Patent ID: 7284451

Claim:
A mechanical dynamometer tool for manually applying torque, said mechanical dynamometer tool comprising: a drive portion arranged to drive a fastener element; a mechanical device operably connected to said drive portion so as to be able to deliver torque to said drive portion in a state of mechanical equilibrium of said mechanical device, said mechanical device being releasable from the state of mechanical equilibrium; a detecting device operable to detect a break in the state of mechanical equilibrium by measuring the torque applied to the fastener element and outputting a signal corresponding to the measurement of the torque applied to the fastener element, and electronically processing the signal corresponding to the measurement of the torque applied to the fastener element, said detecting device comprising: a measurement device operable to measure the torque applied to the fastener element and output a signal corresponding to the measurement of the torque applied to the fastener element; an electronic computation device operable to receive the signal corresponding to the measurement of the torque applied to the fastener element output by said measurement device, process the signal, and subsequently detect the break in the state of mechanical equilibrium; and a computation processing device operable to computationally process the signal corresponding to the measurement of the torque applied to the fastener element, and operable to detect the break in the state of mechanical equilibrium by computing an intersection of a first curve representing the measured value of the torque as a function of time, and a second curve being identical to the first curve with a positive offset in time.