Door check and closure device

• US 4,048,695 A
• Filed: 11/20/1975
• Issued: 09/20/1977
• Est. Priority Date: 11/20/1975
• Status: Expired due to Term

• Current Assignee: Donald R. Juilfs, Otto H. Juilfs
• Original Assignee: Donald R. Juilfs, Otto H. Juilfs
• Inventors: Juilfs, Donald R., Juilfs, Otto H.
• Primary Examiner(s): Schroeder, Werner H.
• Assistant Examiner(s): Berman, Conrad L.
• Application Number:
  US05/633,819
• Time in Patent Office: 670 Days
• Field of Search: 16/63, 16/64, 16/65, 16/82, 16/DIG. 10
• US Class Current: 16/65
• CPC Class Codes: E05F 3/223 Hydraulic power-locks, e.g. with electrically operated hydraulic valves
• CPC Class Codes: E05Y 2900/132 Doors
• CPC Class Codes: Y10S 16/10 Spring actuated checks and closers

Abstract

This invention relates to a door closer and holder having a longitudinally movable rod containing a niche which rests against a stop plate to hold the door in an open position. A rotating cam is positioned adjacent the niche in the rod so that further movement of the rod in a longitudinal matter rotates the cam causing the rod to ride over and bypass the stop plate allowing the door to close.

Claims

1. A door closure device comprising a cylindrical shell, a spring disposed within said shell, a piston rod adapted to interact with said spring for resisting the opening of a door and for causing closing of a door, a slot disposed longitudinally in said rod, a plate fixedly mounted in said shell against which one end of the spring rests, a slot cut into said plate, a key within said slot which is adapted to engage a niche in said rod to hold a door in an open position, a rotatable cam rotatably mounted within the slot in the rod adapted to allow the key to override the niche in said rod to allow a door to close.

2. The device of claim 1 wherein a spring biases said key in the direction of said rod.

3. The device of claim 1 comprising a leaf spring to resist rotation of said cam.