Spill resistant lid assembly for a drink container

1. A spill resistant lid assembly for closing the open top of a drink container, the lid assembly comprising:

a spout housing including an outlet port to deliver fluid to a user of the drink container, a first nipple extending from an interior side of the spout housing, and an inlet port to allow a replacement air flow into the drink container, the inlet port extending from an exterior side of the spout housing to a location on the interior side of the spout housing adjacent the first nipple;

a valve plate including a base, a second nipple extending from the base and positioned in the outlet port, and an opening in the base, the first nipple extending into the opening; and

a resilient valve seal sandwiched between the valve plate and the spout housing, the valve seal including an outlet diaphragm positioned in the outlet port, an outlet opening centered in the outlet diaphragm and closed by the second nipple with the outlet diaphragm in a first position, an inlet diaphragm on a side of the valve seal opposite the spout housing, and an inlet opening centered in the inlet diaphragm, the inlet opening closed by the first nipple with the inlet diaphragm in a first position, the outlet and inlet diaphragms being deformed from their first positions to disengage the inlet and outlet openings from the first and second nipples in response to a reduction of pressure in the outlet port.

2. The lid assembly of claim 1 wherein the outlet port includes a cylindrical opening, the valve seal includes a cylindrical wall extending into the cylindrical opening and supporting the outlet diaphragm, and the outlet nipple is located on a post extending from the base into the cylindrical opening, the post surrounded by the cylindrical wall.

3. The lid assembly of claim 2 wherein the valve plate includes an outwardly extending, annular lip surrounding the post, the lip engaging an interior side of the cylindrical wall of the valve seal to retain the valve seal to the valve plate.

4. The lid assembly of claim 3 including at least one flow opening located between the post and the annular lip.

5. The lid assembly of claim 3 wherein the annular lip is sized to force the cylindrical wall of the valve seal into a frictional engagement with the cylindrical opening to retain the valve plate and valve seal to the spout housing.

6. The lid assembly of claim 1 wherein the spout housing includes a cylindrical post extending into the opening of the valve plate and supporting the first nipple, the inlet port includes at least one opening formed in the cylindrical post, and the valve seal includes a cylindrical wall supporting the inlet diaphragm and surrounding the cylindrical post.

7. The lid assembly of claim 6 wherein the cylindrical wall includes an outwardly extending, annular lip engaged with the base to retain the valve seal to the valve plate.

8. The lid assembly of claim 7 wherein the cylindrical post and the cylindrical wall are frictionally engaged to retain the valve seal and the valve plate to the spout housing.

9. The lid assembly of claim 1 wherein the interior side of the spout housing is a planar surface that is interrupted only by the outlet port, the inlet port, the first nipple, and a cylindrical wall supporting the first nipple.

10. A spill resistant lid assembly for closing an open top of a drink container, the lid assembly comprising:

a spout housing including a planar surface, an outlet port extending between the planar surface and an exterior of the spout housing to deliver fluid to a user of the drink container, a first valve post extending from the planar surface, and an inlet port extending between the exterior and the first valve post to allow a replacement air flow into the drink container;

a valve plate including a first planar base, a second valve post extending from the base and positioned in the outlet port, and an opening in the base, the first valve post extending into the opening; and

a resilient valve seal including a second planar base sandwiched between the first planar base and the planar surface, a first resilient portion extending from the second planar base into the opening and engaged with the first valve post, and a second resilient portion extending from the second planar base into the outlet port and engaged with the second valve post.

11. The lid assembly of claim 10 wherein:

the first valve post includes a first nipple; and

the first resilient portion includes an inlet diaphragm, and an inlet opening centered in the inlet diaphragm, the inlet opening closed by the first nipple with the inlet diaphragm in a first state, the first diaphragm being deformed from the first position to disengage the inlet opening from the first nipple in response to a reduction of pressure in the outlet port.

