Squeeze bottle with hydrostatic passage to restrain leakage

Claim 2

A two piece pumpable material dispenser comprising: a container having flexible top and sidewalls which are integral and nonprevious extending above a lower end opening that is closed off by a removable base to define a storage chamber; said base being generally cup-shaped and fitting upwardly into said opening, said base having a portion forming a depression for said chamber, and an outlet tube secured to said base and having an inlet end in said depression and extending upwardly therefrom to form a riser and then downward through said base to an outlet, said inlet and outlet of said tube being above the bottom of said container opening, and whereby a greater hydrostatic head exists on the end of said opening than exists on said outlet of said tube to prevent air leakage into said container between said opening and base.

Claim 3

The dispenser of claim 1 wherein said outlet tube is an inverted U-shaped tube having a height less than approximately 10 times the inside diameter of said tube.

Claim 4

A squeeze bottle comprising: a container having an open end with integral nonprevious walls above said open end and a sidewall portion around said open end with internal threads on said sidewall portion, said container having at least a portion that is collapsible inwardly and flexibly biased outwardly, a generally cup-shaped base for said container, said base having external thread on the upper end portion thereof for engagement with said internal threads of said container, said base having a top wall having a depression in one area and forming a dome in another area, and an inverted U-shaped tube on said base with its inlet end in said depressions and its outlet end projecting through said dome and terminating above the lower end of said open end of said container, and whereby a greater hydrostatic head exists on said lower end of said open end than exists on the outlet end of said U-shaped tube to prevent air leakage into said container between its open end and said base.

Claim 5

A squeeze bottle comprising: a container having an open end with integral nonprevious walls above said open end and a sidewall portion around said open end with internal threads on said sidewall portion, said container having at least a portion that is collapsible inwardly and flexibly biased outwardly, a generally cup-shaped base for said container, said base having external thread on the upper end portion thereof for engagement with said internal threads of said container, said base having a top wall having a depression in one area and forming a dome in another area, and an inverted U-shaped tube on said base with its inlet end in said depressions and its outlet end projecting through said dome and terminating above the lower end of said open end of said container, and whereby a greater hydrostatic head exists on said lower end of said open end than exists on the outlet end of said U-shaped tube to prevent air leakage into said container between its open end and said base.

Claim 6

The squeeze bottle of claim 3 wherein both said inlet and said outlet of said U-shaped tube are positioned above the lower end surface of said container.

Claim 7

The squeeze bottle of claim 4 wherein said base has an external upwardly facing shoulder at the lower end of said threads, with said lower end of said container sealingly abutting said shoulder.

Claim 8

The squeeze bottle of claim 4 wherein the top surface of said depression is below the bottom surface of said dome.

Claim 9

The squeeze bottle of claim 6 wherein the height of said inverted U-shaped tube is no more than approximately 10 times the inside diameter of said tube.