Device for setting blade of earthmover

Details Device for setting blade of earthmover Device for setting blade of earthmover

1979-01-12

1981-01-06

Johnson, Richard J.

Earth working

Mounting for pushed tool at end of motor vehicle

Transversely mounted blade

91401, 91511, 91520, E02F 376

Patent

active

042431069

ABSTRACT:
A device for varying the angular setting of the blade of an earthmoving vehicle by means of a pair of double acting hydraulic cylinders in which only one of the cylinders receives pressure direct from a pump. The piston of that cylinder acts on one end of the blade and at the same time transmits pressure fluid through a hydraulic circuit to the piston of the other cylinder acting on the other end of the blade whereby the two pistons move in opposite directions. The hydraulic circuit includes a control valve for reversing the direction of movement of the pistons, the same cylinder being pressurized by the pump in both directions of movement of the pistons. Pressure fluid leakage loss compensating means are provided in each piston.

REFERENCES:
patent: 3004524 (1961-10-01), McCay
patent: 3184869 (1965-05-01), Olsen
patent: 3311026 (1967-03-01), Crisp
patent: 3315570 (1957-04-01), Brewer
patent: 3515224 (1970-06-01), Seaberg
patent: 3581829 (1971-06-01), Frisbee
patent: 3631930 (1972-01-01), Peterson
patent: 3705631 (1972-12-01), Seaberg
patent: 3774696 (1973-11-01), Horsch
patent: 4067394 (1978-01-01), Deckler

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