US5400602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic transport hose
Assignee: Endocare Inc
•
Filing: 1993-07-08
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Granted: 1995-03-28
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Expires: 2013-07-08
Abstract
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.
Inventors
- 👤 ZhaoHua Chang
- 👤 John Baust
- 👤 Larry Pottorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:21
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/121; A; A61; A61B; A61B18/00; A61B18/02; F16L11/22; F16L59/00; F16L59/14; F16L59/141; F16L2011/047; Y; Y10; Y10S; Y10S128/00; Y10S128/27
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
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° 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.
Claim 2
Dependent Claim
133 words
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° 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.
Claim 3
Dependent Claim
12 words
The hose of claim 1, wherein said conduits are made of polytetrafluoroethylene.
Claim 4
Dependent Claim
20 words
The hose of claim 1, wherein said plurality of layers comprises from 2 to 30 layers of said reflective wrapping.
Claim 5
Dependent Claim
14 words
The hose of claim 3, wherein said reflective wrapping comprises aluminized polyethylene terephthalate foil.
Claim 6
Dependent Claim
13 words
The hose of claim 4, wherein said aluminized polyethylene terephthalate foil is wrinkled.
Claim 7
Dependent Claim
17 words
The hose of claim 1, wherein said lightweight foamed polymer insulative layer comprises closed cell polyolefin foam.
Claim 8
Dependent Claim
33 words
The hose of claim 1, wherein said lightweight foamed polymer insulative layer has a longitudinal split permitting assembly over said wrapping, said split having opposed faces bonded together, in assembly, over said wrapping.
Claim 9
Dependent Claim
16 words
The hose of claim 1, wherein said flexible cover is made of an expandable braided material.
Claim 10
Dependent Claim
20 words
The hose of claim 1, wherein said distal end includes a distal coupling adapted to couple to a cryosurgical probe.
Claim 11
Dependent Claim
16 words
The hose of claim 9, wherein said distal coupling includes a chamber containing temperatures sensing means.
Claim 12
Dependent Claim
31 words
The hose of claim 10, wherein said temperature sensing means comprises a thermocouple and an electrical conductor connected to said thermocouple and extending through said hose to said proximal end thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |