Two-stage flow divider with constant orifice first stage in hydr

Details Two-stage flow divider with constant orifice first stage in hydr Two-stage flow divider with constant orifice first stage in hydr

1988-07-01

1989-08-15

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

91532, B62D 508, F15B 1306

Patent

active

048562777

ABSTRACT:
A hydraulic flow divider has first and second (147, 148) flow control valves each dividing its inflow into two flows. The constant orifice first flow control valve (147) divides flow to outlets (151) and (153). Flow from outlet (151) is then divided by the second valve (148). One of the output flows of the second valve is generated by a constant orifice and directed to a power steering cylinder. Any secondary output from the second valve is generated by a pressure relief valve (152), joins flow from outlet (153), and passes to a hydraulic lift cylinder. The arrangement secures a significant flow rate for lift cylinder operation at low pump drive engine speeds at which pump output flow is low.

REFERENCES:
patent: 3590688 (1971-07-01), Brannon
patent: 4430926 (1984-02-01), Wallace
patent: 4454716 (1984-06-01), Rali
patent: 4566477 (1986-01-01), Barker et al.
patent: 4573319 (1986-03-01), Chichester
patent: 4663936 (1987-05-01), Morgan

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