Apparatus for transferring cryogenic liquid from one dewar to another
Patent 3946572 Issued on March 30, 1976. Estimated Expiration Date: 
March 30, 1993. 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.
March 30, 1993. 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 3109293 3191395 3211191 3456451 3633372 InventorAssigneeApplicationNo. 509677 filed on 09/26/1974US Classes:62/50.1, Liquified gas transferred as liquid141/82, Heating or cooling62/52.1Spraying of cryogenExaminersPrimary: Dority, Carroll B.Assistant: Capossela, Ronald C. Attorney, Agent or FirmAbstractThis invention relates to an apparatus for transferring a cryogenic fluid from one dewar to another and is characterized in that it provides a means for equalizing the temperatures in the liquid and vapor spaces of the supply dewar whereby the pressure in the dewar may be utilized for accurate control, either manual or automatic, of the amount of heat that must be added to the cryogenic liquid supplied to the receiving dewar for obtaining the desired receiving dewar pressure with minimum addition of heat to the supply dewar and no loss of cryogenic fluid through overboard vents during the transferring process. The apparatus has particular application as a ground servicing unit for filling liquid nitrogen dewars in aircraft. | |
