LNG delivery system

A vehicle mounted LNG storage and delivery system for delivering high pressure LNG to the vehicle's engine comprising:

• (a) main means (8) and overflow means (2) for storing LNG;
• (b) means for delivering LNG from the main and overflow means to the use device;
• (c) third means for saturating the LNG in the main means (8) at a pressure at or above that required by the engine before delivering LNG therefrom;
• and
• (d) fourth means for saturating the LNG in the overflow means (2) at a pressure at or above that required by the use device while LNG is being delivered from the main means.

A method for storing and delivering LNG to a vehicle engine comprising the steps of:

• (a) providing main and overflow tanks mounted on said vehicle;
• (b) filling the main tank to capacity with LNG;
• (c) displacing LNG from the main tank to the overflow tank with natural gas under high pressure until the level of LNG in the main tank reaches a predetermined level;
• (d) continuing to deliver high pressure natural gas to said overflow tank until the LNG therein is saturated at a pressure at or above that required by the vehicle engine;
• (e) delivering LNG from the overflow tank to the engine and delivering high pressure natural gas from the overflow tank to the main tank until the LNG in the main tank is saturated at a pressure at or above that required by the vehicle engine;
• and
• (f) delivering LNG from the main tank to the vehicle engine after the LNG in the overflow tank is depleted.