Tractor with draft load control

Details Tractor with draft load control Tractor with draft load control

1975-09-15

1977-05-17

Stouffer, Richard T.

Earth working

Automatic power control

Draft responsive

172 3, A01B 63112

Patent

active

040236226

ABSTRACT:
A hydrostatic drive tractor having a hydraulically lowerable and raisable hitch to lower and raise an associated implement to respectively increase or decrease draft load includes a draft control system sensing increases and decreases in the hydrostatic drive pressure which are proportional to draft load as sensed by the drive wheels to activate valving to respectively raise and lower the hitch.

REFERENCES:
patent: 2940530 (1960-06-01), Du Shane
patent: 3412811 (1968-11-01), Thompson
patent: 3550688 (1970-12-01), Norcliffe
patent: 3575241 (1971-04-01), McKeon et al.
patent: 3753467 (1973-08-01), Wilson

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