Drive for closure elements

Machine element or mechanism – Gearing – Directly cooperating gears

Reexamination Certificate

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Details

C073S650000, C250S231120

Reexamination Certificate

active

10280666

ABSTRACT:
A drive for closure elements is provided, in particular in the area of garage and industrial doors, but also for example in the form of roller shutters, with a reference value generator arranged in the motor or in the gearing of the drive for determining the actual position of the closure element. When a reference point position is reached, the reference value generator emits a signal or causes a signal modification, on the basis of which the actual-value generator can be calibrated. The reference value generator has two reference discs rotating in different speeds, which, in predetermined angular positions to one another, define the reference point positions which can be scanned by at least one scanning device.

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patent: 5852413 (1998-12-01), Bacchi et al.
patent: 6184518 (2001-02-01), Klein
patent: 6946649 (2005-09-01), Uenaka et al.
patent: 6981423 (2006-01-01), Discenzo
patent: 2004/0050178 (2004-03-01), Parkinson
patent: 2005/0087683 (2005-04-01), Kawai et al.
patent: 3801245 (1988-08-01), None
patent: 19638501 (1998-04-01), None
patent: 98/23921 (1998-06-01), None

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