Flow control valve

Details Flow control valve Flow control valve

1994-06-16

1995-12-26

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

251368, G05D 1620

Patent

active

054778786

ABSTRACT:
A flow control valve having a housing having a first port and a second port and a spool mounted in the housing. A first fluid chamber and a second fluid chamber which impart a fluid pressure to both ends of the spool communicate with each other through a fluid passage formed with an orifice. As the spool moves, thrust to the spool produced by a difference in pressure at both ends of a spool balances with a biasing force produced by the biasing mechanism. The flow control valve is provided with an annular seal made of an elastic material together with a seal member. When the edge of the land portion on the outer periphery of the spool is brought into contact with the annular seal, the first port is completely shut off from the second fluid chamber. Thus, leakage will become zero when the valve portion is closed.

REFERENCES:
patent: 2441220 (1948-05-01), Dixon
patent: 2633147 (1953-03-01), Badami
patent: 2938704 (1960-05-01), Quail
patent: 2984261 (1961-05-01), Kates
patent: 3112764 (1963-12-01), Anderson et al.
patent: 3188048 (1965-06-01), Sutherland
patent: 4648424 (1987-03-01), Takahashi et al.
patent: 5181534 (1993-01-01), Hashida et al.
patent: 5280805 (1994-01-01), Skoglund

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