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US 8,939,325 B2Granted
Dispenser for a foaming liquid composition with improved foam recovery feature
AssigneeReckitt & Colman (Overseas) Limited
InventorsZhiHao Liang, XianZhi Zhou
Life of this patent
Estimating the term…
Abstract
A foaming pump mechanism for dispensing a foamable or foaming liquid composition, as well as dispensers for delivery of a foaming or foamable liquid composition therefrom which is operable by a non-contact interaction with the user. The foaming pump mechanism includes foam recovery.
Claims17
A foaming pump mechanism for dispensing a foamable or foaming liquid composition comprising:
- a liquid cylinder in fluid communication with a supply of a foaming or foamable liquid composition and in fluid communication with a dispensing nozzle, the liquid cylinder further including a bore and a liquid cylinder piston moveable with the bore;
- an air cylinder in fluid communication with the dispensing nozzle, the air cylinder further including a bore and an air cylinder piston moveable within the bore;
- and
- a foam recovery cylinder in fluid communication with the dispensing nozzle, the foam recovery cylinder further including a bore and a foam recovery piston within the bore;
- wherein the dispensing nozzle having a body which includes an a liquid inlet port in fluid communication with the liquid cylinder, an air inlet port in fluid communication with the air cylinder, at least one screen within the body of the dispensing nozzle, and downstream of the at least one screen a foam recovery port within a foam recovery zone prior to a nozzle outlet.
2 more elements
A foaming pump mechanism for dispensing a foamable or foaming liquid composition comprising:
- a liquid cylinder in fluid communication with a supply of a foaming or foamable liquid composition and in fluid communication with a dispensing nozzle, the liquid cylinder further including a bore and a liquid cylinder piston moveable with the bore;
- an air cylinder in fluid communication with the dispensing nozzle, the air cylinder further including a bore and an air cylinder piston moveable within the bore;
- and
- a foam recovery cylinder in fluid communication with the dispensing nozzle, the foam recovery cylinder further including a bore and a foam recovery piston within the bore;
- wherein the dispensing nozzle having a body which includes an a liquid inlet port in fluid communication with the liquid cylinder, an air inlet port in fluid communication with the air cylinder, at least one screen within the body of the dispensing nozzle, and downstream of the at least one screen a foam recovery port within a foam recovery zone prior to a nozzle outlet;
- and
- wherein the volumetric ratios of the volumes of the liquid cylinder, the air cylinder and the foam recovery cylinder between the base and peak of their respective stroke cycles is between 1:8-12:0.8-1.2.
4 more elements
Dependencies are inferred from the claim text.