Patent ID: 7350725

Claim:
A vertical shaft impact crusher for crushing material, said crusher comprising: a rotor for accelerating a first flow of material to be crushed, a first feed means for vertically feeding the first flow of material to the rotor, a housing comprising a wall with a circumferential impact wall section against which the accelerated first flow of material may be crushed, a second feed means for feeding a second flow of material to be crushed into the path of the accelerated first flow of material, wherein the second feed means comprises means for forming at least one hillside on which the second flow of material may slide, the hillside having a slope being substantially tangential in relation to the rotor for directing the second flow of material in a direction having a substantially tangential component in relation to the rotor, such that the second flow of material will have a substantially tangential component of movement in relation to the rotor when reaching the path of the first flow of material.