Earth working – Automatic power control – Draft responsive
Patent
1979-08-06
1981-10-06
Stouffer, Richard T.
Earth working
Automatic power control
Draft responsive
91387, 91461, A01B 63112
Patent
active
042930405
ABSTRACT:
A hydraulic draft control system for use on a tractor and having a pilot valve regulating flow and pressure for automatically operating a draft control valve. The pilot valve opens and closes in response to draft loads sensed on the tractor to control the opening and closing of the control valve for raising and lowering of an implement on the tractor.
REFERENCES:
patent: 2779604 (1957-01-01), Voegeli
patent: 3557829 (1971-01-01), Finley
patent: 3763746 (1973-10-01), Walters
patent: 3927603 (1975-12-01), Bernhoft
Allis-Chalmers Corporation
Nelson Arthur L.
Stouffer Richard T.
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