Patent ID: 8371194

Claim:
A wrench including: a shank including a slot defined therein longitudinally; a handle attached to an end of the shank and made with a window; a head; a torque assembly for connecting the head to another end of the shank; a torque-setting device including: a knob assembly rotationally inserted in the handle; a bolt connected to the knob assembly so that they are rotatable together; a pusher in engagement with the bolt in a threaded manner and in contact with the torque assembly; and a pin including a first end connected to the bolt and a second end extending through the slot so that the pin is movable along the slot as the knob assembly is spun; a torque-measuring device including: a sleeve rotationally located around the shank and made with a helical groove in an internal side and; a first scale provided on an external side of the sleeve, wherein the second end of the pin is inserted in the helical groove so that the first scale is rotated together with the sleeve as the pin is moved along the slot when the knob assembly is rotated to set a maximum value of torque that can be exerted with the wrench; and a collar located around the shank and made with a window through which the first scale is observable; and a second scale provided on a section of the knob assembly inserted in the handle so that the second scale is rotatable together with the knob assembly and observable via the window of the handle.