Braking device for shutter for building

Details Braking device for shutter for building Braking device for shutter for building

1997-09-25

2000-05-09

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Roll type

With brake or stop

160 8, E05F 1520

Patent

active

060590084

ABSTRACT:
A device for preventing a shutter curtain from falling by its own weight and allowing the shutter curtain to descend in a braked manner, is provided such that separate space for the device does not need to be provided.
A viscous clutch 9, which provides braking to the rotation of a winding shaft rotating in the direction of closing during the shutter curtain 2 descending by its own weight, is provided between the winding shaft 7 and a bracket 5 of the building. Further, the viscous clutch is arranged to be smaller in diameter than the innermost inner diameter of the shutter curtain wound onto the winding wheel 4, thus fitting within the wound shutter.

REFERENCES:
patent: 4112996 (1978-09-01), Fohl
patent: 4838333 (1989-06-01), Mottura
patent: 5443109 (1995-08-01), Benthin
patent: 5447477 (1995-09-01), Bresson et al.
patent: 5488983 (1996-02-01), Jung
patent: 5634507 (1997-06-01), Kwoka
patent: 5711360 (1998-01-01), Voitte
patent: 5799716 (1998-01-01), Yamaguchi et al.
patent: 5881849 (1999-03-01), Gassmann

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