Brake apparatus for automatic door
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 6, 1987
Grant Date -
N/A
app pub date -
Apr 10, 1985
filing date -
Apr 16, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Family
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Cited Art Landscape
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