Patent ID: 6966242

Claim:
An adjustable 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 having a toothed segment; a drive mechanism mounted to said head portion of said body member, said drive mechanism being operably connected to said movable jaw for selectively moving said movable jaw in directions away from and toward said stationary jaw, said drive mechanism including a worm gear rotatably mounted in said head portion of said body member, said worm gear having a screw thread drivingly engaging teeth of said toothed segment of said gear rack portion of said movable jaw; and a positioning device including at least one preset stop for limiting a travel of said moveable jaw in at least one of said direction away from said stationary jaw and said direction toward said stationary jaw, said at least one preset stop of said positioning device includes a stop member provided on said worm gear and a complementary stop member provided on said movable jaw so that said stop member of said worm gear is adapted to engage said complementary stop member of said movable jaw to limit said travel of said moveable jaw in at least one of said direction away from said stationary jaw and said direction toward said stationary jaw; wherein said at least one stop member of said worm gear is formed on one of a start lead and an exit lead of said screw thread of said worm gear.