Easy opening door control device

Details Easy opening door control device Easy opening door control device

E - Fixed Constructions

05

F

E05F 15/12 (2006.01) E05F 1/10 (2006.01) F03G 1/00 (2006.01)

Patent

CA 2070446

ABSTRACT: A device for controlling swinging doors utilizing an externally powered motor to compress a spring during door opening to store energy in the spring. The motor is not used to open the door, but only to compress the spring, thereby utilizing a minimum amount of electrical energy and allowing for a very easy opening of the door. The motor acts as a generator during the closing of the door with the generated electrical energy fed back to the motor to retard rotation of the rotor, providing a brake on the closing movement of the door. The feedback circuitry includes a switch for varying the braking during the final degrees of closing movement as well as a variable setting device allowing control of braking force. May 21, 1992 (994) c:\890\specs\p920089.pct

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