Container for dispensing a viscous liquid medium

Claim 1

A container from which a viscous liquid contained therein is selectively dispensible, said container comprising: a tubular body for containing a supply of liquid, said body having a hollow interior open at one end of the body; a valve body disposed on said container body proximate the open end thereof; a piston proximate an end of said body opposite its open end and arranged for displacement along said hollow interior toward said open end; a resiliently deformable container top on said tubular body at said open end and substantially closing the same, said top including an aperture defined therethrough communicating with said hollow interior, said top being selectively deformable from a normal position to a dispensing position substantially in the direction of said hollow interior of the container body and thence resiliently returnable to said normal position; and an elongated dispensing mouthpiece fixedly secured to said top and extending through said aperture thereof, said mouthpiece including an open mouth disposed exteriorly of said container body and at least a valve opening disposed within the hollow interior of said body, and said mouthpiece further including a passage for liquid communication extending between said open mouth and said valve opening of the mouthpiece; said valve opening being so defined in the mouthpiece that in said normal position of the container top the valve opening is closed by said valve body whereas deformation of the top to its dispensing position correspondingly carries the mouthpiece to move the valve opening therein to a position remote from said valve body to enable liquid contained in the tubular body to dispensingly flow through said valve opening and out of said container through the open mouth under the increased interior container pressure created by the inwardly directed deformation of said container top from its normal to its dispensing condition; said tubular body having a substantially continuous sidewall bounding the hollow interior of said body, and said valve body comprising an annular ring supported in radially inwardly spaced relation from said sidewall proximate said container open end and through which said mouthpiece relatively movably extends such that said valve opening of the mouthpiece is disposed within said annular ring in said normal position of the container top to close the valve opening and prevent the flow of liquid contained in the tubular body dispensingly through the mouthpiece, while in said dispensing position of the container top the mouthpiece is relatively moved with respect to said annular ring so that the valve opening is correspondingly carried to a position remote from the annular ring to permit the flow of liquid through the opening and out of said container.