Patent ID: 7416144

Claim:
A percussion tool ( 1 ) for comminuting materials, including wood waste materials, the percussion tool ( 1 ) comprising: a beater head ( 10 ) connected at an end of a shank ( 20 ); a cutting insert ( 11 ) with an upper cutting edge ( 13 ) extending transversely with respect to the cutting direction fastened on the beater head ( 10 ); the cutting insert ( 11 ) having a first cutting element ( 12 ) and a second cutting element ( 12 ), and a free space ( 16 ) corresponding to a shape of the upper cutting edge ( 13 ) arranged on the beater head ( 10 ) in a cutting direction behind the cutting insert ( 11 ); and an impact plate ( 19 ) on the beater head ( 10 ) in an area between the cutting insert ( 11 ) and the shank ( 20 ) on a side facing a material to be cut, wherein the impact plate ( 19 ) is made of a hard alloy and directly adjoins a side of at least one of the first and second cutting elements that faces away from the cutting edge ( 13 ).