Patent ID: 8006819
Filing Date: 2011-08-30
Classification: F16D,F16F

Abstract:
1. An overrunning accessory decoupler, comprising: a hub configured to be mounted on a shaft; a pulley rotatably mounted on said hub; an isolator spring acting between the pulley and the hub to dampen torsional vibrations therebetween; a one-way clutch acting between the pulley and the hub to permit torque to be transferred therebetween in a first rotational sense and to inhibit the transfer of torque therebetween in a second rotational sense, opposite said first sense; and a locking mechanism movable between a lock position and an unlock position and operable to couple and uncouple the pulley to the hub to selectively permit the transfer of torque in the second rotational sense; wherein the locking mechanism does not lock the hub to the pulley in the first rotational sense wherein the locking mechanism is biased to the lock position and is moved to the unlock position by centrifugal force overcoming the bias, the centrifugal force being developed by rotation of the pulley.