Air injection cultivator

Details Air injection cultivator Air injection cultivator

1986-10-06

1988-08-02

Feyrer, James R.

Planting

Liquid or gas soil treatment

Hand manipulated

172166, 172415, 172699, A01B 3700

Patent

active

047608048

ABSTRACT:
A cultivator has a blade downwardly projected from a frame, an injector provided at a lower portion of the blade, a compressor mounted on the frame and an air tank for storing air compressed by the compressor. An unloading valve provided in a hydraulic circuit for supplying compressed air in the air tank to the injector. The unloading valve is arranged to be opened when the pressure in the air tank is higher than a predetermined value. A master valve is provided in the circuit means, for passing the compressed air to the injector. A mechanical valve is provided to be opened when the depth of the injector reaches a predetermined value, so that the compressed air is supplied to the master valve to open it, whereby air is injected from the injector when the pressure in the air tank is higher than the predetermined value at the predetermined position of the injector.

REFERENCES:
patent: 2895665 (1959-07-01), McSweeney
patent: 3448757 (1969-06-01), Mercier
patent: 3546886 (1970-12-01), Jones et al.
patent: 3956999 (1976-05-01), English
patent: 3967564 (1976-07-01), Emling
patent: 4566543 (1986-01-01), Kotani
patent: 4570553 (1986-02-01), Ito
patent: 4660480 (1987-04-01), Zinck

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