PORTABLE POWER WRENCH WITH A MANUALLY OPERATED POWER CONTROL MEANS

摘要

A portable power wrench of the angle type comprises an elongate housing (10) with an angle drive head (12) and a rear handle (11) and supports a motor. The power wrench further comprises a manually operated power control means (16,20) including a main power control trigger (16) located at the rear handle (11) and an auxiliary power control trigger located at the angle drive head (12), wherein the motor as well as the main trigger (16) and the auxiliary power control trigger (20) are connected to a programmable control unit (18) in which are stored operation parameter sets suitable for a screw joint running down phase and a final tightening phase, respectively. The auxiliary power control trigger (20) is arranged to activate the running down parameter set only, whereas the main power control trigger (16) is arranged to activate the final tightening parameter set.