Patent ID: 8181895

Claim:
A crusher comprising at least a main shaft having an axial line and fitted in the lower frame of the crusher, a eccentric comprising at least a first eccentric bushing and a second eccentric bushing around the main shaft, of which the second eccentric bushing is inside the first eccentric bushing, and of which the first eccentric bushing comprises a gear transmission for rotating the eccentric, a first crushing blade, and a second crushing blade, of which the first crushing blade is fitted to move along an eccentric path, which path can be adjusted by changing the mutual position of the first eccentric bushing and the second eccentric bushing of the eccentric, wherein the second eccentric bushing comprises a gear transmission for rotating the eccentric, and the crusher comprises adjusting means for changing the mutual position of the gear transmission of the first eccentric bushing and the gear transmission of the second eccentric bushing and thereby for adjusting the eccentric path of the eccentric and that the eccentric shaft is fitted at least partly in to the first crushing blade.