Flow control valve with dirt protection

Details Flow control valve with dirt protection Flow control valve with dirt protection

1989-08-18

1990-08-14

Rosenthal, Arnold

Fluid handling

With means for separating solid material from the fluid

Sediment chamber

25112905, 25112908, 25112915, 123585, F16K 3106

Patent

active

049478907

ABSTRACT:
A flow control valve includes a hollow cylinder 32 having an open end and a fluid flow port 31 formed in its circumferential wall, a solenoid coil disposed around the cylinder, and a valve member 41 slidable within the cylinder in response to an amount of power supplied to the solenoid coil for adjusting an opening area of the fluid flow port to control the flow rate of the fluid flowing through the fluid flow port and the open end of the cylinder. A protective inner-diameter portion 32a formed in the open end of the cylinder is provided in association with a fluid flow path including the fluid flow port and the open end of the cylinder for preventing any foreign matters entrained in a fluid from being caught in the clearance defined between the hollow cylinder and the valve member by providing an annular clearance between the cylinder and the valve member. A reduced outer-diameter portion 44a axially partially extending from one end of the valve member or a dam plate 10, 11 disposed in the fluid flow path for defining a labyrinth flow path upstream of the fluid flow port may also be provided. At least a cylindrical wall 35, 36 having the fluid flow port of the hollow cylinder may be made of a molded resin.

REFERENCES:
patent: 4339109 (1982-07-01), Kawata et al.
patent: 4452424 (1984-06-01), Kawata
patent: 4627596 (1986-12-01), Busacchi
patent: 4643227 (1987-02-01), Suzuki et al.
patent: 4720078 (1988-01-01), Nakamura et al.
patent: 4817914 (1989-04-01), Pick et al.

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