Patents Assigned to Elmer E. Jones
  • Door and window closer
    Patent number: 4003102
    Abstract: A spring or gravity motor having an override mechanism for a movable window or door including a pneumatic cylinder, a piston, a check valve admitting air to the cylinder, an override valve permitting pressure dumping of the air in the cylinder during movement of the door or window at a speed greater than the normal closing speed by the motor.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: January 18, 1977
    Assignee: Elmer E. Jones
    Inventors: Nathaniel L. Hawks, John R. Shively