Liquid tank with combined liquid filling and liquid extraction conduit

1. A cryogenic fluid storage tank comprising:

a tank having a tank reservoir adapted to store a cryogenic fluid including a cryogenic liquid and a gas;

a first conduit penetrating said tank and having an outlet and an inlet formed therein, the outlet and the inlet disposed within said tank, wherein said first conduit conveys the cryogenic liquid to the outlet from the inlet only through a single passageway formed in an interior of said first conduit; and

a second conduit penetrating said tank and disposed within said tank adapted to selectively supply the gas to said tank and extract the gas from said tank,

wherein the outlet of said first conduit is an open terminal end of the single passageway formed in the interior of said first conduit and the inlet is disposed between the open terminal end and a portion of said tank where the first conduit penetrates said tank, and wherein the outlet of said first conduit is disposed substantially in a gaseous phase of said tank reservoir and the inlet of said first conduit is disposed substantially in a liquid phase of said tank reservoir,

wherein said first conduit has a substantial v-shape and the inlet is formed in the first conduit adjacent a nadir of the v-shape near a bottom of the tank reservoir.

2. The storage tank of claim 1 , further comprising a vacuum tube penetrating a sidewall of said tank, wherein a portion of said first conduit and a portion of said second conduit are disposed in said vacuum tube.

3. The storage tank of claim 1 , wherein said first conduit extends through a first penetration in a sidewall of said tank and said second conduit extends through a second penetration in the sidewall of said tank.

4. The storage tank of claim 1 , wherein the inlet of said first conduit has a diameter smaller than a diameter of the outlet of said first conduit.

5. The storage tank of claim 1 , wherein a first aperture of said second conduit disposed substantially in a gaseous phase of said tank reservoir is adapted to selectively supply a gas to said tank and extract the gas from said tank.

6. A cryogenic fluid storage tank comprising:

a tank having a tank reservoir adapted to store a cryogenic fluid including a cryogenic liquid and a gas;

a first conduit penetrating said tank and having an outlet and an inlet formed therein, the outlet and the inlet disposed within said tank, wherein said first conduit conveys the cryogenic liquid to the outlet from the inlet only through a single passageway formed in an interior of said first conduit, wherein the outlet of said first conduit is an open terminal end of the single passageway formed in the interior of said first conduit and the inlet is disposed between the open terminal end and a portion of said tank where the first conduit penetrates said tank, and wherein the outlet is disposed substantially in a gaseous phase of said tank reservoir and the inlet is disposed substantially in a liquid phase of said tank reservoir; and

a second conduit penetrating said tank and disposed within said tank adapted to selectively supply the gas to said tank and extract the gas from said tank, wherein a first aperture of said second conduit disposed substantially in a gaseous phase of said tank reservoir is adapted to selectively supply a gas to said tank and extract the gas from said tank,

wherein said first conduit has a substantial v-shape and the inlet is formed in the first conduit adjacent a nadir of the v-shape near a bottom of the tank reservoir.

7. The storage tank of claim 6 , further comprising a vacuum tube penetrating a sidewall of said tank, wherein a portion of said first conduit and a portion of said second conduit are disposed in the vacuum tube.

8. The storage tank of claim 6 , wherein said first conduit extends through a first penetration in a sidewall of said tank and said second conduit extends through a second penetration in the sidewall of said tank.

9. The storage tank of claim 6 , wherein the inlet of said first conduit has a diameter smaller than a diameter of the outlet of said first conduit.

10. A cryogenic fluid storage tank comprising:

a tank having a tank reservoir adapted to store a cryogenic fluid including a cryogenic liquid and a gas;

a first conduit penetrating said tank and having an outlet and an inlet formed therein, the outlet and the inlet disposed within said tank, wherein said first conduit conveys the cryogenic liquid to the outlet from the inlet only through a single passageway formed in an interior of said first conduit, wherein the outlet of said first conduit is an open terminal end of the single passageway formed in the interior of said first conduit and the inlet is disposed between the open terminal end and a portion of said tank where the first conduit penetrates said tank, and wherein the outlet is disposed substantially in a gaseous phase of said tank reservoir and the inlet is disposed substantially in a liquid phase of said tank reservoir; and

a second conduit penetrating said tank and disposed within said tank adapted to selectively supply the gas to said tank and extract the gas from said tank, wherein the first aperture of said second conduit is disposed substantially in a gaseous phase of said tank reservoir; and

a vacuum tube penetrating a sidewall of said tank, wherein a portion of said first conduit and a portion of said second conduit are disposed in the vacuum tube,

wherein said first conduit has a substantial v-shape and the inlet is formed in the first conduit adjacent a nadir of the v-shape near a bottom of the tank reservoir.

11. The storage tank of claim 10 , wherein the inlet of said first conduit has a diameter smaller than a diameter of the outlet of said first conduit.

12. The storage tank of claim 10 , wherein the cryogenic liquid is one of hydrogen, oxygen, nitrogen, and helium.