Subsoil tillage tooth

Details Subsoil tillage tooth Subsoil tillage tooth

1977-06-13

1978-11-28

Johnson, Richard J.

Planting

Liquid or gas soil treatment

Hand manipulated

111 86, 172700, 172765, A01B 1308

Patent

active

041270738

ABSTRACT:
An improved subsoil plow assembly to be attached to an implement frame employs a soil-splitting leading edge of arcuate cuspate shape, breaking the earth but inhibiting the mixing of the subsoil with the topsoil. That portion below the cuspal apex tends to split away and sidewardly while the portions above the apex are directed upwardly. The plow is preferably comprised of laminate construction providing strength and particular suitability for forming a channel therein directing passage of gaseous or liquid fertilizer into the soil. An alternate embodiment includes a pocket on the leading edge accepting removable and replaceable cuspal inserts useful in differing soil conditions.

REFERENCES:
patent: 27285 (1860-02-01), Griffin
patent: 546330 (1895-09-01), Howe
patent: 916868 (1909-03-01), Horinek
patent: 2036559 (1936-04-01), Zuckerman
patent: 2439743 (1948-04-01), McEwen
patent: 2632265 (1953-03-01), Ryan
patent: 3259087 (1966-07-01), Horton
patent: 3387668 (1968-06-01), Mathers
patent: 3393753 (1968-07-01), Perkins
patent: 3450212 (1969-06-01), Sylvester
patent: 3538986 (1970-11-01), Stoffel
patent: 3659426 (1972-05-01), Caldwell
patent: 3931858 (1976-01-01), North

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