Valves and valve actuation – Fluid actuated or retarded – Compulsory cut-off after flow period
Patent
1983-09-01
1984-09-18
O'Connor, Daniel J.
Valves and valve actuation
Fluid actuated or retarded
Compulsory cut-off after flow period
137244, 251 38, 251 45, F16K 2104, F16K 3112
Patent
active
044719370
ABSTRACT:
A fluid flow control valve in which flow from an inlet (14) to an outlet (16) is controlled by engagement between a surface (92) and a seat (90). The surface (92) is displaced from the seat (90) when a closure member (44) is lifted to permit flow from a control chamber (26) through a bore (42). The resultant pressure drop in the chamber (26) enables pressure externally of the chamber (26) to displace the wall (34) which lifts the spigot 40 and hence the surface 92. When the closure member (44) re-seats, the chamber (26) can fill through a bore (56) and the wall (34) returns to its initial condition to close the valve. An operating member (66) protrudes through a shower rose (20). When the member (66) is pushed up, the piston (70) attempts to slide in the cylinder (74) and causes a pressure increase which thus displaced the cylinder (74 ) and hence the closure member (44). If the operating member (66) is then improperly held in its upper position, leakage between the piston and the cylinder still permits the member (44) to drop and re-engage with its seat in the bore (42).
REFERENCES:
patent: 1295250 (1919-02-01), Yeiser
patent: 1711234 (1929-04-01), Langdon
patent: 2154811 (1939-04-01), Goss
patent: 2181581 (1939-11-01), Fraser
patent: 2833300 (1958-05-01), Sirotek
patent: 3111271 (1963-11-01), Lofgren
patent: 3351316 (1967-11-01), Lewis
patent: 3752174 (1973-08-01), Turolla
patent: 4022380 (1977-05-01), Scragg
patent: 4204557 (1980-05-01), Scragg
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