Pump closure for carbonated beverage container

Details Pump closure for carbonated beverage container Pump closure for carbonated beverage container

1986-11-12

1988-02-09

Norton, Donald F.

Bottles and jars

Closures

Combined or convertible

B65D 5124

Patent

active

047236701

ABSTRACT:
A hand-operated pump is combined with a closure cap for sealing and pressurizing the open space within a carbonated beverage container. A pump cylinder is integrally formed with a closure screw cap and is insertable through the neck of the beverage container. A piston is coupled by a retainer ring for extension and retraction through the pump cylinder. The piston carries a floating seal which is axially movable along a reduced diameter portion of the piston for opening and closing an air inlet port between an air supply annulus and a compression chamber. The pump includes an improved check valve assembly in which a compressed air discharge port is sealed by a resilient membrane which engages a tapered sealing surface which is coincident with the compressed air discharge port.

REFERENCES:
patent: 3557986 (1971-01-01), Poole
patent: 3602387 (1971-08-01), Patnaude et al.
patent: 3853222 (1974-12-01), Helms
patent: 4033091 (1977-07-01), Saponara
patent: 4287819 (1981-09-01), Emerit
patent: 4524877 (1985-06-01), Saxby et al.

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