Valve assembly for pressurized fluid vessel

Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve

Reexamination Certificate

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Details

C137S430000, C137S446000, C141S198000

Reexamination Certificate

active

06910499

ABSTRACT:
A valve assembly for a pressurized fluid vessel such as a propane tank has a housing defining a main fluid passageway therebetween with a valve seat (734) defined in the main passageway, a main valve member (742) movable against the valve seat (734) to block the passageway, an insert (738) defining an internal chamber within the interior of the housing within which the main valve member (742) is disposed, a secondary fluid flow passageway through the insert (738), through a conduit (748) connected to the main valve body, and through openings (751) in an end of the conduit (748) facing second ports opening into the vessel, and a secondary valve member (760) movable to block the openings (751) under the action of a float (721) on a predetermined fluid level being reached, thereby exposing the main valve member (742) to a pressure differential to close the valve.

REFERENCES:
patent: 643906 (1900-02-01), Mrash
patent: 2731030 (1956-01-01), Phillips et al.
patent: 2851055 (1958-09-01), Mosher
patent: 3625264 (1971-12-01), Swain
patent: 4013091 (1977-03-01), Hudson
patent: 4313459 (1982-02-01), Mylander
patent: 5487404 (1996-01-01), Kerger
patent: 5832953 (1998-11-01), Lattner et al.
patent: 6035888 (2000-03-01), Gil
patent: 6076546 (2000-06-01), Waters
patent: 6178994 (2001-01-01), Park
patent: 6293302 (2001-09-01), Waters et al.
patent: 6408869 (2002-06-01), Bartos et al.

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