Motorized operator for doors

An operator for moving in upward and downward directions a sectional door having a counterbalancing system including a drive tube interconnected with the door comprising, a reversible motor, a drive shaft selectively driven in two directions by said motor, a drive gear mounted on said drive shaft, a driven gear mountable on the drive tube and engaging said drive gear, a drive wheel on said drive shaft for rotating said drive gear in one direction when said motor rotates said drive shaft in one direction, and a coupler on said drive shaft rotating said drive wheel when located in a first position and directly engaging and rotating the drive gear in the other direction when located in a second position, said drive wheel having rachet teeth engaging pawls on said drive gear for rotating said drive gear in said one direction and for permitting free rotation of said drive gear relative to said drive wheel when said drive gear is rotated in said other direction.

An operator for moving in upward and downward directions a sectional door having a counterbalancing system including a drive tube interconnected with the door comprising, a reversible motor, a drive shaft selectively driven in two directions by said motor, a drive gear mounted on said drive shaft, a driven gear mountable on the drive tube and engaging said drive gear, a drive wheel on said drive shaft for rotating said drive gear in one direction when said motor rotates said drive shaft in one direction, and a coupler on said drive shaft rotating said drive wheel when located in a first position and directly engaging and rotating the drive gear in the other direction when located in a second position, said drive wheel and said drive gear being freely rotatably mounted relative to said drive shaft.

An operating system for controllably moving a sectional door between open and closed positions in relation to a door frame having a pair of jambs and an interconnecting header comprising, a counterbalancing system having a drive tube interconnected with the sectional door proximate the ends thereof, a motorized operator mounted adjacent to said drive tube, a drive train interconnecting said drive tube and said motorized operator for selectively driving the sectional door in upward and downward directions, and coupler means in said motorized operator retractable from a driving position when the sectional door is stopped by an object intermediate the open and closed positions, whereby the sectional door may be manually moved toward either of the open position and the closed position.

An operator for moving in upward and downward directions a sectional door having a counterbalancing system including a torsionally-loaded drive tube interconnected with the door comprising, a motorized drive mechanism for selectively rotating a drive shaft in two directions, a gear train interconnecting said drive shaft and the drive tube, a first drive mechanism operable upon rotation of said drive shaft in one direction for rotating said gear train to drive the sectional door in one direction, and a coupler selectively movable into direct engagement with said gear train to drive the sectional door in the other direction when said drive shaft is rotated in the other direction.

An operator for moving in upward and downward directions a sectional door having a counterbalancing system including a drive tube interconnected with the door comprising, a reversible motor, a drive shaft selectively driven in two directions by said motor, a drive gear mounted on said drive shaft, a driven gear mountable on the drive tube and engaging said drive gear, drive wheel means on said drive shaft for rotating said drive gear in one direction when said motor rotates said drive shaft in one direction, and means on said drive shaft for rotating said drive wheel when located in a first position and for directly engaging and rotating the drive gear in the other direction when located in a second position.