Earth working – Overload shifting – Against spring return device
Patent
1980-11-20
1982-12-14
Johnson, Richard J.
Earth working
Overload shifting
Against spring return device
172705, A01B 6104
Patent
active
043633633
ABSTRACT:
A trip mechanism for a ground working tool and, particularly, for use on minimum tillage blade cultivators or mold board ploughs. A shank supports the ground working tool and is supported by the implement frame. A parallel-type deflection linkage allows deflection of the ground working tool with the position of the tillage tool remaining parallel to its original working position. A detent linkage keeps the tillage tool in its original position until the predetermined deflection force is reached.
REFERENCES:
patent: 3219128 (1965-11-01), Lely
patent: 3402775 (1968-09-01), Leduc
patent: 3662839 (1972-05-01), Thorsrud
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