US4586561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature heat pipe employing a hydrogen getter
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1984-02-27
•
Granted: 1986-05-06
•
Expires: 2004-02-27
Abstract
Abstract A heat pipe is described for use under low temperature conditions employing preferably ammonia as the heat transport medium and a hydrogen getter material, preferably being a zirconium intermetallic alloy, capable of non-reversibly gettering hydrogen gas in the presence of ammonia and air.
Inventors
- 👤 Robert J. Franco
- 👤 Barry J. Berkowitz
- 👤 Bal K. Kaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:37
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/024; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0258; F28F; F28F2200/00; F28F2200/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
50 words
A heat pipe comprising a low temperature heat transport medium selected from the group consisting of ammonia and low molecular weight halogenated hydrocarbons and an intermetallic alloy hydrogen getter material selected from the group consisting of ZrMn 2 , ZrMn x where x=1.8-3.8, ZrNi, ZrAl, ZrYFe, ZrTiNi and mixtures thereof.
Claim 2
Dependent Claim
50 words
A heat pipe comprising a low temperature heat transport medium selected from the group consisting of ammonia and low molecular weight halogenated hydrocarbons and an intermetallic alloy hydrogen getter material selected from the group consisting of ZrMn 2 , ZrMn x where x=1.8-3.8, ZrNi, ZrAl, ZrYFe, ZrTiNi and mixtures thereof.
Claim 3
Dependent Claim
22 words
The heat pipe of claim 1 wherein said heat transport medium has a boiling point substantially below 0° C. at atmospheric pressure.
Claim 4
Dependent Claim
109 words
The heat pipe of claim 1 employing ammonia as the heat transport medium, in which hydrogen contaminant gas can be present, comprising: (a) an evaporator means, for evaporating the ammonia; (b) a condenser means, for condensing the evaporated ammonia and communicating with said evaporator means (a) to allow recycle of the condensed ammonia back to said evaporator means; (c) a hydrogen getter assembly comprised of a retaining element and said hydrogen getter material, said assembly communicating with said condenser means to allow contact between said hydrogen getter material and the hydrogen gas, if present, said getter material capable of gettering hydrogen gas in the presence of ammonia and air.
Claim 5
Dependent Claim
26 words
The heat pipe of claim 3 wherein said hydrogen getter assembly is positioned on the top of said heat pipe communicating with said condenser means (b).
Claim 6
Dependent Claim
26 words
The heat pipe of claim 3 wherein said hydrogen getter assembly is positioned on the side of said heat pipe communicating with said condenser means (b).
Claim 7
Dependent Claim
24 words
The heat pipe of claim 3 wherein said hydrogen getter assembly is positioned directly between said evaporator means (a) and said condenser means (b).
Claim 8
Dependent Claim
31 words
The heat pipe of claim 3 wherein said hydrogen getter material is capable of non-reversibly gettering hydrogen below 100° F. in the presence of ammonia, air and small amounts of water.
Claim 9
Dependent Claim
17 words
The heat pipe of claim 3 wherein said zirconium alloy is selected from ZrMn 2 and ZrNi.
Claim 10
Dependent Claim
28 words
A heat pipe comprising liquid ammonia as the heat transport medium and ZrMn 2 as the hydrogen getter material for gettering contaminant hydrogen gas which may be present.
Claim 11
Dependent Claim
28 words
A heat pipe comprising liquid ammonia as the heat transport medium and ZrMn 2 as the hydrogen getter material for gettering contaminant hydrogen gas which may be present.
Claim 12
Dependent Claim
58 words
A process for removing contaminant H 2 gas from a heat pipe employing ammonia as the heat transport medium comprising contacting said hydrogen gas in the presence of ammonia and air with an intermetallic alloy hydrogen getter material selected from the group consisting of ZrMn 2 , ZrMn x where x=1.8-3.8, ZrNi, ZrAl, ZrYFe, ZrTiNi and mixtures thereof.
Claim 13
Dependent Claim
58 words
A process for removing contaminant H 2 gas from a heat pipe employing ammonia as the heat transport medium comprising contacting said hydrogen gas in the presence of ammonia and air with an intermetallic alloy hydrogen getter material selected from the group consisting of ZrMn 2 , ZrMn x where x=1.8-3.8, ZrNi, ZrAl, ZrYFe, ZrTiNi and mixtures thereof.
Claim 14
Dependent Claim
16 words
The process of claim 10 wherein said zirconium alloy is selected from ZrMn 2 and ZrNi.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |