Tractor with three-point linkage connecting scraper thereto and

Details Tractor with three-point linkage connecting scraper thereto and Tractor with three-point linkage connecting scraper thereto and

1983-05-02

1985-08-20

Stouffer, Richard T.

Earth working

Automatic power control

172 45, 1724451, 172446, A01B 6502

Patent

active

045358478

ABSTRACT:
A seated-operator type tractor has a vehicle proper (1), equipped rearwardly thereof with a link mechanism (6) and a scraper (9) for ground-leveling. The vehicle (1) is further provided with: a position-controlling mechanism (34) for controlling up-and-down position of the scraper (9); an automatic control mechanism for maintaining the scraper (9) in its left-and-right horizontal posture, by a sensor (50) therefor; a controlling valve (24) for controlling blade-angle adjustment of the scraper (9); and a manual switch (47) disposed near at hand of the seated operator, for shifting over the vehicle (24).

REFERENCES:
patent: 3731746 (1973-05-01), Walberg
patent: 3750757 (1973-08-01), Saetti
patent: 4019585 (1977-04-01), Dezelan
patent: 4120364 (1978-10-01), Wooldridge
patent: 4276975 (1981-07-01), Jenkins
patent: 4337833 (1982-07-01), Welch
patent: 4337959 (1982-07-01), Bettin et al.
patent: 4393942 (1983-07-01), Mijot et al.

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