Patent ID: 7258173

Claim:
Electric power tool, comprising an external housing ( 12 ; 42 ); a percussion mechanism ( 15 ; 45 ) arranged in the external housing ( 12 ; 42 ), a motor ( 13 ) for driving the percussion mechanism ( 15 ; 45 ); a gear unit ( 14 ) for connecting the driving motor ( 13 ) with the percussion mechanism ( 15 ); and means for cooling the power tool ( 11 ) and including a fan element ( 19 ) located in the external housing for generating a cooling air flow ( 26 ) in the external housing ( 12 ), at least one cooling air channel ( 18 ) extending longitudinally of the percussion mechanism ( 15 ) and a cross-section of which has a constriction ( 21 ; 51 ), a fresh air channel ( 31 ; 61 ) extending longitudinally and having an intake opening ( 32 ; 62 ) for communicating with atmosphere and formed in the external housing ( 12 ; 42 ) and a connection opening ( 33 ; 63 ) for communicating with the cooling air channel ( 18 ; 48 ), the connection opening ( 33 ; 63 ) being arranged in an area of the constriction ( 21 ; 51 ) of the cooling air channel ( 18 ; 48 ).