Patent ID: 7121359
Filing Date: 2006-10-17
Classification: B25D

Abstract:
1. A drilling hammer comprising a hammer tube ( 13 ) that is rotatably supported in a housing ( 10 ), the hammer tube being rotationally driveable by a driven wheel ( 31 ) of a gear unit ( 30 ) sitting on the hammer tube ( 13 ), with a striking tool ( 14 ) located in the hammer tube ( 13 ), the striking tool including a piston ( 15 ) that can be driven with a reciprocating motion, and an operating mode change-over switch ( 35 ) for the “impact drilling” and “chiseling” operating modes, the operating mode change-over switch including a manually actuatable control button ( 36 ) and a switching mechanism ( 37 ) connected with the control button ( 36 ), the switching mechanism coupling the hammer tube ( 13 ) to the driven wheel ( 31 ) when in the “impact drilling” operating mode of the control button ( 36 ) and fixing the hammer tube in a non-rotative manner in the housing ( 10 ) when in the “chiseling” operating mode, wherein the switching mechanism ( wherein, to fix the actuator ring (