Balanced bi-directional no-back mechanism

Abstract

Abstract A NO-BACK TYPE CLUTCH OR ANTI-FEED-BACK OR TORQUE TRANSMITTING MECHANISM IS DISCLOSED WHICH HAS TWO BRAKE SHOES NORMALLY URGED IN A DIRECTION TO ENGAGE A CYLINDRICAL BRAKE DRUM SURFACE, BUT SEPARTED FROM THE LATTER BY THE ACTION OF DRIVING PINS ON A POWER INPUT MEMBER. THE OUTPUT MEMBER HAS DRIVEN AND REACTION TRANSMITTING PINS EXTENDING BETWEEN THE BRAKE SHOES, AND IN RESPONSE TO AN EXCESSIVE TORQUE LOAD THE OUTPUT PINS SPREAD THE SHOES INOT BRAKING ENGAGEMENT WITH THE DRUM SURFACE, THUS LIMITING THE FEED BACK OF TORQUE TO THE INPUT, THE OUTPUT PINS REACT AGAINST THE SHOES ON A GREATER LENGTH MOMENT ARM THAN DO THE INPUT PINS, WITH A RESULTANT COUPLE-BALANCING EFFECT.

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