Apparatus for beverage formation with automated water delivery to heating tank

1. A beverage formation device, comprising:

a brew chamber for receiving a beverage cartridge and having a lid that is movable between open and closed positions to open and close the brew chamber, the brew chamber adapted to substantially enclose a beverage cartridge with the lid in a closed position;

a reservoir for holding a beverage precursor liquid, the reservoir being accessible and arranged to receive and hold beverage precursor liquid with the brew chamber lid in a closed position;

a heater tank for heating precursor liquid that is provided to the brew chamber; and

a valve that automatically opens a flow path between the reservoir and the heating tank to allow flow of beverage precursor liquid from the reservoir to the heating tank when the brew chamber lid is open, and that automatically closes a flow path between the reservoir and the heating tank when the brew chamber lid is closed.

2. The device of claim 1 , wherein the valve includes a gate that is attached to the brew chamber lid and moves as the brew chamber lid moves.

3. The device of claim 1 , wherein precursor liquid flows from the reservoir to the heater tank under the force of gravity.

4. The device of claim 1 , further comprising an air pump that pressurizes air in the heater tank to cause the precursor liquid to flow from the heater tank to the brew chamber.

5. The device of claim 1 , wherein the valve pneumatically seals the heater tank when the valve is in a closed position.

6. The device of claim 1 , wherein the heater tank is controlled so that heating of precursor liquid in the heater tank cannot begin until the valve is closed.

7. The device of claim 1 , wherein valve includes a delay feature to close the flow path after the brew chamber is closed.

8. The device of claim 1 , wherein the reservoir includes a reservoir lid that is movably mounted to move between open and closed positions.

9. The device of claim 8 , wherein with the reservoir lid positioned in the open position, beverage precursor liquid is pourable by a user into the reservoir.

10. The device of claim 8 , wherein the reservoir lid is movable independently of the brew chamber lid and the valve.

11. The device of claim 1 , wherein the reservoir includes a volume indicator that provides a visible indication for two or more different volumes of precursor liquid held in the reservoir.

12. The device of claim 1 , wherein the reservoir is positioned above the heater tank, and the valve is positioned between the reservoir and the heater tank.

13. The device of claim 11 , wherein the reservoir includes a reservoir lid that is movably mounted to move between open and closed positions, and with the reservoir lid in the open position, the volume indicator is visible to user.

14. The device of claim 1 , wherein the reservoir is arranged to hold a volume of up to 10 ounces of beverage precursor liquid with the brew chamber lid in the closed position.

15. The device of claim 1 , wherein the heater tank includes a heater, the device further comprising a controller arranged to control operation of the heater.

16. The device of claim 1 , wherein the heater tank includes an outlet at a bottom of the heater tank that is fluidly coupled to the brew chamber by a line.

17. The device of claim 1 , wherein the reservoir and heater tank are arranged to be emptied of beverage precursor liquid after completion of a brew cycle.

18. The device of claim 1 , further comprising a vent that vents the heater tank with the flow path closed by the valve.

19. The device of claim 18 , wherein the vent includes an orifice.

20. The device of claim 19 , further comprising an air pump that pressurizes air in the heater tank to cause the precursor liquid to flow from the heater tank to the brew chamber with the vent open.