Brake apparatus for automatic door

Details Brake apparatus for automatic door Brake apparatus for automatic door

1985-04-10

1987-10-06

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

318261, 318266, 318265, G08B 2100

Patent

active

046986227

ABSTRACT:
A brake apparatus for automatic doors including a speed pulse signal output device for providing speed pulse signals at a time interval inversely proportional to the door speed of an automatic door, a brake for slowing the door speed, a braking position detector for detecting braking position when the brake starts braking, a brake effect measurer for measuring the effect of the brake and a braking power controller for adjusting the braking power of the brake in accordance with the measured braking effect whereby the motion of the door is kept constant irrespective of the door weight and other conditions.

REFERENCES:
patent: 4145641 (1979-03-01), Ozaki
patent: 4203058 (1980-05-01), Chen
patent: 4401929 (1983-08-01), Odaka et al.
patent: 4429264 (1984-01-01), Richmond
patent: 4449078 (1984-05-01), Ogishi et al.
patent: 4498033 (1985-02-01), Aihara et al.
patent: 4563625 (1986-01-01), Kornbrekke et al.

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