Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1974-03-25
1976-05-11
Wayner, William E.
Fluid handling
Line condition change responsive valves
Direct response valves
236 49, 251337, G05D 700, F24F 1104
Patent
active
039555950
ABSTRACT:
A fluid flow regulating device for use in fluid handling systems which is capable of maintaining substantially constant flow rates over a wide range of variations in system pressure. The device includes a housing having disposed therein a conduit whose lateral wall includes one or more apertures of a predetermined configuration. A piston is disposed within the conduit and is axially displaceable, in response to pressure differentials, throughout the portion of the conduit wherein the apertures are located. A spring mechanism having a specified non-linear coefficient of stiffness is employed to yieldably resist downstream displacement of the piston. The piston and aperture together form a variable area flow passageway through which substantially all the fluid must pass. A pneumatic, thermometric mechanism may also be employed to displace the piston within the conduit in response to changes in temperature and independent of pressure variations. Finally, the device may be arranged so that its sole source of energy is derived from the air flow being regulated, thus eliminating any need for an external energy source.
REFERENCES:
patent: 2925826 (1960-02-01), Streeter
patent: 2928414 (1960-03-01), Streeter
patent: 2929402 (1960-03-01), Streeter
patent: 2941401 (1960-06-01), Streeter
patent: 3131716 (1964-05-01), Griswold et al.
patent: 3255963 (1966-06-01), Gorchev et al.
patent: 3540484 (1970-11-01), Brown et al.
Powers Regulator Company
Wayner William E.
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