Hydraulic system for a working machine

Details Hydraulic system for a working machine Hydraulic system for a working machine

1975-02-13

1977-02-01

Schwadron, Martin P.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

91 6, 91412, 91413, 91448, 137101, 137599, F15B 1304

Patent

active

040056368

ABSTRACT:
A hydraulic system for a working machine of the vehicle type having a power steering mechanism and a hydraulically powered working implement, such as a back-hoe implement. A hydraulic valve is inclined in the power steering mechanism, and another hydraulic valve operates the powered implement. A flow control valve divides flow between the aforementioned two valves, and a pump supplies the flow in the system. Pressure relief valves are included in the system, such that one relief valve senses pressure in the power steering branch of the system, and that relief valve responds to the lowest hydraulic pressure, and a relief valve for the powered implement responds to a higher hydraulic pressure. Only a single hydraulic pump is required for the power steering and the powered implement.

REFERENCES:
patent: 3047171 (1962-07-01), Long
patent: 3216444 (1965-11-01), Herner
patent: 3385311 (1968-05-01), Allen
patent: 3454046 (1969-07-01), Lanctot
patent: 3568868 (1971-03-01), Chichester
patent: 3575254 (1971-04-01), Sipos
patent: 3642019 (1972-02-01), Kramer et al.
patent: 3703186 (1972-11-01), Brewer
patent: 3771424 (1973-11-01), Allen
patent: 3782249 (1974-01-01), Drone
patent: 3834278 (1974-09-01), Goff
patent: 3854380 (1974-12-01), Casey

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