Patent ID: 11857985
Assignee: PACIFIC MARKET INTERNATIONAL, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  A | IPC A  B

Claim 48:
49. An airpot beverage dispenser for dispensing a beverage, comprising:
a container body with a body upper end portion and a beverage cavity for holding the beverage;
a lid attachable to the body upper end portion, the lid having an upwardly open lid chamber with a lid lower wall having a lid lower wall aperture;
an outlet through which beverage contained in the beverage cavity is dispensed;
a bellows positioned at least partially within the lid chamber, the bellows having a bellows aperture, the bellows being downwardly collapsible;
an actuator downwardly movable to apply a downward force on the bellows to progressively downwardly collapse the bellows to increase the pressure of the trapped air in the bellows; and
a valve assembly including:
a skirt valve portion having a skirt wall with an upper end skirt wall portion and a flexible lower end skirt wall portion, the lower end skirt wall portion defining a skirt wall aperture, downward movement of the actuator moving the lower end skirt wall portion into fluid tight sealing engagement with the lid lower wall with the lower end skirt wall portion extending about the lid lower wall aperture; and
a duckbill valve portion positioned within the skirt valve portion and in fluid communication with the bellows aperture, the duckbill valve portion having a normally closed exit aperture which opens when the air pressure within the duckbill valve portion is above a duckbill valve opening pressure, when the pressure of the trapped air in the bellows is above the duckbill valve opening pressure and the lower end skirt wall portion is in fluid tight sealing engagement with the lid lower wall, the exit aperture opening completes a fluid passageway for the trapped air in the bellows to pass into the beverage cavity through the lid lower wall aperture.