Patent ID: 7331246
Filing Date: 2008-02-19
Classification: B25B

Abstract:
1. A mechanical torque wrench for engaging a workpiece, comprising: a wrench body defining an elongated interior compartment; a wrench head including a workpiece engaging portion and a bar extending therefrom, said wrench head being pivotally secured to a first end of said wrench body at a pivot joint, said bar extending into said interior compartment and said workpiece engaging portion extending outwardly from said wrench body; a hand grip located on a second end of said wrench body; a set spring disposed within said interior compartment of said wrench body; a pawl disposed between a rear face of said bar and said set spring; a dial screw threadably received within said interior compartment of said wrench body such that said dial screw moves along a longitudinal axis of said wrench body when rotated, rotation of said dial screw in a first direction compressing said set spring and rotation in a second direction allowing expansion of said set spring; a set ring positioned adjacent said hand grip, said set ring being operatively connected to said dial screw and rotatable relative to said wrench body; a resistive element operatively coupled to said dial screw and producing an output signal, said output signal being dependent on a position of said dial screw relative to said resistive element; a processor for converting said output signal into an equivalent torque value, said equivalent torque value indicating a preset torque to be applied by said mechanical torque wrench to the workpiece; a user interface including a display for displaying said equivalent torque value; and wherein application of a torque greater than said preset torque to the workpiece causes said wrench head to pivot relative to said wrench body about said pivot joint.