Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1992-05-08
1993-01-05
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
122504, 137341, 137426, 137428, 137430, 137572, 141198, 222 56, 222 68, 251 65, F16K 3128, F16K 3300
Patent
active
051761670
ABSTRACT:
A control valve includes a vertical housing having an upper float chamber, a lower valve chamber, and a valve seat support which is provided between the float chamber and the valve chamber, defines a passage communicating the float chamber and the valve chamber and has a bottom valve seat above the valve chamber. An inlet conduit extends outwardly from the housing and has an inlet and an outlet communicated with the valve chamber. An outlet conduit extends outwardly from the housing and has an inlet communicated with the passage and an outlet. A shaft is movable vertically, is provided inside the housing and has a valve block mounted on a bottom end of the shaft. An upper and a lower stop are respectively fixed on the shaft. An upper and a lower float are respectively movably sleeved around the shaft between the upper and lower stops. A perforated partition is mounted inside the housing between the upper float and the lower float. A metal member is mounted on the upper float, and a magnetic member is mounted on an upper end of the housing.
REFERENCES:
patent: 879557 (1908-02-01), Ledoux
patent: 1548298 (1925-08-01), Woodard
patent: 2691386 (1954-10-01), Madison
patent: 2886056 (1959-05-01), Ratliff
patent: 3186598 (1965-06-01), Jonsson
patent: 3189063 (1965-06-01), Lowe
patent: 3817261 (1974-06-01), Rogge
patent: 4263932 (1981-04-01), Laar et al.
patent: 4300311 (1981-11-01), Marchant
patent: 4399835 (1983-08-01), Holderith
patent: 4944326 (1990-07-01), Hsieh
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