Device for ensuring safety by preventing mechanically raised and

Details Device for ensuring safety by preventing mechanically raised and Device for ensuring safety by preventing mechanically raised and

1995-03-03

1996-09-03

Young, Lee

Brakes

Wheel

Axially movable brake element or housing therefor

188 727, 188346, 277 68, F16D 5514

Patent

active

055515355

ABSTRACT:
A device for ensuring safety by preventing mechanically raised and lowered components, roll-up gates for example, from crashing down when the motor or transmission fails. The device is characterized by a friction clutch. The friction clutch comprises a stationary half and a moving half. The stationary half is secured to the shaft inside a housing. The moving half is mounted on a base and can be electromagnetically displaced axially in relation to the base and against the stationary half. The force exerted by the moving half against the stationary half is augmented by resilient components that engage between the housing and the moving-half base.

REFERENCES:
patent: 4280073 (1981-07-01), Miller
patent: 4333550 (1982-06-01), Shirai
patent: 4445596 (1984-05-01), Waters et al.
patent: 4852890 (1989-08-01), Borowski
patent: 4913450 (1990-04-01), Asberg
patent: 5035436 (1991-07-01), Rockwood et al.
patent: 5186286 (1993-02-01), Lindberg

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