Patent ID: 7806353

Claim:
A crusher apparatus which comprises: a crusher device having an inlet for receiving a supply of crushable bulk material, and an outlet for discharging crushed material; and a feeder device arranged to feed the supply of bulk material to the inlet of the crusher device; in which the feeder device comprises an endless conveyor having an input end and a discharge end, the conveyor being adjustable between an operative feeding position in which the bulk material can be supplied to the inlet of the crusher device, and an inoperative, discharge position to discharge undesirable material present in the bulk material for supply to the crusher device, without being fed to the crusher device; wherein the crusher device is stationary with regard to the adjustable conveyor that is capable of movement between the feeding and discharge positions; wherein the conveyor is mounted on a support platform via a turntable or slew ring, adjacent to the crusher device, and is capable of carrying out slewing movement with respect to the platform and the crusher device to move between its operative position in which the discharge end of the conveyor is aligned to supply material to the inlet of the crusher device and its discharge position in which the discharge end of the conveyor is aligned to discharge material to one side of the crusher device without being fed to the crusher device.