Patent ID: 8132296

Claim:
An auxiliary handle device for providing a removable auxiliary handle which can be added to a hand-held power tool so that an operator can grasp the auxiliary handle when the auxiliary handle device is connected to the hand-held power tool, the auxiliary handle device being connected to the hand-held power tool along a fastening axis which is parallel to a working axis of the hand-held power tool, the auxiliary handle device having a fastening device that has at least one first fastening means, the first fastening means including a groove-shaped recess on the hand-held power tool which extends in a circumferential direction, the first fastening means further including a fastening element in the auxiliary handle which engages the groove-shaped recess so that the first fastening means provide a form-locked connection along the fastening axis, the fastening device also including a second fastening means which has at least one bar-shaped raised area on the hand-held power tool, wherein the second fastening means also has at least one recess in the auxiliary handle which can engage with the at least one bar shaped raised area so that when the auxiliary handle is attached to the hand-held power tool the second fastening means holds said handle in one of a plurality of preset rotational positions about the fastening axis, the auxiliary handle having two handle parts, both of which can be grasped by the operator during use, wherein one of the handle parts is rotatable with respect to the other handle part, and wherein the rotatable handle part includes a threaded connector which is at least partially positioned within the other handle part and are operable so that when the rotatable handle part is rotated the threaded connector causes the fastening element to be forced into the groove-shaped recess and thus lock the auxiliary handle device onto the hand-held power tool.