US Patent 8166614 Auxiliary handle for hand-held power tool

An auxiliary handle for a hand-held power tool (7) includes a lockable lag hinge (46) provided between the clamping section (21) and the gripping member (34) and having a pivot pin (47), a tensioning member (51) for tightening and loosening the clamping section (21) and arranged on an end (48) of the pivot pin (47) of the lag hinge (46), a locking device (41) for locking and releasing the lag hinge (46), and an independent from the tensioning member (51), unlocking device (56) for releasing the locking device (41) and having an actuation member (62) upon actuation of which, the locking device (41) is displaced from its locking position in which the lag hinge (46) is locked to its release position in which the lag hinge (46) is released.