Mobile stone crushing machine

A - Human Necessities – 01 – B

Patent

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55/30, 241/47

A01B 43/00 (2006.01) A01B 77/00 (2006.01) B02C 4/02 (2006.01) B02C 4/30 (2006.01) B02C 21/02 (2006.01)

Patent

CA 1037011

ABSTRACT OF THE DISCLOSURE A stone crushing unit for mounting on an agricultural or construction machine has a chassis on which is mounted an end- less conveyor, a front end of which is adapted to collect stones from the ground as the machine is advanced over the ground, and from which the stones are discharged into said stone crushing unit. The stone crushing unit includes two crushing zones, one above the other, each of which incorporates at least one crushing roller, and a further crushing member co-operating with the roller to define a nip, so that the stones to be crushed first pass through the nip at the first zone and, on discharge from this nip, the partially crushed stones and other matter then pass through the nip at the other zone. The rollers are so mounted as to allow the rollers to move away from their respective co-operating crushing members against the force of gravity to allow passage of uncrushable material through each nip, the weight of each roller providing all the crushing force at each nip.

197805

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