| 摘要 |
Snow is dumped into a portable compressor which compresses the snow by hydraulic power through three stages into blocks of great density which require much less space than the original show and can hence be carried away with greater economy, or piled up with less commandeering of usable space. Hydraulic strokes are controlled by limit switches. When sufficient density is achieved in the final stage, the hydraulic pressure trips a switch which opens a gate so that continued cycling of the compacting apparatus ejects a highly compacted block of snow. When far enough out, it trips a switch to cause the gate to close, shearing off the projecting block, and dropping the block onto a conveyor. The combination of a swinging guard and pusher plate jointly forming one wall of the hopper permits handling huge quantities of snow.
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