Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1974-11-25
1976-03-09
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137117, G05D 701
Patent
active
039425487
ABSTRACT:
A fluid control valve, which relates to fluid control valves in which a pilot passage is opened or closed as a pilot flow is detected in the said pilot passage by means of a limit orifice mechanism located at the middle of the flow and a valve spool is switched by the differential pressure produced in the fluid passing the said limit orifice mechanism so as to effect a switch-over between unloaded and loaded states, and incorporates, as the said valve spool, a first valve spool effecting the switching action based on the differential pressure of the fluid passing the limit orifice mechanism and a second valve spool arranged in series with the first valve spool effecting a switching action being effected by the fluid pressure so that a load check function may also be provided.
REFERENCES:
patent: 2053330 (1936-09-01), Fitch
patent: 2665704 (1954-01-01), Kanuch
patent: 2808068 (1957-10-01), Thomas
Doi Yasuo
Murata Hikaru
Sakurai Yasusada
Umeda Yasuji
Jecies Saul
Kayabakogyokabushikikaisha
Nilson Robert G.
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