Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1985-10-11
1987-01-20
Schwadron, Martin P.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137495, 25112902, 25112918, G05D 1606, G05D 1620
Patent
active
046374299
ABSTRACT:
A fluid pressure regulating valve having a two-stage high and low flow rate control capability combined with a natural-LP gas control pressure changeover uses a spring biased pressure regulating diaphragm controlling a fluid through an orifice defined by a valve seat. A solenoid valve armature is attached to a spring providing the spring bias for the diaphragm and is arranged to be actuated by a selectively energizable solenoid coil. An extension of the armature is captured by a step regulator assembly which is threaded into a valve body containing the regulating diaphragm. The high fire and low fire adjustments in the step regulator assembly are on non-moving threaded members attached to the regulator assembly and bearing on the extension of the armature to vary the energized and deenergized position of the solenoid armature. A positive temperature coefficient material heated by an energizing current for the solenoid operating the valve is located in an energizing circuit of the solenoid coil to provide a change in the energization of the solenoid coil after a threshold temperature of the material is reached. The natural-LP gas pressure changeover utilizes a cam encircling the extension of the armature and a stop means resting on the cam while supporting the end of the armature extension. A screw driver slot is provided for varying the position of the stop member on the cam surface to provide stable natural and LP gas operating positions.
REFERENCES:
patent: 2147945 (1939-02-01), Hann et al.
patent: 3006362 (1961-10-01), Spence
patent: 3342451 (1967-09-01), Matousek
patent: 3451421 (1969-06-01), Vicenzi et al.
patent: 3645495 (1972-02-01), Aymar
Dietiker Paul
Nelson Marvin D.
Halista Mitchell J.
Hepperle Stephen M.
Honeywell Inc.
Joike Trevor B.
Schwadron Martin P.
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