Self-contained liquid natural gas filling station

A self-contained delivery station for storing and dispensing cryogenic fluid to a use device, comprising:

• a) a bulk storage tank independent of the use device for receiving and storing cryogenic fluid;
• b) a sump tank independent of the use device for receiving cryogenic fluid from the bulk storage tank, the sump tank housing a pump submerged in the cryogenic fluid contained therein;
• c) an insulated conduit for conveying cryogenic fluid from the bulk storage tank to the sump tank;
• d) a pump outlet conduit for conveying cryogenic fluid from the pump to the use device;
• and
• e) means for selectively diverting cryogenic fluid from the pump back to the bulk storage tank to saturate the cryogenic fluid in the bulk storage tank, said means including heat exchange means for warming the cryogenic fluid diverted to said bulk storage tank.

A self-contained delivery station for storing and dispensing cryogenic fluid to a use device, comprising:

• a) a bulk storage tank independent of the use device for receiving and storing cryogenic fluid;
• b) a sump tank independent of the use device for receiving cryogenic fluid from the bulk storage tank, the sump tank housing a pump submerged in the cryogenic fluid contained therein;
• c) a first conduit for conveying cryogenic fluid from the bulk storage tank to the sump tank;
• d) a second conduit for conveying cryogenic fluid from the pump to a use device;
• and
• e) means for selectively transferring ambient heat to the bulk tank to saturate the fluid stored therein, said means comprising:
• (i) a third conduit for conveying cryogenic fluid from the pump to the bulk storage tank;
• and
• (ii) heat exchange means in circuit with said third conduit for warming of cryogenic fluid.