Chisel plow release mechanisms

Details Chisel plow release mechanisms Chisel plow release mechanisms

1985-08-20

1987-10-13

Johnson, Richard J.

Earth working

Tool, standard or connection

Spring biased or formed tool or tool part

172265, A01B 6104

Patent

active

046992219

ABSTRACT:
This invention relates to an automatic release mechanism for a cultivator which provides good resistance to release of the shank holder and which upon release causes the shank holder to rise to a good height to clear obstacles encountered during operation of the cultivator. The shank holder is mounted so as to pivot about an axis and is retained in the working position by a pair of springs under tension, the forward end of the springs being mounted in front of and beneath the position of the pivot axis of the shank holder, and the moment arm of the springs is such that, as the shank holder pivots, the moment arm decreases resulting in the tangential force applied by the springs to the ground engaging tool about the pivot axis remaining substantially constant during pivoting of the shank holder to clear an obstacle.

REFERENCES:
patent: 642349 (1900-01-01), Martin
patent: 1290446 (1918-03-01), White
patent: 1524369 (1925-01-01), Ramage
patent: 3012617 (1961-12-01), Anderson
patent: 3084749 (1963-04-01), Anderson
patent: 3108643 (1963-10-01), Williams
patent: 3606928 (1971-09-01), Ouanbeck
patent: 3708019 (1973-01-01), Ryan
patent: 4011915 (1977-03-01), Anderson
patent: 4143718 (1979-03-01), Ouanbeck
patent: 4453602 (1984-06-01), Larsen et al.
Wil-Rich Chisel Plows-Advertizing Brochure of Wil-Rich Wahpeton N.D.

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