Patent ID: 7000508

Claim:
A torque wrench having a preset maximum torque, the torque wrench including a hollow, cylindrical handle, an enclosed box portion at a forward end of the handle, a torque measurement assembly at a rear end of the handle and being releasably coupled to a rear end of the enclosed box portion, and a numeric display device for receiving signals output from the torque measurement assembly, the torque measurement assembly comprising: a trigger member mounted in the handle, the trigger member having a front end releasably coupled to the rear end of the enclosed box portion; a signal generator including a forward end coupled to a rear end of the trigger member, the signal generator being adapted to generate signals and transmit the signals to the display device; and a setting assembly mounted at the rear end of the handle, the setting assembly having a forward end coupled to the signal generator, the setting assembly being adapted to move in the handle for pushing the signal generator; wherein the signal generator comprises a forward resilient means having a forward end biased against the trigger member, a rear sensor, and an intermediate disc having a forward side engaged with the resilient means and a rear side engaged with the sensor so that the sensor is adapted to generate signals in response to compressing or expanding the resilient means; further wherein the disc comprises a raised central portion at the rear side engaged with the sensor, the engagement area being substantially the same as a front surface of the sensor.