Circuit for pitch and tilt of dozer blade

Details Circuit for pitch and tilt of dozer blade Circuit for pitch and tilt of dozer blade

1980-02-27

1982-10-05

Hershkovitz, Abraham

Earth working

Mounting for pushed tool at end of motor vehicle

Transversely mounted blade

91517, 91518, 172826, E02F 385, F15B 1122

Patent

active

043523986

ABSTRACT:
A circuit for controlling pitch and tilt of a dozer blade in which two cylinders are connected between the dozer blade and the dozer push arms. One cylinder only is extended and retracted to achieve tilt, and both cylinders are operated in unison to achieve pitch with divider valves assuring that equal volumes of hydraulic fluid reach each cylinder and are expelled from each cylinder. Extension and retraction is selectively determined by a directional control valve, while a selector valve determines whether both cylinders or only one cylinder is connected with the directional control valve.

REFERENCES:
patent: 2460774 (1949-02-01), Trautman
patent: 3033219 (1962-05-01), Erle
patent: 3199539 (1965-08-01), Leathem
patent: 3455320 (1969-07-01), Garman
patent: 3850081 (1974-11-01), Joelson
patent: 3850323 (1974-11-01), Ekstrom
patent: 3961670 (1976-06-01), Rivinius
patent: 3966066 (1976-06-01), Schexnayder
patent: 4083291 (1978-04-01), Larsson
patent: 4094228 (1978-06-01), Schexnayder
patent: 4166506 (1979-09-01), Tezuka
patent: 4194436 (1980-03-01), Imada
patent: 4237688 (1980-12-01), Demmers

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