Patent ID: 9273508
Filing Date: 2016-03-01
CPC Classification: E05F,E05Y,E06B

Claim Text:
1. A garage door opening module comprising: a power unit having a rotatable output drive, the power unit being adapted to move a garage door when the power unit is used in conjunction with the garage door; an endless transmission drive adapted to transfer movement from the rotatable output drive to a door drive; a locking mechanism adapted to manually lock the garage door in a closed position, the locking mechanism causing an increased tension in the endless transmission drive when the power unit moves the garage door while the locking mechanism manually locks the garage door in the closed position; and a sensor mechanism positioned along the endless transmission drive and adapted to sense a transmission drive slack, the sensor being in a non-actuated state when the tension of the endless transmission drive is below a transmission drive slack displacement threshold and being actuated when the tension in the endless transmission drive is increased to reach the transmission drive slack displacement threshold due to the power unit moving the garage door while the locking mechanism manually locks the garage door in the closed position, the sensor mechanism stopping a movement of the door drive when in the actuated state.