E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
E05B 47/00 (2006.01) E05B 65/12 (2006.01)
Patent
CA 2155657
A linear drive, particularly useful for locking or unlocking a door lock mechanism or the like permits manual operation by providing an output shaft that can move freely regardless whether the output shaft is in extended or retracted positions without back driving the motor. The output shaft is coaxially slideably situated over a worm gear shaft which moves a nut that is threadingly engaged therewith and moves inside the output shaft along the axial direction of the worm gear shaft. The output shaft is not threadingly engaged with the worm gear shaft. The output shaft thus is freely movable relative to the worm gear shaft, which results in essentially zero back drive of the worm gear shaft and the motor. To provide for manual operation, the nut is automatically moved back to its neutral position every time the output shaft is extended or retracted by a torsion spring or the like which can store energy therein. Whenever the motor is operated to drive the worm gear shaft, the spring gear is also rotated, which causes the spring to store energy therein. As soon as the motor is turned off,the energy stored in the spring causes the worm gear to rotate in the direction opposite to the last motor driven direction to move the nut to the neutral position it was in prior to energization of the motor.
Atoma International Inc.
C-Mac Invotronics Inc.
Gowling Lafleur Henderson Llp
LandOfFree
Linear motion drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Linear motion drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear motion drive will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1937428