Device for operating a closure element moving at least approxima

Details Device for operating a closure element moving at least approxima Device for operating a closure element moving at least approxima

1996-10-15

1998-09-08

Lorence, Richard M.

Flexible or portable closure, partition, or panel

Roll type

With rotating means

160 8, 192 551, E06B 972, E06B 962

Patent

active

058031502

ABSTRACT:
The operating device comprises a drive shaft (1) driven by a geared motor unit (4) via a transmission mechanism allowing the closure element being lowered to be disengaged when a resistive force opposes the lowering thereof. The device has no brake. By contrast, it comprises a spring (8) for compensating for the weight of the closure element and the transmission mechanism (6) consists of a friction coupling and, possibly, of a one-way coupling mechanism.
The absence of a brake and the weight compensation make it possible for the closure element to be raised easily and quickly by hand in an emergency, while the friction coupling allows the closure element to be driven downward by the motor.

REFERENCES:
patent: 4615371 (1986-10-01), Clauss
patent: 4887660 (1989-12-01), Kraus
patent: 5105871 (1992-04-01), Baud et al.

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