Faucet including cartridge assembly with radially offset key

1. A faucet including a cartridge assembly, the faucet comprising:

a cartridge shell, the cartridge shell including a first end and a second end, the cartridge shell having an exterior surface, the cartridge shell having an interior with a central longitudinal axis extending through a center of the interior from the first end to the second end; and

a key extending from the exterior surface of the cartridge shell, the key having an inner side and an outer side, the inner side and the outer side of the key lying in a plane through the first end of the cartridge shell that is perpendicular to the central longitudinal axis of the cartridge shell, the key having a center line extending through a center of the inner side of the key and through a center of the outer side of the key;

wherein the center line of the key does not intersect the central longitudinal axis of the cartridge shell.

2. The faucet of claim 1 , wherein the key is integrally formed with the cartridge shell.

3. The faucet of claim 1 , wherein the key is generally parallelepiped shaped.

4. The faucet of claim 1 , wherein a length of the key is approximately one-eighteenth of a circumference of the exterior surface of the cartridge shell.

5. The faucet of claim 1 , wherein a depth of the key is approximately one-fourteenth of a diameter of the exterior surface of the cartridge shell.

6. The faucet of claim 1 , wherein a height of the key is approximately one-fifth of a height of the exterior surface of the cartridge shell.

7. The faucet of claim 1 , further comprising a valve body, the valve body including a first end and a second end, the valve body having an exterior surface and an interior surface, the valve body including a keyway for receiving the key.

8. The faucet of claim 7 , wherein the shape of the keyway generally corresponds to the shape of the key.

9. The faucet of claim 7 , wherein the keyway is a groove in the interior surface of the valve body.

10. The faucet of claim 7 , wherein the keyway is a notch through the interior surface and through the exterior surface of the valve body.

11. The faucet of claim 7 , wherein the interaction of the key with the keyway resists rotation of the cartridge shell within the valve body.

12. A faucet including a cartridge assembly, the faucet comprising:

a cartridge shell, the cartridge shell including a first end and a second end, the cartridge shell having an exterior surface, the cartridge shell having an interior with a central longitudinal axis extending through a center of the interior from the first end to the second end; and

a pair of keys extending from the exterior surface of the cartridge shell, each key having an inner side and an outer side, the inner side and the outer side of each key lying in a plane through the first end of the cartridge shell that is perpendicular to the central longitudinal axis of the cartridge shell, each key having a center line extending through a center of the inner side of the key and through a center of the outer side of the key;

wherein the center line of each key does not intersect the central longitudinal axis of the cartridge shell.

13. The faucet of claim 12 , wherein the keys are diametrically opposed to each other and the center line of one of the pair of keys is common with the center line of another of the pair of keys.

14. The faucet of claim 12 , wherein the keys are diametrically offset from each other and the center line of one of the pair of keys is parallel to the center line of another of the pair of keys.

15. The faucet of claim 12 , further comprising a valve body, the valve body including a first end and a second end, the valve body having an exterior surface and an interior surface, the valve body including a pair of keyways for receiving the pair of keys.

16. The faucet of claim 15 , wherein the shape of the keyways generally corresponds to the shape of the keys.

17. A faucet including a cartridge assembly, the faucet comprising:

a cartridge shell, the cartridge shell including a first end and a second end, the cartridge shell having an exterior surface, the cartridge shell having an interior with a central longitudinal axis extending through a center of the interior from the first end to the second end;

a first pair of keys extending from the exterior surface of the cartridge shell, the first pair of keys being diametrically opposed to each other, each of the first pair of keys having an inner side and an outer side, the inner side and the outer side of each of the first pair of keys lying in a plane through the first end of the cartridge shell that is perpendicular to the central longitudinal axis of the cartridge shell, each of the first pair of keys having a center line extending through a center of the inner side of the key and through a center of the outer side of the key, the center line of one of the first pair of keys is common with the center line of another of the first pair of keys; and

a second pair of keys extending from the exterior surface of the cartridge shell, the second pair of keys being diametrically opposed to each other, each of the second pair of keys having an inner side and an outer side, the inner side and the outer side of each of the second pair of keys lying in a plane through the first end of the cartridge shell that is perpendicular to the central longitudinal axis of the cartridge shell, each of the second pair of keys having a center line extending through a center of the inner side of the key and through a center of the outer side of the key, the center line of one of the second pair of keys is common with the center line of another of the second pair of keys;

wherein the first pair of keys are diametrically opposed to the second pair of keys;

wherein the center line of the first pair of keys is parallel to the center line of the second pair of keys;

wherein the center line of the first pair of keys does not intersect the central longitudinal axis of the cartridge shell; and

wherein the center line of the second pair of keys does not intersect the central longitudinal axis of the cartridge shell.

18. The faucet of claim 17 , further comprising a valve body, the valve body including a first end and a second end, the valve body having an exterior surface and an interior surface, the valve body including a first pair of keyways for receiving the first pair of keys and a second pair of keyways for receiving the second pair of keys.

19. The faucet of claim 18 , wherein the shape of the keyways generally corresponds to the shape of the keys.

20. The faucet of claim 18 , wherein the cartridge shell is formed of plastic and wherein the keys can generally withstand at least one-hundred twenty inch pounds of force.