Automatic coulter depth control

Details Automatic coulter depth control Automatic coulter depth control

1978-11-03

1981-02-17

Johnson, Richard J.

Earth working

Diverse tools

Including spring formed tool or standard

172178, 172398, A01B 1910, A01B 6332, A01B 63114

Patent

active

042509700

ABSTRACT:
A farm implement has a mobile frame from which is suspended a number of chisel plow shanks and a row of rolling coulters ahead of the plows for cutting crop residue to prevent trash buildup and plugging at the plows. A transverse rock shaft on the frame is provided with swingable wheel arms and cranks to which hydraulic piston and cylinder assemblies are connected for raising and lowering the frame, and therefore, the plows and the coulters in unison. The coulters are swingably mounted on the frame for up and down movement relative to the frame as well as fore and aft movement toward and away from the plows. Turnbuckles pivotally interconnecting the coulter supports and the wheel arms impart swinging movement to the coulters during up and down movement of the frame. Accordingly, adequate slicing heights for the cutters are automatically maintained even at shallow plowing depths.

REFERENCES:
patent: 968658 (1910-08-01), Hanson
patent: 1446530 (1923-02-01), Wicks
patent: 1796629 (1931-03-01), Stabenow
patent: 2286312 (1942-06-01), Scarlett
patent: 2970658 (1961-02-01), Kopaska
patent: 3006422 (1961-10-01), Mighell
patent: 3090447 (1963-05-01), Hotchkiss
patent: 3225839 (1965-12-01), Pettit
patent: 3658362 (1972-04-01), Fackler
patent: 3912017 (1975-10-01), Rehn

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