Patent ID: 7229041

Claim:
A crusher blockage clearance apparatus mounted to a crusher having a housing, the housing having an opening through which crushable materials pass before being crushed, the opening defined by a gap extending between an opening end of a lid having at least one anvil mounted to the lid and an opening portion of the housing, the housing containing a rotatable rotor with blow bars against which crushable materials are forced during operation, the blockage clearance apparatus comprising: (a) a pivot mounted between the lid and the housing, the pivot being at a distal position spaced from the opening end of the lid, for displacing the opening end of the lid substantially vertically relative to the opening portion of the housing, thereby changing the height of the opening; (b) at least one prime mover drivingly linking the lid and the housing for pivoting the lid and attached anvil about the pivot relative to the rotor; and (c) at least one guard positioned adjacent the lid, the guard extending from near the opening end of the lid along at least a substantial portion of the length of the lid for restricting exit of the materials inside the crusher during a blockage clearance operation.