Patent ID: 6325134
Filing Date: 2001-12-04
Classification: E05F,E05Y

Abstract:
An operating system for controllably moving a sectional door between open and closed positions comprising:a counter balancing system having a drive tube interconnected with the sectional door and an operator motor mounted adjacent to said drive tube;a drive train interconnecting said drive tube and said operator motor for selectively driving said drive tube for moving the sectional door between the open and closed positions, said operator motor having a drive shaft and said drive train including a drive gear mounted on said drive shaft and a driven gear mounted on said drive tube with said drive gear and said driven gear each having a pair of axially spaced spur gears;a coupler in said drive train selectively retractable from a driving position; anda remotely-actuated disconnect assembly operatively attached to said coupler, wherein said disconnect assembly retracts said coupler, whereby the sectional door may be manually moved toward either of the open position and the closed position.