Flow control valve

Details Flow control valve Flow control valve

1989-12-05

1991-03-12

Rosenthal, Arnold

Fluid handling

Systems

Sequentially progressive opening or closing of plural valves

13763015, F16K 132

Patent

active

049985612

ABSTRACT:
A flow control valve comprising a main valve for opening and closing a fluid conduit, an electromagnetic coil for driving the main valve, a diaphragm responsive to the action of the main valve, a sub-valve chamber partitioned by the main valve and the diaphragm, a sub-valve incorporated in the main valve for opening and closing the sub-valve chamber to a conduit in the secondary side, a projection, protrusively formed on a driving shaft of the electromagnetic coil, responsive to a driving force of the electromagnetic coil for sliding the sub-valve by a predetermined stroke to bring the same in a fully opened state with the main valve remaining in a closed state and thereafter opening the main valve, a bleed orifice provided through a side wall of the main valve for making the pressure in the sub-valve chamber equal to a primary pressure; and a returning spring for urging each of the main valve and the sub-valve in the closing direction.

REFERENCES:
patent: 2949128 (1960-08-01), Carter
patent: 3102555 (1963-09-01), Botkin
patent: 3888280 (1975-06-01), Tartaglia
patent: 3994318 (1976-11-01), Ishigaki
patent: 4342328 (1982-08-01), Matta

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