Patent ID: 8176997

Claim:
A hand-held power tool, comprising an outer housing ( 6 ); a work spindle ( 4 ) located in the outer housing ( 6 ); a chuck ( 3 ) for receiving an axially displaceable, within limits, percussion working tool ( 2 ) and mounted on the work spindle ( 4 ), the work spindle ( 4 ) including a coaxial die ( 5 ) located in an interior thereof for imparting blows to the percussion working tool ( 2 ); at least one cooling air channel ( 7 ) extending in the outer housing ( 6 ) radially outwardly of the work spindle and opening into a free space ( 8 ) of the chuck ( 3 ) which adjoins the work spindle ( 4 ) and communicates with the interior of the work spindle through at least one opening ( 10 , 10 ′) formed in the work spindle ( 4 ); and a seal ( 9 , 9 ′) circumferentially surrounding an annular gap ( 11 ) that adjoins the free space ( 8 ) and is formed between the outer housing ( 6 ) and the chuck ( 3 ) for completely flowtight sealing the free space ( 8 ) outwardly.