| 摘要 |
PCT No. PCT/NZ95/00059 Sec. 371 Date Jan. 3, 1997 Sec. 102(e) Date Jan. 3, 1997 PCT Filed Jul. 3, 1995 PCT Pub. No. WO96/01037 PCT Pub. Date Jan. 18, 1996A particulate material dispensing system suitable for metering seed for individual rows of a seed sowing drill. The seed sowing drill having a container which acts as a seed hopper. Positioned beneath the container is a metering device. Below the metering device are a number of tubes which are seed outlets to which the metering device feeds the seed it receives from the container. A peripheral guide forms part of the metering device. The peripheral guide is a disc of material that defines an aperture. On the inner walls of the guide is a seed track and an outlet. There are a plurality of seed track/outlet combinations, one for each of the outlets. A vertical-axis rotor fits within the aperture of the guide. The rotor rotating within the aperture causes seed falling from the container into the guide to be dragged down and around the inside walls of the guide. The seeds are guided by a seed track to a guide outlet and into the appropriate seed outlet. At the base of the seed track is a flange. The flange enables a column of seed to build up within the seed track providing some independence of the availability of the seed to the rotor from the container. A method of dispensing particulate material is also disclosed.
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