Dispensing – With lock or fastening seal – Inhibiting operation of flow controller or closure
Patent
1996-10-02
1998-07-21
Huson, Gregory L.
Dispensing
With lock or fastening seal
Inhibiting operation of flow controller or closure
222493, 222495, 222212, B67B 500
Patent
active
057823863
ABSTRACT:
An annular tapered valve seat and mating valve on a valve member are secured in fluid communication with a container interior. Fluid in the container under pressure axially displaces the valve from its seat, flows through the interface between the valve and seat and is discharged through a transverse conduit in the valve member and an axial central conduit in the valve member stem which is sealingly engaged with a bore in the housing with annular ribs for guiding the stem. A tapered valve chamber wall engages a shoulder on the valve member for limiting the axial displacement of the valve member to retain fluid in the interface in the absence of container pressure above ambient. The fluid in the interface precludes ambient air passing to the container interior so that a negative pressure in the container results in ambient air pressure forcing the valve to its closed position. A disc-like handle knob is attached to the stem and overlies the stem and housing to form a manual grip for rotating the valve member to open and locked states formed by a ridge on the shoulder which engages the chamber wall in the locked state.
REFERENCES:
patent: 963836 (1910-07-01), Varlie
patent: 1721666 (1929-06-01), Lee
patent: 3165242 (1965-01-01), Jackson
patent: 3490658 (1970-01-01), Schwartzman
patent: 3817284 (1974-06-01), Daugherty
patent: 3887116 (1975-06-01), Ishikawa et al.
patent: 4203536 (1980-05-01), Lester
patent: 4253588 (1981-03-01), Lester et al.
Huson Gregory L.
Squire William
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