| 摘要 |
Ground injection, eg, aeration, apparatus adapted to be mounted on or drawn by a tractor and comprising one or more tines ( 12 ) reciprocated vertically by a crank ( 13 ) and crank shaft ( 13 a) driven from a motor ( 14 ). Each tine ( 12 ) defines an internal passage ( 27 ) with outlet apertures ( 26 ). A compressor ( 24 ) connected to the passage ( 27 ) by a duct ( 23 ) having a poppet valve ( 21 ) actuated by a cam disc ( 19 ) on the crank shaft ( 13 a) delivers a pulse of air to be injected into the ground through outlet apertures ( 26 ) at the position of maximum penetration of the ground by each tine ( 12 ). Instead of air, a liquid, a powder, or other gaseous substance may be injected into the ground where it is penetrated by each tine. The apparatus may include two or more rows of such tines and associated injection means.
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