Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Reexamination Certificate
2004-07-28
2010-06-01
Rivell, John (Department: 3753)
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
C123S511000, C123S512000
Reexamination Certificate
active
07726329
ABSTRACT:
The inventive discharge rate and pressure control solenoid valve (1) is used for a circuit consisting of a low pressure part and a high-pressure part and controls the discharge rate of a low-pressure fluid with the aid of a sliding spool (18) in a liner (22) provided with at least one fluid feeding orifice (20) and one fluid exhausting orifice (21) respectively. Said spool (18) is electrically actuated by means of an electromagnet acting in an opposite direction to recoil means (26) for closing the passage between the feeding (20) and exhausting (21) orifices when a control current for the electromagnet is equal to zero and for gradually opening said passage according to a threshold value of the flow, the pressure control being applicable to a high-pressure fluid. The recoil means (26) are inserted between the spool (18) and a flap device which closes an inlet orifice in the liner (22) of a high pressure fluid and is connected to the low-pressure fluid feeding orifice at least at a slide position corresponding to the control current when it is less than said threshold value. The recoil means (26) are positioned and dimensioned in such a way that the flap is openable when the current is equal to or near zero in order to drop the pressure in the high pressure circuit.
REFERENCES:
patent: 3193250 (1965-07-01), Good et al.
patent: 7270113 (2007-09-01), Hervault et al.
patent: 2002/0083985 (2002-07-01), Neuhaus et al.
patent: 2004/0123841 (2004-07-01), Kelly
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patent: 19632368 (1998-02-01), None
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Translation of W098/45594.
International Search Report re PCT/FR2004/002017 (2 pages).
Delphion English Abstract for DE 297 05 635 (3 pages).
Armiroli Jean
DeSaint Gérard
Lhermitte Bruno
Magnaval Jean-Louis
Borg-Warner Inc.
Reising Ethington P.C.
Rivell John
Schneider Craig M
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