Valves and valve actuation – With correlated flow path – Tank
Patent
1985-09-30
1987-03-17
Chambers, A. Michael
Valves and valve actuation
With correlated flow path
Tank
251315, 251363, F16K 5100, F16K 500
Patent
active
046501576
ABSTRACT:
A ball valve for controlling upstream to downstream fluid flow, for example, from an apertured tank bottom, has a housing body for bolted-on mounting. The housing has a flow passageway therethrough that angles between its upstream and downstream portions and that is controlled by a valve ball rotatably positioned in and sealed-off within its upstream portion. A resilient, L or ladle-shaped annular gasket is positioned upstream at the joint between the valve housing and the tank bottom and in engagement with the ball adjacent an upstream end portion of its open-end flow passage and, in such a manner as to maintain the flow area of such passage. A rigid annular back-up ring fits and outwardly abuts within and against the gasket in such a manner as to provide a three-way pressure seal of the gasket in which the ball is sealed off with respect to the flow-passageway, the housing is sealed-off with respect to the ring, and the ring is sealed-off with respect to the tank bottom when the housing is bolt-secured to project from the tank bottom. An operating stem for the ball is provided with a key-like, operating end portion to axially receive a complementary bore of an operating handle.
REFERENCES:
patent: 2768806 (1956-10-01), Koehler
patent: 3367623 (1968-02-01), Piel
patent: 3370825 (1968-02-01), Scaramucci
patent: 3455534 (1969-07-01), Scaramucci
patent: 3554484 (1971-01-01), Gachot
patent: 3591131 (1971-07-01), Carlson
patent: 3614056 (1971-10-01), Alvarez
patent: 3661355 (1972-05-01), Rawstron et al.
patent: 4137935 (1979-02-01), Snowdon
patent: 4206904 (1980-06-01), Dante
Block Gary C.
Sillaman Ronald L.
Chambers A. Michael
Pittsburgh Brass Manufacturing Co.
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