Patent ID: 7444907
Filing Date: 2008-11-04
Classification: B25B

Abstract:
1. A hand tool operable to grasp a workpiece between a first jaw and a second jaw, the hand tool comprising: a first arm; a second arm operably linked to the first arm so as to cause relative motion of the first and second jaws upon motion of the arms, the second arm having a pin slot; a jaw arm having a first end and a second end, the first end integral with and partially defining the second jaw and the second end pivotably coupled to the first arm; a control arm having a first end pivotably linked to the first arm and a second end pivotably linked to the second arm at a moveable pivot location, the second end of the control arm being closer to the jaws than the first end, the control arm configured to control relative motion of the first and second arms into and out of an overcenter lock position, a pivot pin connected to the second end of the control arm at the movable pivot location, wherein the pin slot of the second arm is adapted for securing the pivot pin; and a rotatable force adjustor located on the second arm so that rotation of the force adjustor in a first direction moves the moveable pivot location so as to increase the level of force required on the second arm to move the control arm into the overcenter lock position.