| 摘要 |
2075808 9113820 PCTABS00007 A multiple-chocke unit (10) for transporting and metering particulate material wherein the material is compacted to bridging, disturbed and then recompacted as it is friction-driven through a duct. The duct has two opposed walls (32, 36) moving between the inlet (14) and outlet (16) which have a surface area that is larger than the surface area of a stationary wall or walls (44, 46) which form the other part of the duct. The duct includes a plurality of chokes which bridge by compaction, disturb and recompact the material as it is friction-driven through the unit (10). The unit (10) provides simultaneous transport and metering of particulate material. The unit (10) may be used to transport particulate material under atmospheric conditions or into a pressurized system.
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