US 5,850,908 AGranted

Pressure sensitive cap closure and valve

OwnerSidney Joseph Jasekinventor

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Abstract

A closure cap valve apparatus for mounting on the top of a beverage container. A piston valve within the cap is biased towards closure to prevent spillage. Additionally, pressure increase within the container is directed to increase sealing force of seals positioned on the piston and thus prevents the release of pressure from the container, allowing the closure to be used for carbonated beverages. The piston is displaced from the closed position, even when the container internal pressure is increased, by the user sucking on a mouth piece.

Claims10

Dependent claims

A closure apparatus for attachment to a mouth piece of a container, comprising;

a) a cap valve body, comprising a connecting portion providing a means for connecting the apparatus to the mouth piece of the container, an inner cylinder having one end vented to ambient air and the other end open to a dispensing end, said cylinder further having a central fluid delivery port positioned between the ambient and dispensing ends of the cylinder, said delivery port providing a passageway from an interior of the container to the cylinder,
b) a moveable piston disposed within said cylinder and a means biasing piston displacement toward the ambient end of the cylinder, said piston further having a bottom end positioned near the ambient end of the cylinder and a top end positioned near the dispensing end of the cylinder, the piston further having a circumferencially positioned fluid delivery groove area positioned between the bottom and top ends and a fluid delivery passageway traveling between the delivery groove and the top end of the piston,
c) three ring seals positioned on the piston, comprising;
one bottom seal positioned near the bottom end of the piston, one top seal positioned near the top end of the piston, and a middle seal positioned between the top and bottom seals, the seals are further positioned on the piston so that when the piston is biased fully toward the ambient end of the cylinder the cylinder delivery port is positioned between the top and middle seals providing no communication between the interior of the container and the dispensing end of the cylinder and when the piston is displaced toward the dispensing end of the cylinder the delivery port is positioned between the middle and bottom seals providing communication between the interior of the container and the dispensing end of the cylinder through the fluid delivery groove, and
d) a means for allowing air to travel from an outside of the container to the interior of the container when air pressure outside the container exceeds pressure inside the container.

2 more elements

Dependencies are inferred from the claim text.

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Abstract

A closure apparatus for attachment to a mouth piece of a container, comprising;

a) a cap valve body, comprising a connecting portion providing a means for connecting the apparatus to the mouth piece of the container, an inner cylinder having one end vented to ambient air and the other end open to a dispensing end, said cylinder further having a central fluid delivery port positioned between the ambient and dispensing ends of the cylinder, said delivery port providing a passageway from an interior of the container to the cylinder,
b) a moveable piston disposed within said cylinder and a means biasing piston displacement toward the ambient end of the cylinder, said piston further having a bottom end positioned near the ambient end of the cylinder and a top end positioned near the dispensing end of the cylinder, the piston further having a circumferencially positioned fluid delivery groove area positioned between the bottom and top ends and a fluid delivery passageway traveling between the delivery groove and the top end of the piston,
c) three ring seals positioned on the piston, comprising;
one bottom seal positioned near the bottom end of the piston, one top seal positioned near the top end of the piston, and a middle seal positioned between the top and bottom seals, the seals are further positioned on the piston so that when the piston is biased fully toward the ambient end of the cylinder the cylinder delivery port is positioned between the top and middle seals providing no communication between the interior of the container and the dispensing end of the cylinder and when the piston is displaced toward the dispensing end of the cylinder the delivery port is positioned between the middle and bottom seals providing communication between the interior of the container and the dispensing end of the cylinder through the fluid delivery groove, and
d) a means for allowing air to travel from an outside of the container to the interior of the container when air pressure outside the container exceeds pressure inside the container.

2 more elements