Safety device for electric window openers

Details Safety device for electric window openers Safety device for electric window openers

1993-07-02

1996-11-26

Redman, Jerry

Movable or removable closures

Safety means responsive to obstruction to closure

Closure drive stopping or reversal

49349, E05F 1502

Patent

active

055773478

ABSTRACT:
This device comprises mechanical link including a pawl (25) establishing a rigid drive link between a driving input member (2) and an output member (22), interacting with a prestressed element (31) which tends to hold the pawl in connection with the driving input member or with the driven output member, for so long as the force transmitted by the pawl remains below a predetermined value; this system automatically interrupts the kinematic drive chain of the movable member in the case of a force exceeding a predetermined value. This arrangement makes the device practically insensitive to friction and eliminates the uncertainty on the threshold of the triggering force.

REFERENCES:
patent: 2047712 (1936-06-01), Monroe
patent: 2649300 (1953-08-01), Launder
patent: 2817512 (1957-12-01), Christen
patent: 2883183 (1959-04-01), Fansterwalder et al.
patent: 3742646 (1973-07-01), Piech

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