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US 8,985,390 B2Granted
Unit dose dispensing apparatus
AssigneeThe Procter & Gamble Company
InventorsGene Michael Altonen, Sean Donald Riggenbach
Life of this patent
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Abstract
A composition dispensing apparatus which can deliver an repeatable and accurate unit dose of a composition including: a compressible container; a unit dose delivery system comprising an entry element, an exit element, side walls and a dosage chamber; a dispensing aperture; wherein the linear movement ratio of the exit element to the entry element is about 1 or less.
Claims16
A composition dispensing apparatus comprising:
- (a) a compressible container;
- (b) a unit dose delivery system comprising an entry element, an exit element, side walls and a dosage chamber;
- (c) a dispensing aperture;
- wherein the linear movement ratio of the exit element to the entry element is less than 1, wherein the unit dose delivery system comprises at least one protuberance on the side walls between the entry element and exit element, and wherein the at least one protuberance prevents the entry element from pushing additional composition from the dosage chamber through the dispensing aperture after a unit dose is delivered.
1 more element
A method of delivering a unit dose of a composition comprising:
- (a) squeezing a compressible container containing a flowable composition;
- (b) filling a dosage chamber with the flowable composition, wherein the dosage chamber comprises an entry element and an exit element and side walls;
- and wherein the entry element and the exit element are in mechanical connection with each other;
- and further wherein the entry element and the exit element form seals by engaging the side walls;
- wherein the linear movement ratio of the exit element to the entry element is less than 1;
- (c) moving the entry element and the exit element with the flowable composition;
- (d) disengaging the seal of the exit element from the side walls at the same time or after engaging the seal of the entry element from the side walls;
- and
- (e) dispensing the flowable composition through a dispensing aperture;
- wherein the unit dose delivery system comprises at least one protuberance on the side walls between the entry element and exit element, and wherein the at least one protuberance prevents the entry element from pushing additional composition from the dosage chamber through the dispensing aperture after the unit dose is delivered.
7 more elements
Dependencies are inferred from the claim text.