Depth control mechanism for an implement

Details Depth control mechanism for an implement Depth control mechanism for an implement

1992-10-05

1994-01-11

Reese, Randolph A.

Earth working

Automatic power control

Land leveller type

172413, 172327, 172414, 172423, 172493, 172465, 172668, 91383, A01B 63111, A01B 6322

Patent

active

052772578

ABSTRACT:
A chain is connected at its distal end to the pin at the rod end of a cylinder on an implement lift and depth control assembly. An intermediate portion of the chain is trained around a gear which rotates about the axis of the pin connecting the base end of the cylinder to the implement frame. An adjustable length, spring-biased rod is connected to the proximal end of the chain to maintain tension in the chain and operate a single point depth control valve to establish a highly accurate and repeatable depth setting which is dependent directly on cylinder rod extension and therefore less susceptible to looseness in the implement lift system.

REFERENCES:
patent: 2526058 (1950-10-01), Young
patent: 2573969 (1951-11-01), Heitzig
patent: 2606414 (1952-08-01), Durr
patent: 2606532 (1952-08-01), Ziskal
patent: 2960969 (1960-11-01), Hershman
patent: 3057092 (1962-10-01), Curlett
patent: 3583284 (1971-06-01), Ryan
patent: 4360067 (1982-11-01), Schaaf et al.
patent: 4487267 (1984-12-01), Friggstad
patent: 4932476 (1990-06-01), Hoehm
John Deere Des Moines Works, 960 Series Drawn Field Cultivators Operator's Manual, 1992, pp. 10-5, 40-2 through 40-5.
John Deere Des Moines Works, 960 Series Drawn Field Cultivators Predelivery Instructions, 1991, pp. 15-19 and 15-22.

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