Yale Security Inc.
    Inventors: Eckart F. Schultze, Richard Easter, Robert V. Funderburk