Fluid handling – Systems – Multi-way valve unit
Patent
1986-04-18
1987-08-25
Scott, Samuel
Fluid handling
Systems
Multi-way valve unit
251118, 251265, 2513353, 251355, 137238, F16K 11044
Patent
active
046886010
ABSTRACT:
A plug or poppet valve is positioned in relation to an opening for controlling flow through the opening, with a flange positioned over the side opening and having a portion extending into the interior of the housing towards the plug or poppet, said flange and its extended portion having a circular cross-section opening therethrough, said opening having an interior pre-determined pitch thread over a lower portion of its length. There is also provided a primary valve stem rotatably mounted in the circular cross-section opening and having an exterior thread adapted to co-act with said interior thread, said valve stem having a concentric circular opening in its lower portion containing an interior pre-determined pitch thread and having an upper portion adapted to be connected to a valve drive system, a secondary valve stem rotatably mounted in the concentric circular opening and having an exterior thread over its upper end adapted to co-act with the interior thread in the circular opening in the primary valve stem and having a lower section connected to the valve closure mechanism, and a cylindrical metal bellows sealably connected at its upper end to the said flange and at its lower end to the lower end of the secondary valve stem such as to isolate liquid flow in the interior of the valve from the valve stems, said bellows being of a length to allow movement of the primary valve stem from a fully valve closed position to a fully open position.
REFERENCES:
patent: 633217 (1899-09-01), Qurin
patent: 1203371 (1916-10-01), Lowe
patent: 1298173 (1919-03-01), Cadman
patent: 1547962 (1925-07-01), Seewer
patent: 2252923 (1941-08-01), Granetz
patent: 2356748 (1944-08-01), Boynton
patent: 2750961 (1956-06-01), Uritis
patent: 3157831 (1964-11-01), Ray
patent: 3194264 (1965-07-01), Greco
patent: 3428291 (1969-02-01), Callahan, Jr. et al.
patent: 3550903 (1970-12-01), Hauser
Flanigan Allen J.
Scott Samuel
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