Hydraulic valve inlet unloaders

Details Hydraulic valve inlet unloaders Hydraulic valve inlet unloaders

1985-01-14

1986-02-11

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

13759612, F15B 1308

Patent

active

045693676

ABSTRACT:
An inlet unloader valve is provided for insertion ahead of one or more open center valve work sections having a pressure beyond port, which unloader valve has a spring biased spool, normally closing communication from the inlet to exhaust and proportionally opened by signal pressure from the pressure beyond port and the inlet and exhaust chambers to control flow through the work sections.

REFERENCES:
patent: 3718159 (1973-02-01), Tennis
patent: 3771558 (1973-11-01), Ailshie
patent: 4139021 (1979-02-01), Ailshie et al.
patent: 4178962 (1979-12-01), Tennis

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