Patent ID: 6868919
Filing Date: 2005-03-22
Classification: B25D

Abstract:
1. An electric combination hammer that can be used alternatively as a drilling hammer and a chiseling hammer, wherein, when changing over from a drilling mode to a chiseling mode, an ON/OFF and change-over switching device for individual electrical functions of the combination hammer are actuated at the same time, comprising a bistable switch including two elements ( 4 , 5 ) that can be moved relative to one another by the actuation of the changeover device ( 2 , 3 ), wherein a bistable switch, in one switching position of the changeover device ( the bistable switch is a Hall sensor switch ( at least one of said electrical system functions is a blocking protection, that is in the active position when the drilling mode is selected, and is switched over into the inactive position when the chiseling mode is selected.