Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1978-06-16
1980-09-23
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
60418, G05D 1610
Patent
active
042236940
ABSTRACT:
In a hydraulic circuit breaker comprising a housing with an inlet orifice connectable to the outlet of a hydraulic pump, a first outlet orifice connectable to the pressure chamber of a hydraulic pressure accumulator, and a second outlet orifice connectable to an open-center hydraulic circuit, a stepped bore in said housing, a piston of the differential type slidable in a fluid-tight manner in said bore and defining therewith an inlet chamber communicating with the inlet orifice and a control chamber, a constriction orifice of variable cross-section being provided between the inlet chamber and the second outlet orifice, and said inlet chamber communicating with said control chamber through a first passage comprising a first restriction and being also connected to the first outlet orifice by a connection comprising a non-return valve, there is further provided a resilient vessel having a variable-volume compartment connected to said control chamber, said vessel being adapted to connect said compartment to a second leakage passage forming a restriction when the pressure in said compartment reaches a first predetermined value, and to interrupt said connection to said leakage passage when the pressure in said compartment falls below a second predetermined value.
REFERENCES:
patent: 2846850 (1958-08-01), Hall
patent: 3393945 (1968-07-01), Reichard
patent: 3752176 (1973-08-01), King
patent: 3785393 (1974-01-01), Tanguy
patent: 3915186 (1975-10-01), Thomas
patent: 4016895 (1977-04-01), Budecker
patent: 4073140 (1978-02-01), Lang et al.
patent: 4131125 (1978-12-01), Tanguy
patent: 4137941 (1979-02-01), Gonin
Cohan Alan
Decker Ken C.
Schoenle Paul David
Societe Anonyme D.B.A.
Spiegel H. Jay
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