초록 ▼

An operator (10) for moving in upward and downward directions a sectional door (D) having a counterbalancing system (30) including a drive tube (31) interconnected with the door including, a reversible motor (40), a drive shaft (50) selectively driven in two directions by the motor, a drive gear (61

An operator (10) for moving in upward and downward directions a sectional door (D) having a counterbalancing system (30) including a drive tube (31) interconnected with the door including, a reversible motor (40), a drive shaft (50) selectively driven in two directions by the motor, a drive gear (61) freely rotatably mounted on the drive shaft, a driven gear (65) mounted on the drive tube and operatively engaging the drive gear, a disconnect assembly (70) having a spool (71) rotatable with the drive shaft and movable into and out of engagement with the drive gear for selectively connecting and disconnecting the motor and the drive tube, and an actuating mechanism (80) normally maintaining said spool in engagement with the drive gear and biasing the spool out of engagement with the drive gear when released to permit independent movement of the door.

대표청구항 ▼

[ What is claimed is:] [1.]1. An operator system for moving in upward and downward directions a sectional door comprising, a door, a counterbalancing system including a drive tube interconnected with said door, a reversible motor, a drive shaft selectively driven in two directions by said motor, a d

[ What is claimed is:] [1.]1. An operator system for moving in upward and downward directions a sectional door comprising, a door, a counterbalancing system including a drive tube interconnected with said door, a reversible motor, a drive shaft selectively driven in two directions by said motor, a drive gear freely rotatably mounted on said drive shaft, a driven gear mounted on said drive tube and operatively engaging said drive gear, a disconnect assembly having a spool rotatable with said drive shaft and movable into and out of engagement with said drive gear for selectively connecting and disconnecting said motor and said drive tube, and an actuating mechanism maintaining said spool normally biased into engagement with said drive gear and biasing said spool out of engagement with said drive gear when released to permit independent movement of said door.