Patent ID: 7757374

Claim:
A chuck comprising: moveable jaws operable to selectively retain a work piece; an actuating member operable to cause said jaws to move when said actuating member rotates relative to said jaws, movement of said jaws corresponding to tightening and loosening said jaws; a first locking feature operable to selectively prevent said actuating member from rotating relative to said jaws regardless of a non-breaking rotational force imparted on said actuating member, said first locking feature being separate from said jaws; and a second locking feature operable to inhibit said actuating member from rotating relative to said jaws, said second locking feature moving to an inhibiting position when a force exceeding a predetermined value has been imparted between said actuating member and a component of said second locking feature, said second locking feature inhibiting loosening of said jaws when in said inhibiting position.