Hydraulic control for a dozer blade

Details Hydraulic control for a dozer blade Hydraulic control for a dozer blade

1982-06-14

1985-03-19

Hershkovitz, Abraham

Earth working

Mounting for pushed tool at end of motor vehicle

Transversely mounted blade

91420, 91515, 172826, E02F 376, F16B 1100

Patent

active

045053391

ABSTRACT:
A hydraulic circuit for pitch and tilt control of a dozer blade attached to push arms on a vehicle with a pitch ram connected between one push arm and the blade and a dual actuator consisting of a second pitch ram and a tilt ram connected at their head ends. A pitch valve directs hydraulic fluid to and from the pitch rams with a diverter/combiner valve interposed therebetween to assure a flow of fluid either to said rams or from said rams at equal rates. Pilot-operated check valves hydraulically lock the pitch rams until opened by pressure directed from said pitch valve. Tilt and lift valves directs fluid pressure to and from the tilt ram and a lift ram respectively with regeneration capability for both tilt and lift functions.

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: 3481489 (1969-12-01), Stauffer
patent: 3850081 (1974-11-01), Joelson
patent: 3961670 (1976-06-01), Rivinius
patent: 3966066 (1976-06-01), Schexnayder
patent: 3990583 (1976-11-01), Nishida
patent: 4037671 (1977-07-01), Kimber
patent: 4083291 (1978-04-01), Larsson
patent: 4166506 (1979-09-01), Tezuka
patent: 4194436 (1980-03-01), Imada
patent: 4237688 (1980-12-01), Demmers
patent: 4286432 (1981-09-01), Burrows

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