Spring tip shank assembly having quick-dropping trip-out force a

Details Spring tip shank assembly having quick-dropping trip-out force a Spring tip shank assembly having quick-dropping trip-out force a

1997-03-06

1998-08-04

Carone, Michael J.

Earth working

Overload shifting

Against spring return device

172705, A01B 6104

Patent

active

057879923

ABSTRACT:
The spring trip assembly has lever mechanism between the shank and the compression spring which causes the trip-out force of the shank to drop sharply once the relatively high, initial trip-out force level has been reached, thus permitting the shank to slide up and over obstructions without breakage. The compression spring is actuated from both ends simultaneously as the shank rises so that although the trip force drops off quickly, energy also builds up quickly in the spring. Thus, the trip force does not drop as low as it otherwise would, assuring that ample return force is available to reset the shank down into the soil in its working position. Various components of the assembly can be removed and replaced easily without disassembling the entire unit from the tool bar.

REFERENCES:
patent: 3194323 (1965-07-01), Zimmerman
patent: 3529673 (1970-09-01), Morris
patent: 3700039 (1972-10-01), Essex et al.
patent: 4530406 (1985-07-01), Hake et al.
patent: 4532790 (1985-08-01), Nicholls
patent: 5197552 (1993-03-01), Di Maria
Morris Brochure entitled "Challenger II Spring Cushion", (date of puclication unknown).
Morris Brochure entitled "Magnum II Chisel Plows", all pages, (date of publication unknown).

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