Patent ID: 7070008

Claim:
A drilling- and/or chipping hammer having a beater mechanism ( 14 ) and a coupling device ( 12 , 100 ), which is engageable and disengageable in order to make and break a drive connection ( 16 , 102 ) of the beater mechanism ( 14 ), wherein the coupling device ( 12 , 100 ) has a synchronizing device ( 18 , 112 ), with a detent mechanism ( 20 , 110 ) which transmits a drive moment to the beater mechanism ( 14 ) and which has at least two corresponding detent elements ( 22 , 24 , 108 ), wherein said coupling device ( 12 , 100 ) has two coupling elements ( 32 , 44 , 104 , 122 ), wherein the two coupling elements ( 32 , 44 , 104 , 122 ) are synchronized by the synchronizing device ( 18 , 112 ) when the coupling device ( 12 , 100 ) is engaged, at least one of the detent elements ( 22 ) being movable about its detent position upon an overlooking moment, counter to a spring force of a spring element ( 26 , 116 ), wherein said coupling elements ( 32 , 44 , 104 , 122 ) have correspondingly embodied clawlike positive-engagement elements ( 48 , 50 ) bridging said synchronizing device ( 18 , 112 ) when the coupling device ( 12 ) is fully engaged.