Patent ID: 7303210

Claim:
A manual drive apparatus providing input rotation to a mechanism, the apparatus comprising: an input shaft having an axis of rotation and a shaft end; a crank connected to the shaft end for movement of the crank between first and second axially spaced positions of the crank relative to the shaft, where in the first position the crank is secured stationary to the shaft and in the second position the crank is free to pivot relative to the shaft; an abutment on the crank that moves with the crank to the first and second positions of the crank; and, a lock member mounted on the shaft for movement of the lock member transverse to the shaft axis between transversely spaced locked and unlock positions of the lock member relative to the shaft, where the lock member engages with the abutment when the crank is in the first position and the lock member is in the locked position, and the lock member engaging with the abutment resists movement of the crank from the first position to the second position relative to the shaft, and where the lock member disengages from the abutment when the crank is in the first position and the lock member is in the unlocked position, and the lock member in the unlocked position does not resist movement of the crank from the first position to the second position relative to the shaft.