Patent ID: 7047947

Claim:
An LPG fuel system for use on a vehicle using LPG to fuel an internal combustion engine, the fuel system comprising: a storage tank and a transfer tank, each tank configured to contain liquid and gaseous LPG; a fuel supply pump within the transfer tank configured to push fuel from the transfer tank through a first fitting in the transfer tank to the engine; a second fitting with a biased three way connection, with a first end of the three way fitting connected to an engine fuel return line, a second end connected to the storage tank, and a third end connected to the transfer tank, the three way connection biased to permit flow of excess fuel from the engine to the storage tank until the storage tank reaches a first specified volume of liquid LPG, and then to permit flow of excess fuel from the engine into the transfer tank; the transfer tank including a transfer pump for pulling fuel from the storage tank into the transfer tank through a third fitting on the transfer tank, the transfer pump configured to shut off when a second specified volume of liquid LPG is in the transfer tank.