Patent ID: 6477921
Filing Date: 2002-11-12
Classification: B25B

Abstract:
A powered adjustable jaw wrench with anti-jamming device, said power jaw wrench comprising:a wrench body including a wrench body member having a handle portion and a head portion, said head portion defining a stationary jaw; a movable jaw reciprocally mounted to said head portion of said body member in alignment with said stationary jaw, said movable jaw including a gear rack portion; a driven mechanism mounted to said head portion of said body member, said driven mechanism being operably connected to said movable jaw and causing movement of said movable jaw relative to said stationary jaw, said driven mechanism including: a worm gear rotatably mounted in said head portion of said body member, said worm gear engaging said gear rack portion of said movable jaw; and a first rotatable member operably connected to said worm gear; a drive mechanism including a power source mounted in said body member for driving said driven mechanism; and an anti-jamming coupling device provided for operably connecting said first rotatable member to said worm gear and for upsetting said worm gear if jammed by striking action when said powered adjustable jaw wrench is activated.