Chuck with jaw blade rotational stop

摘要

A chuck (10) is provided for use with a manual or powered driver, such as a drill. The chuck (10) has a body member (12) with angularly disposed passageways (20) formed therethrough. A plurality of jaws (22) are slidably positioned within the angularly disposed passageways (20). The jaws (22) grip upon a tool shank inserted into the body member. A nut (30) is rotatably mounted on the body member (12) and has nut (30) threads defined on an inner circumference thereof in engagement with the jaw threads (28). A sleeve member (36) is in driving rotational engagement with the nut (30) whereby when the sleeve (36) is rotated with respect to the body member (12), the jaws (22) are also moved within the passageways (20). A rotational stop (38) is defined between the nut and jaws wherein upon the jaws reaching a predetermined position within the passageways, further rotation of the nut in an opening direction is prevented. The stop comprises a radially extending surface (40) defining an end of the nut threads. The radially extending surface (40) contacts a side surface (44) of at least one of the jaws (22). <IMAGE>