Patent ID: 7137321

Claim:
An adjustable wrench comprising: a fixed jaw having a front side which is a fixed block, the fixed block being formed with a main passage and a tunnel communicating with each other, the tunnel further communicating with a radial duct; a movable jaw guidable by the fixed jaw and transversely movable relative to the fixed block of the fixed jaw, an adjustable clamping area being defined between the movable jaw and the fixed block of the fixed jaw, a bottom side of the movable jaw being formed with a rack; a shaft member having a first end section and a second end section opposite to the first end section, a stopper section being defined between the second end section and a middle section of the shaft member, the middle section being fitted in the main passage of the fixed jaw, the second end section and the stopper section being fitted in the tunnel of the fixed jaw with the stopper section aligned with the duct, a spiraled wheel being disposed around the middle section and engaged with the rack of the movable jaw, a spring being fitted on the shaft member between the spiraled wheel and the second end section, two ends of the spring respectively abutting against the spiraled wheel and a wall of the main passage; a handle having a front end pivotally connected with the fixed jaw, a first side of the front end of the handle being formed with a cavity in which a resilient member is accommodated, one end of the resilient member pushing a bottom end of the fixed block; and a stopper pin slidably disposed in the duct of the fixed block and drivable by the handle, whereby a first end of the stopper pin can selectively extend to the stopper section of the shaft member to stop the stopper section.