Dispensing – With lock or fastening seal – Inhibiting operation of flow controller or closure
Patent
1997-07-28
1998-09-08
Huson, Gregory L.
Dispensing
With lock or fastening seal
Inhibiting operation of flow controller or closure
222212, 222495, B67D 532
Patent
active
058033149
ABSTRACT:
A tapered valve seat and mating valve member are in fluid communication with a squeezable 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 conduits in the valve member and stem. A gradually curved undulating valve chamber ceiling wall engages a complementary curved shoulder on the valve member for limiting the axial displacement of the valve member between a locked state and a plurality of settable maximum valve interface clearances valve open states according to the relative annular positions of the shoulder to the chamber wall. The interface clearance and thus the valve maximum open position is set according to fluid viscosity to retain fluid therein to preclude ambient air passing to the container interior in response to a negative pressure in the container. This creates forces which close the valve in each relative position. A disc-like handle knob attached to the stem overlies the housing for manually rotating the valve member open and closed and for receiving indicia indicating the relative maximum clearances at the valve interface.
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Huson Gregory L.
Squire William
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