Flow control devices

Details Flow control devices Flow control devices

1993-08-19

1994-11-15

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137504, G05D 701

Patent

active

053638760

ABSTRACT:
A fluid flow device for minimizing the effects of fluctuating pressures on the fluid flow rate has a variable restriction in the fluid path through the device arranged to produce a lesser restriction as the pressure difference between the inlet and outlet of the device increases, and vice versa. This first, variable restriction is formed by an inlet tube and a blocking member. A second, constant restriction for the fluid flow is formed by the tube and a parallel bore through which the tube extends, to produce a pressure drop which creates a pressure differential across a diaphragm balanced by a spring. A change of the pressure differential across the device also changes the pressure differential on the diaphragm, which is connected to the blocking member, so that movement of the diaphragm has the effect of varying the restriction in the manner described to reduce flow rate variations through the device.

REFERENCES:
patent: 2637339 (1953-05-01), Pease
patent: 4186767 (1980-02-01), Caffrey
patent: 4497341 (1985-02-01), Wright
patent: 4513777 (1985-04-01), Wright
patent: 4629561 (1986-12-01), Shirato et al.

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