Patent ID: 7878076

Claim:
A torque tool for measuring and/or cut-off tightening of a torque on a workpiece, comprising: a housing having a handle; a rod for transmitting torque; a measuring element for electronic detection of said torque; an electronic arrangement for measuring and controlling of processing of said torque detected by said measuring element; a cut-off switch controlled by said electronic arrangement, said switch performing a cutting-off action when said torque reaches a predetermined level; an electrical power amplifier for amplifying power supply required by said cut-off switch to carry out a switching process, said electric power amplifier comprises a fast discharging electrical device capable of providing a short-lasting sufficiently high electrical power peak required for energizing said cut-off switch; a gear mechanism having at least one actuator operated by said cut-off switch and at least one gear lever, said gear mechanism is arranged between said rod for transmitting the torque and said electronically controlled cut-off switch; and wherein said measuring element is arranged on said gear lever of said gear mechanism for electronic detection of said torque.