FLUIDIC GRAIN PLANTING CONTROL

摘要

A pneumatic planter type having a seed supply, wherein air under pressure is supplied to a rotary feed wheel having radial pickup fingers, an air control device is provided for each of the fingers having means for utilizing the air pressure to generate a vacuum to attract seed to the finger as it passes through the seed supply and alternately converting the air stream to positive pressure after a predetermined rotation of the feed wheel to successively discharge the seed from the fingers.