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US 5,400,602 AGranted
Cryogenic transport hose
AssigneeCryomedical Sciences, Inc.
InventorsZhaoHua Chang, John Baust, Larry Pottorff
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Abstract
A hose designed to facilitate supply and return of cryogenic fluid such as a liquefied gas includes supply and return conduits wrapped in multiple layers of reflective metallized material, which is surrounded by a layer of foam material which is, in turn, surrounded by a protective outer layer such as, for example, a woven cover. The conduits are made of a material such as polytetrafluoroethylene. The inventive hose is lightweight and maintains flexibility for extended periods of time with cryogenic fluid flowing through the conduits.
Claims11
A cryogenic fluid transport hose, comprising:
- a) a supply conduit and a return conduit, said conduits being made of a material which remains flexible and pliable at temperatures below -100.degree. C.;
- b) said conduits being wrapped within a plurality of layers of reflective wrapping defining a first vapor barrier;
- c) said wrapping being surrounded by a lightweight foamed polymer insulative layer defining a second vapor barrier;
- d) a flexible cover covering said lightweight foamed polymer insulative layer;
- e) said hose having a proximal end and a distal end, said proximal end carrying a coupling adapted to be coupled to a source of cryogenic fluid for supplying cryogenic fluid to said supply conduit and for receiving cryogenic fluid from said return conduit, said distal end being adapted to be coupled to a cryosurgical probe.
2 more elements
Dependencies are inferred from the claim text.