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

Claim 42:
43. 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 and 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 first bellows aperture and a second bellows aperture, the bellows being downwardly collapsible;
a bellows valve closing the first bellows aperture when the bellows is being downwardly collapsed to trap air in the bellows;
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 having an upper duckbill valve portion and a lower duckbill valve portion, the upper duckbill valve portion being in fluid communication with the second bellows aperture, the upper end skirt wall portion being in fluid tight sealing engagement with the upper duckbill valve portion and the lower end skirt wall portion extending about the lower duckbill valve portion, the lower duckbill valve portion having a normally closed exit aperture opened when the air pressure within the lower duckbill valve portion is above a duckbill valve opening pressure, downward movement of the actuator after the lower end skirt wall portion is in fluid tight sealing engagement with the lid lower wall further collapses the bellows and further increases the pressure of the trapped air in the bellows, when the pressure of the trapped air in the bellows is above the duckbill valve opening pressure, the exit aperture opens and completes a fluid passageway for the trapped air in the bellows to pass into the beverage cavity through the lid lower wall aperture.