Abstract: A power door system for actuating door panels between closed and opened positions. An operator arm telescopically supports a push rod. A housing is secured to the operator arm. A spring pin extends through apertures in the arm and the push rod. A release cable extends from the housing and is movable to retract the pin, permitting inter-telescoping motion of the push rod relative the operator arm, in turn permitting manual displacement of the doors. A compression spring supported within the housing influences the pin into engagement with the operator arm and push rod. A locking pin and guide is incorporated into a cable mounting guard below the spring pin, the locking pin displacing with the spring pin to a retracted position in response to actuation of the release cable, a successive actuation of the release cable releasing the spring pin and lock pin to reengage the apertures in the arm and the push rod.

Abstract: A release for a power door system for actuating door panels between closed and opened positions. A linkage includes an operator arm telescopically supporting a push rod. A housing is secured to the operator arm. A pin extends through apertures in the arm and the push rod. A release cable extends from the housing and, in response to displacement, causes the pin to retract, permitting inter-telescoping motion of the push rod relative the operator arm, in turn permitting manual displacement of the doors. A compression spring supported within the housing influences the pin into engagement with the operator arm and push rod. A locking pin and guide is incorporated into a cable mounting guard below the spring pin, the locking pin displacing with the spring pin and preventing return displacement of the spring pin in response to a single pull retraction of the spring pin.

Abstract: A fall arrestor for use with a vertical lift door includes a pair of latching dogs selectively pivoted into and out of contact with a vertical rail by cam members and a compression mechanism actuated by a change in tension between a lift cable and the vertical lift door. The fall arrestor further includes a ground locking system for locking the door when the vertical lift door is completely closed. The fall arrestor is capable of preventing of free fall of the vertical lift door in a catastrophic failure of a lift mechanism or the lift cable.