US4782890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pipe
Assignee: Resonac Holdings Corp
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Filing: 1987-04-20
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Granted: 1988-11-08
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Expires: 2007-04-20
Abstract
Abstract A heat pipe comprising a container having water enclosed therein as a working fluid and made of a material reactive with water to evolve hydrogen gas. The heat pipe is characterized in that the container has placed therein a solid oxidizing agent for oxidizing the hydrogen gas to water. The hydrogen gas produced by the reaction of the working fluid, i.e. water, with the container is oxidized to water by the oxidizing agent without remaining in the form of a gas within the condensing portion of the pipe.
Inventors
- 👤 Saburo Shimodaira
- 👤 Isamu Uchida
- 👤 Minoru Hasegawa
- 👤 Koichiro Fukui
- 👤 Yuichi Furukawa
- 👤 Kazunari Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0258; Y; Y10; Y10S; Y10S165/00; Y10S165/917
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
A heat pipe comprising a container having water enclosed therein as a working fluid and made of a material reactive with water to evolve hydrogen gas, the heat pipe being characterized in that the container has placed therein a solid oxidizing agent for oxidizing the hydrogen gas to water.
Claim 2
Dependent Claim
49 words
A heat pipe comprising a container having water enclosed therein as a working fluid and made of a material reactive with water to evolve hydrogen gas, the heat pipe being characterized in that the container has placed therein a solid oxidizing agent for oxidizing the hydrogen gas to water.
Claim 3
Dependent Claim
26 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is disposed within the container at the portion thereof serving as its condensing portion.
Claim 4
Dependent Claim
16 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is a copper oxide.
Claim 5
Dependent Claim
14 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is granular.
Claim 6
Dependent Claim
14 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is powdery.
Claim 7
Dependent Claim
17 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is a granular copper oxide.
Claim 8
Dependent Claim
17 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is a powdery copper oxide.
Claim 9
Dependent Claim
63 words
A heat pipe as defined in claim 1 wherein a net is provided within the container and positioned at a specified distance from one end thereof for partitioning the interior of the container, and the oxidizing agent is provided between the net and said one end of the container and is in the form of granules larger than the meshes of the net.
Claim 10
Dependent Claim
63 words
A heat pipe as defined in claim 1 wherein a net is disposed within the container and positioned at a specified distance from one end thereof for partitioning the interior of the container, and the oxidizing agent is provided between the net and said one end of the container and is in the form of particles larger than the meshes of the net.
Claim 11
Dependent Claim
98 words
A heat pipe as defined in claim 1 wherein the container comprises a container main body in the form of a pipe and an end cap closing each of opposite open ends of the main body, and a tube for accommodating the oxidizing agent has one open end secured to and closed by the inner surface of the end cap at one end,. the other open end of the accommodating tube being closed with a net, the oxidizing agent being accommodated in the tube and being in the form of granules larger than the meshes of the net.
Claim 12
Dependent Claim
98 words
A heat pipe as defined in claim 1 wherein the container comprises a container main body in the form of a pipe and an end cap closing each of opposite open ends of the main body, and a tube for accommodating the oxidizing agent has one open end secured to and closed by the inner surface of the end cap at one end, the other open end of the accommodating tube being closed with a net, the oxidizing agent being accommodated in the tube and being in the form of particles larger than the meshes of the net.
Claim 13
Dependent Claim
29 words
A heat pipe as defined in claim 1 wherein the oxidizing agent is powdery and sintered into a porous block, and the porous block is placed in the container.
Claim 14
Dependent Claim
16 words
A heat pipe as defined in claim 12 wherein the oxidizing agent is a copper oxide.
Claim 15
Dependent Claim
70 words
A heat pipe as defined in claim 12 wherein the container comprises a container main body in the form of a pipe and an end cap closing each of opposite open ends of the main body, and a bar has one end secured to the inner surface of the end cap at one end of the main body, the porous block being fixed to the other end of the bar.
Claim 16
Dependent Claim
30 words
A heat pipe as defined in claim 12 wherein the porous block is in the form of a hollow cylinder and is secured to the peripheral wall of the container.
Claim 17
Dependent Claim
60 words
A heat pipe as defined in claim 12 wherein the porous block of oxidizing agent is disposed in an interior portion of the container close to its one end, and restraining means is provided within the container at a specified distance from said one end thereof for restraining the porous block from moving toward the other end of the container.
Claim 18
Dependent Claim
25 words
A heat pipe as defined in claim 16 wherein the restraining means is at least one bar secured to the peripheral wall of the container.
Claim 19
Dependent Claim
42 words
A heat pipe as defined in claim 16 wherein the restraining means is a stepped portion formed on the peripheral wall of the container and projecting inward from the inner peripheral surface of the container portion having the porous block accommodated therein.
Claim 20
Dependent Claim
83 words
A heat pipe as defined in claim 16 wherein the container comprises a container main body in the form of a pipe and an end cap closing each of opposite open ends of the main body, and the restraining means is a stopper attached to one end of a bar, the bar extending through the porous block and secured at the other end thereof to the end cap at one end of the main body, the porous body being engageable with the stopper.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |