Patent ID: 7583040

Claim:
A closure operating device for opening and closing an overhead closure, the closure operating device comprising: a motor operatively connected to an output shaft for rotation thereof, said output shaft being adapted to drive said closure for displacement thereof along a travel path between open and closed limit positions; a sensing system having a controller operable to at least one of stop and open the closure upon detection of the presence of an obstacle obstructing the travel path of said closure; a control system in communication with said motor and said controller of said sensing system, said control system including a control unit operable to deactivate said sensing system at a selected point prior to said closed limit position of said closure; at least one switch in communication with said control system and actuable by a switch actuator, the switch actuator being displaceable along the output shaft and operable to actuate said switch when disposed in a predetermined position therealong; and wherein the control system determines the closed limit position of the closure without switch input and based solely on a calculated delay period following the actuation of said switch, and allows said delay period to expire following actuation of said switch before stopping said motor to immobilize the closure in said determined closed limit position.