Implement with horizontal linkage depth control

Details Implement with horizontal linkage depth control Implement with horizontal linkage depth control

1983-09-16

1985-08-20

Johnson, Richard J.

Earth working

With actuator adapted to lift tool for transport on wheeled...

Plural tools, independently actuatable

172484, 172166, A01B 1308

Patent

active

045358494

ABSTRACT:
An agricultural tillage implement has a main frame provided with support wheels and carrying the first set of ground working tools. A first lift mechanism raises and lowers the main frame relative to the support wheels. A sub-frame, carrying a second set of ground working tools, is adjusted in height relative to the main frame by means of a second lift mechanism comprising a single rock shaft and four-bar linkage. Vertical frame extensions on the main frame and the sub-frame provide parallel links in the four-bar linkage to permit greater angular adjustment of the rock shaft and, hence, greater vertical adjustment of the sub-frame for a single rock shaft actuator.

REFERENCES:
patent: 1557109 (1925-10-01), Vandenberg
patent: 2701509 (1955-02-01), Rolfes
patent: 3209841 (1965-10-01), Lely
patent: 3576213 (1969-03-01), Hall
patent: 3744571 (1973-07-01), Nichols
patent: 4191262 (1980-03-01), Sylvester
patent: 4245706 (1981-01-01), Dietrich
patent: 4250970 (1981-02-01), Pfenninger
patent: 4313503 (1982-02-01), Good
patent: 4433735 (1984-02-01), Clark

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