| 摘要 |
PCT No. PCT/GB96/00240 Sec. 371 Date Oct. 10, 1997 Sec. 102(e) Date Oct. 10, 1997 PCT Filed Feb. 12, 1996 PCT Pub. No. WO96/25245 PCT Pub. Date Aug. 22, 1996A mobile screening apparatus includes a wheel-supported main frame and a hopper mounted at or near to one end of the main frame. An elevator mounted on the frame feeds material received from the hopper to a screening device which screens the material into different size ranges. Discharge conveyors discharge different size ranges of the screened material to respective discharge positions. A tractor unit is releasably coupled with a towing coupling provided at one end of the main frame. The tractor unit is operative to move the apparatus over the ground while screening operations take place so that traveling deposits of screened material can be formed. A power plant mounted on the frame is arranged to drive the screening device, the elevator, and the discharge conveyors. |
