Liquid dispenser

Claim 1

A dispenser for use with a container of liquid having a vertical neck open at the top, said dispenser comprising: a horizontal flexible diaphragm having a downwardly exending peripheral lip adapted for detachable sealing engagement with the periphery of the open neck whereby the diaphragm covers the neck opening, said diaphragm having a top disposed concave cup-like recess inwardly spaced from said lip centrally disposed therein with a central hole at the bottom thereof; a vertically elongated hollow tubular element having an outwardly flared upper section disposed adjacent but spaced below the diaphragm and adapted for detachable sealing engagement with the periphery of said lip, said section having a side wall which defines an inverted truncated cone with spaced longitudinally extending slots therein, said element having a lower vertical hollow section with an upper opening coincident with the lower end of said cone and a lower opening adapted to extend into the container below the level of the liquid, the element also having a vertical bore extending therethrough, said bore having a first constriction which permits the passage of liquid therethrough disposed in the lower section adjacent but below the upper opening thereof, the bore wall containing a vertical cylindrical recess (spaced outwardly from the interior of the bore and spaced inwardly from the outer surface of the lower element) which communicates at its top end with the interior of the cone and has a closed bottom end disposed below said first constriction; a vertically elongated hollow tube sealed to and extending through said hole has an open top end disposed above said hole in the concave recess and an open bottom end always disposed in the vertical recess, said tube being vertically slidable in said vertical recess, said tube having in its hollow interior a second constriction disposed intermediate the ends thereof, said top tube end having a plurality of horizontal spaced conduits interconnecting the interior of the tube with the interior of said concave recess; and a vertical prong disposed in said bore and the tube interior, the bottom end of the prong being secured in said first constriction without obstructing liquid passage therethrough, the top end of the prong being disposed above and larger than the second constriction, the main body of said prong being slidable through said second constriction with sufficient clearance to permit liquid to flow around said body through said second constriction, said tube having a normal raised position at which the second constriction and said top end are in sealing engagement and define a closed valve through which said liquid cannot pass, said tube having a momentarily lowered position at which said top end is spaced above the second constriction to open said valve and permit passage of said liquid therethrough.