Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1981-05-15
1982-09-21
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137441, 251 44, F16K 3126, F16K 3300
Patent
active
043501788
ABSTRACT:
A ball cock assembly (10) mounted to a water supply pipe (12) in a fill tank includes a valve housing (16) in which is mounted a valve (18) for regulating the flow of water through the ball cock assembly (10). The valve housing (16) includes a central passage (40) having chambers (42, 46) of differing diameters. The chamber (46) is in fluid communication with tank fill tube (22) and back fill tube (24). The valve (18) is generally cylindrical in configuration and includes an upwardly facing first piston surface (76) and a downwardly facing second piston surface (84) upstream of the first piston surface (76). The valve (18) also includes first and second shoulders (78, 80) which seat against valve seats (44, 48) in the central passage (40) of the housing (16). The valve (18) includes an orifice (90) therethrough which communicates fluid through chamber (42) above the first piston surface (76 ). The valve (18) also includes ports (54) which are selectively aligned with the outlets of the valve housing during reciprocation of the valve (18). The valve is biased toward a closed position by a conventional float (20). In operation, a gradual closing of the valve (18) is provided by a differential fluid pressure acting against the first and second piston areas (76, 84).
REFERENCES:
patent: 571023 (1896-11-01), Scott
patent: 951172 (1910-03-01), Biedenmeister
patent: 1042775 (1912-10-01), English
patent: 2198416 (1940-04-01), Robertshaw
patent: 2271419 (1942-01-01), Egan
patent: 2302274 (1942-11-01), Svirsky
patent: 2799290 (1957-07-01), Svirsky
patent: 2995144 (1961-08-01), Manning et al.
patent: 3543795 (1970-12-01), Schwindt
Nelson Merritt J.
Nelson Merritt S.
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