Draft and position control linkage with depth limit for a tracto

Details Draft and position control linkage with depth limit for a tracto Draft and position control linkage with depth limit for a tracto

1976-12-17

1978-08-22

Stouffer, Richard T.

Earth working

Automatic power control

Draft responsive

A01B 63112

Patent

active

041082486

ABSTRACT:
An improved draft and position control system for a tractor. Independent manually operable draft and position controls are provided for establishing a desired draft and/or position of an implement drawn by a tractor. The position control establishes the maximum lowered position to which the implement may descend and will override any draft signals which would tend to lower the implement beyond this point. The draft control includes the draft responsive member interconnected with a feedback mechanism which will tend to maintain the desired draft on the implement. An additional position feedback is provided which can moderate the draft feedback to prevent undue response of the implement during changes of the draft load. In accordance with the principles of this invention the position feedback which moderates the draft feedback can be infinitely varied between a first setting wherein it fails to moderate to a second setting where it substantially moderates. Furthermore, the moderating position feedback is inoperative over a range of movement corresponding to that movement of the implement above the ground.

REFERENCES:
patent: RE25512 (1964-01-01), Presnell et al.
patent: 2864295 (1958-12-01), DuShane
patent: 3399733 (1968-09-01), North
patent: 3412811 (1968-11-01), Thompson
patent: 3422906 (1969-01-01), Bunting et al.
patent: 3674095 (1972-07-01), Roger
patent: 3732933 (1973-05-01), Foxwell et al.
patent: 3768570 (1973-10-01), Green
patent: 3901323 (1975-08-01), Mueller, Jr.
patent: 3917002 (1975-11-01), Mueller, Jr.
patent: 3918527 (1975-11-01), Wagner

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