12. The lid assembly of claim 10 wherein:

the second valve post includes a second nipple; and

the second resilient portion includes an outlet diaphragm positioned in the outlet port, and an outlet opening centered in the outlet diaphragm and closed by the second nipple with the outlet diaphragm in a first position, the second diaphragm being deformed from the first position to disengage the outlet opening from the second nipple in response to a reduction of pressure in the outlet port.

13. The lid assembly of claim 10 wherein the outlet port includes a cylindrical opening, and the second resilient portion includes a cylindrical wall extending into the cylindrical opening.

14. The lid assembly of claim 13 wherein the valve plate includes an outwardly extending, annular lip surrounding the second valve post, the lip engaging an interior side of the cylindrical wall of the valve seal to retain the valve seal to the valve plate.

15. The lid assembly of claim 14 including at least one flow opening located between the post and the annular lip.

16. The lid assembly of claim 14 wherein the annular lip is sized to force the cylindrical wall of the valve seal into a frictional engagement with the cylindrical opening to retain the valve plate and valve seal to the spout housing.

17. The lid assembly of claim 10 wherein the first resilient portion includes a cylindrical wall surrounding the first valve post.

18. The lid assembly of claim 17 wherein the cylindrical wall includes an outwardly extending, annular lip engaged with the first planar base to retain the valve seal to the valve plate.

19. The lid assembly of claim 18 wherein the first valve post and the cylindrical wall are frictionally engaged to retain the valve seal and the valve plate to the spout housing.

20. The lid assembly of claim 10 further comprising a lid cover sized to receive the spout housing and including a flange for retaining the lid assembly to the drink container.

21. A spill resistant lid assembly for closing the open top of a drink container and having an outlet port to deliver fluid to a user of the drink container, the lid assembly comprising:

an outer housing including a first nipple extending from an interior side of the outer housing, and an inlet port to allow a replacement air flow into the drink container, the inlet port extending from an exterior side of the outer housing to a location on the interior side of the outer housing adjacent the first nipple;

a valve plate including a base, a second nipple extending from the base and positioned in the outlet port, and an opening in the base, the first nipple extending into the opening;

a resilient outlet diaphragm positioned in the outlet port and having an outlet opening centered in the outlet diaphragm and closed by the second nipple with the outlet diaphragm in a first position; and

a resilient inlet diaphragm having an inlet opening centered in the inlet diaphragm, the inlet opening closed by the first nipple with the inlet diaphragm in a first position, the first and second diaphragms being deformable from their first positions to second positions with the inlet and outlet openings disengaged from the first and second nipples.

22. The lid assembly of claim 21 wherein the outer housing comprises the outlet port.

23. The lid assembly of claim 21 wherein the outlet diaphragm and the inlet diaphragm are part of a resilient valve seal sandwiched between the valve plate and the outer housing.

24. The lid assembly of claim 21 wherein the outlet port includes a cylindrical opening, the valve seal includes a cylindrical wall extending into the cylindrical opening and supporting the outlet diaphragm, and the outlet nipple is located on a post extending from the base into the cylindrical opening, the post surrounded by the cylindrical wall.

25. The lid assembly of claim 24 wherein the valve plate includes an outwardly extending, annular lip surrounding the post, the lip engaging an interior side of the cylindrical wall of the valve seal to retain the valve seal to the valve plate.

26. The lid assembly of claim 25 including at least one flow opening located between the post and the annular lip.

27. The lid assembly of claim 25 wherein the annular lip is sized to force the cylindrical wall of the valve seal into a frictional engagement with the cylindrical opening to retain the valve plate and valve seal to the spout housing.

28. The lid assembly of claim 21 wherein the spout housing includes a cylindrical post extending into the opening of the valve plate and supporting the first nipple, the inlet port includes at least one opening formed in the cylindrical post, and the valve seal includes a cylindrical wall supporting the inlet diaphragm and surrounding the cylindrical post.

29. The lid assembly of claim 28 wherein the cylindrical wall includes an outwardly extending, annular lip engaged with the base to retain the valve seal to the valve plate.

30. The lid assembly of claim 29 wherein the cylindrical post and the cylindrical wall are frictionally engaged to retain the valve seal and the valve plate to the spout housing.