Friction controllers
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United States of America Patent
Stats
-
Mar 9, 1982
Grant Date -
N/A
app pub date -
Jan 23, 1980
filing date -
Jan 30, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is concerned with the rapid release of frictional force which is acting to reduce relative movement between contacting surfaces, the normal actuating means being unaffected. One application is in an anti-lock braking system in vehicles, particularly motorcycles. A sensor monitors wheel angular velocity and when this falls below a predetermined value the sensor causes ultrasonic vibrations to be applied to brake pads effectively reducing friction without release of brake operating pressure to enable resumption of normal rotation. The invention can also be applied to friction clutches operating in either rotary or linear senses to cause release when overloading, overspeed, etc. occurs.
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