Controlled torque drive for a barrier operator

Details Controlled torque drive for a barrier operator Controlled torque drive for a barrier operator

2006-02-07

2006-02-07

Ip, Paul (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S445000, C318S467000, C318S266000

Reexamination Certificate

active

06995533

ABSTRACT:
A controlled torque drive for a motor of a barrier operator including a current sensor coupled to a current conducting path that is in series with the motor. The current sensor is configured to sense the current level in the current conducting path and provide a signal indicative of the current level in the current conducting path to a current controller that restricts the current level to the motor when an obstruction is encountered by the movable barrier. The current controller continues to restrict current to the motor for a period of time while the motor attempts to move the movable barrier through an obstruction. In variations, the current to the motor is limited by an analog current controller, and in other variations, current is limited by a digital current controller.

REFERENCES:
patent: 2751219 (1956-06-01), Dodge
patent: 3376489 (1968-04-01), Caputo
patent: 3498434 (1970-03-01), Richmond
patent: 3891909 (1975-06-01), Newson
patent: 4263536 (1981-04-01), Lee et al.
patent: 4369399 (1983-01-01), Lee et al.
patent: 4386398 (1983-05-01), Matsuoka et al.
patent: 5218282 (1993-06-01), Duhame
patent: 5557887 (1996-09-01), Fellows et al.
patent: 5747956 (1998-05-01), Lamm
patent: 6111374 (2000-08-01), Fitzgibbon et al.
patent: 6133703 (2000-10-01), Fitzgibbon et al.
patent: 6161438 (2000-12-01), Mullet et al.
patent: 6400112 (2002-06-01), Fitzgibbon et al.
patent: 6597138 (2003-07-01), Fitzgibbon
patent: 2 282 639 (1995-04-01), None
Search Report for British Patent Application GB0409097.3 completed Sep. 17, 2004.

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