B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
B66B 13/02 (2006.01) B66B 13/30 (2006.01) E06B 5/00 (2006.01) E06B 9/08 (2006.01)
Patent
CA 2564586
The present invention provides an elevator door system (1) comprising, a motor (12), a vertical axis (10), a door (2) attached at a first end to the vertical axis for winding and unwinding thereupon. Force transmission means (14) interconnect a second end of the door (2) and compensation means (20) whereby the motor (12) simultaneously drives the vertical axis (10) and the compensation means (20) and wherein the compensation means (20) has variable diameter. In use, as the door (2) is unwound from the vertical axis (10), the force transmission means (14) is simultaneously wound upon the compensation means (20). Hence, not only is a thrust exerted on the door (2) by the vertical axis (10) but a drag is exerted thereupon by the force transmission means (14). Furthermore, the compensation means (20) has a variable diameter to compensate for, amongst other things, the changes in the diameter the door (2) wound on the vertical axis (10). Hence, the tension in the force transmission means (14) and the door (2) can be kept substantially constant during operation.
Ag Inventio
Riches Mckenzie & Herbert Llp
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