Patent ID: 6584917
Filing Date: 2003-07-01
Classification: A47B

Abstract:
A device for controlling rotation of a shaft, which comprises:(a) a fixed hub fixably mounted on the shaft; (b) a rotatable hub rotatably mounted on the shaft; (c) a wrap spring releasably mounted around the fixed hub and the rotatable hub; (d) a stop mounted adjacent the rotatable hub to limit rotation of the rotatable hub; (e) a release lever movably mounted adjacent the wrap spring such that the release lever is in contact with the wrap spring wherein movement of the wrap spring moves the release lever from a release position to a non-release position; and (f) a release block slidably mounted adjacent the release lever wherein when the release lever is in the release position and the release block is moved from a lock position into an unlock position, the release block contacts the release lever and moves the release lever such that the release lever moves the wrap spring so as to release the wrap spring from around the fixed hub, wherein when the release lever is in the non-release position and the release block is moved from the lock position, the release block does not contact the release lever to release the wrap spring from around the fixed hub.