Method and apparatus for the automatic refilling of a liquid hydrogen tank in a motor vehicle
Patent 4608830 Issued on September 2, 1986. Estimated Expiration Date: 
November 29, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 29, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3646924 3783849 Cryogenic fuel tank Alternative liquid fuel injection system and method Liquid fuel system method and apparatus Fuel injection system Patent #: 4520763 InventorsAssigneeApplicationNo. 06/676001 filed on 11/29/1984US Classes:62/7, UTILIZING FUEL AS REFRIGERANT123/541, Fuel only62/46.2, Mixing of substance with hydrogen62/50.1Liquified gas transferred as liquidExaminersPrimary: Capossela, Ronald C.Attorney, Agent or FirmInternational ClassesF17C 5/00 (20060101)F17C 5/04 (20060101) B60S 5/02 (20060101) B60S 5/00 (20060101) Foreign Application Priority Data1983-12-10 DEAbstractIn order to achieve efficient refueling with a method and an apparatus for the automatic refilling of a liquid hydrogen tank in a motor vehicle in which the tank is connected to a liquid hydrogen supply line as well as a hydrogen gas return line, it is proposed that prior to commencement of refilling the liquid hydrogen tank the liquid hydrogen supply line in the vehicle be connected to the hydrogen gas return line and that liquid hydrogen be passed through said lines in order to cool them whereby only after they have been cooled is the liquid hydrogen supply line connected to the liquid hydrogen tank. For this purpose, a bypass line connecting the liquid hydrogen supply line to the hydrogen gas return line is provided in the motor vehicle, and electrically operable closing valves are provided in the liquid hydrogen supply line downstream of where the bypass line branches as well as in the bypass line.Other References
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