Patent ID: 6913090

Claim:
A hand-held powered hammer comprising: a hammer housing; a hammering mechanism; a spindle rotatably mounted within the housing; the spindle having at least two selectable modes of operation including a first mode in which the spindle is rotatable within the housing and a second mode in which the spindle is restrained from rotation; a first set of teeth rotatable with the spindle and selectably movable between a first position, corresponding to the first mode of operation of the spindle, and a second position, corresponding to the second mode of operation of the spindle; a spindle lock arrangement mounted within the housing and comprising a spindle lock tooth engageable with the first set of teeth when the first set of teeth are in the second position, and a resilient synchronising element positioned to engage the first set of teeth before the first set of teeth reaches the second position, so as to align the first set of teeth for engagement with the spindle lock tooth when the first set of teeth are in the second position.