Fluid handling – Line condition change responsive valves – Line flow effect assisted
Patent
1990-04-05
1990-11-27
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Line flow effect assisted
13750546, G05D 1606
Patent
active
049728717
ABSTRACT:
A self-operated droop compensated regulator includes a spring casing and a lower casing, sandwiching a diaphragm. The lower casing has inlet and outlet ports. A one piece cam stem and relief seat is mounted for movement with the diaphragm and includes a first cam surface for directly engaging a movable disk holder. The disk holder is movable in a straight line within an orifice tube that supports the valve seat. The cam surface moves the disk holder at a nonlinear rate with respect to the diaphragm. A pressure relief mechanism is incorporated within the upper portion of the diaphragm. A bias spring acts, between a second similar cam surface on the opposite side of the stem and the disk holder, to maintain the first cam surface in contact with the disk holder. The orifice tube has a removable boost end cap for providing a boost action to the diaphragm. One type of boost end cap is snapped in position over the end of the orifice tube and has a plurality of fingers with latch portions that engage an annular groove on the orifice tube. One of the fingers has a hook end that forms a guide for the rear of the cam stem in a sliding contact. A hole in the end cap reduces the boost effect. Another type of boost end cap has a pair of arrow-shaped fingers that engage a pair of retention slots in the end of the orifice tube and a guide finger that engages a guide slot on the tube. The end of the guide finger engages the rear of the cam stem.
REFERENCES:
patent: 1893254 (1933-01-01), Sweeney
patent: 1934832 (1933-11-01), Temple
patent: 2192327 (1940-03-01), Palmer
patent: 2967536 (1961-01-01), Stratman
patent: 3086548 (1963-04-01), Galiger et al.
patent: 3207175 (1965-09-01), Pauly
patent: 3261761 (1965-12-01), Kreuter
patent: 4889158 (1989-12-01), Rice et al.
Hood Mark E.
Rice Donald D.
Camasto Nicholas A.
Cole Arnold H.
Fisher Controls International Inc.
Hepperle Stephen M.
Kubly Dale A.
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