Patent ID: 7159671

Claim:
A power tool comprising a housing with a substantially cylindrical outer surface, a rotation motor, a power train, and an output shaft, wherein said power train comprises a reverse gearing shiftable between a forward operation mode and a reverse operation mode, and a maneuver ring connected to the reverse gearing and rotatably supported on the housing outer surface for rotation between two extreme positions for shifting the gearing between the forward operation mode and the reverse operation mode, wherein: an arresting device is provided between the maneuver ring and the housing to releasably arrest the maneuver ring in either one of said extreme positions, said arresting device comprises an open ended leaf spring element which extends along a part of the circumference of the housing outer surface and which has two end portions each being formed with a lock surface, and two engagement shoulders provided on the housing outer surface each being arranged to be engaged by one of said lock surfaces, and said maneuver ring comprises two oppositely facing abutment surfaces each abutment surface being arranged to engage one of said leaf spring element end portions at rotational movement of said maneuver ring in either direction, thereby lifting either one of said leaf spring element end portions to disengage the respective lock surface from a corresponding engagement shoulder on the housing outer surface and releasing the maneuver ring for rotation from one of said extreme positions to the other.