Automatic door operator

• US 3,129,936 A
• Filed: 12/23/1960
• Issued: 04/21/1964
• Est. Priority Date: 12/23/1960
• Status: Expired due to Term

• Current Assignee: Martin Carlson
• Original Assignee: Martin Carlson
• Inventors: Carlson, Martin
• Application Number:
  US04/078,086
• Time in Patent Office: 1,215 Days
• US Class Current: 49/264
• CPC Class Codes: E05F 15/53 for swinging wings
• CPC Class Codes: E05F 15/614 operated by meshing gear wheels, one of which being mounted at the wing pivot axis; operated by a motor acting directly on the wing pivot axis
• CPC Class Codes: E05F 3/106 with crank-arm transmission between driving shaft and piston within the closer housing
• CPC Class Codes: E05F 3/223 Hydraulic power-locks, e.g. with electrically operated hydraulic valves
• CPC Class Codes: E05Y 2900/132 Doors

Claims

1. A DOOR OPERATING MECHANISM COMPRISING A ROTATABLE SPINDLE ADAPTED TO SUPPORT A DOOR FOR SWINGING MOVEMENT AND TO HAVE A DRIVING CONNECTION THEREWITH, A NORMALLY TENSIONED SPRING IN DRIVING RELATION WITH SAID SPINDLE AND ADAPTED TO RELEASE ITS STORED ENERGY TO TURN SAID SPINDLE IN A DOOR OPENING DIRECTION, MOTOR MEANS FOR TURNING SAID SPINDLE IN A DOOR CLOSING DIRECTION AND LOADING SAID SPRING FOR A SUBSEQUENT DOOR OPENING OPERATION, LATCH MEANS FOR HOLDING SAID SPINDLE IN DOOR CLOSED POSITION AGAINST THE TENSION OF SAID SPRING, AND CIRCUIT MEANS FOR CONTROLLING