Two-stage trip release shank assembly

Details Two-stage trip release shank assembly Two-stage trip release shank assembly

1979-04-30

1981-02-10

Stouffer, Richard T.

Earth working

Overload shifting

Against spring return device

172711, A01B 6104

Patent

active

042496152

ABSTRACT:
An implement shank is pivotally attached to the frame of the implement and normally is maintained in the soil by a heavy duty coil spring reacting between the shank and a support extending from the frame. The spring mount and shank holder are connected together so that if the shank trips due to striking an obstruction, the connection moves towards an over center line and if the obstruction is maintained, the connection moves over the over center line. When it passes over center, it engages a leaf spring extending from the frame which returns the connection back over center when the obstruction is passed whereupon the coil spring returns the implement into the ground. The coil spring is attached to a resilient member extending from the frame so that the shock load is absorbed as the implement returns to the ground engaging position, particularly when this return is somewhat rapid due to the heavy duty nature of the coil spring.

REFERENCES:
patent: 2406353 (1959-09-01), Rogers
patent: 3098529 (1963-07-01), Wade et al.

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