Furrow opener assembly with integral down-pressure adjustment

Details Furrow opener assembly with integral down-pressure adjustment Furrow opener assembly with integral down-pressure adjustment

1986-03-24

1987-10-20

Johnson, Richard J.

Earth working

Tool, standard or connection

Spring biased or formed tool or tool part

172500, 111 84, A01B 3524

Patent

active

047007850

ABSTRACT:
A shank assembly including a rearwardly opening bracket pivotally mounting a shank. A tension link extends upwardly from a central portion of the shank and through an apertured strap. A stop member at the upper end of the link limits the downward rocking of the shank. An adjustable arm assembly including a trunnion slidably received over the tension link is pivotally connected to the bracket and adjustably compresses a down-pressure spring which encircles the link between the trunnion and the shank. Individual down-pressure adjustments can be made without affecting the transport height of the assembly.

REFERENCES:
patent: 410436 (1889-09-01), Packham
patent: 3194323 (1965-07-01), Zimmerman
patent: 3258076 (1966-06-01), Groenke
patent: 3700038 (1972-10-01), Essex
patent: 4210210 (1980-07-01), Ankenman
patent: 4261423 (1981-04-01), Williamson

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