Patent US4408833A successfully refreshed from Google Patents.
US4408833A
Expired / Lapsed
US
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Hot pressed and diffusion bonded laser mirror heat exchanger
Assignee: United States, UNITED STATES AIR FORCE THE, Secretary of
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Filing: 1982-01-13
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Granted: 1983-10-11
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Expires: 2002-01-13
Abstract
Abstract An improved heat exchanger for high energy laser mirrors is provided which comprises one or more sections each hot pressed into a desired configuration to define coolant passageways, and subsequently stacked and joined by a suitable means such as diffusion bonding. A surface of one of the sections may either support a laser mirror faceplate or be finished to provide the desired laser mirror surface.
Inventors
- 👤 John G. Gowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:24
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/181; G02B7/1815; F; F28; F28D; F28D9/00; F28D9/0031; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12083
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A fluid cooled laser mirror structure which comprises: a. a heat exchanger defining a plurality of internal passageways for conducting fluid coolant therethrough, said heat exchanger comprising a hot pressed member of powdered tungsten carbide and a binder, said hot pressed member having on a first surface thereof a plurality of channels configured in a predetermined pattern, and a backing plate covering said first surface to define said passageways configured in said pattern; b. inlet and outlet means communicating with said passageways for conducting said fluid coolant into and out of said heat exchanger; and c. a mirrored surface supported by said member adjacent a second surface of said pressed member.
Claim 2
Dependent Claim
111 words
A fluid cooled laser mirror structure which comprises: a. a heat exchanger defining a plurality of internal passageways for conducting fluid coolant therethrough, said heat exchanger comprising a hot pressed member of powdered tungsten carbide and a binder, said hot pressed member having on a first surface thereof a plurality of channels configured in a predetermined pattern, and a backing plate covering said first surface to define said passageways configured in said pattern; b. inlet and outlet means communicating with said passageways for conducting said fluid coolant into and out of said heat exchanger; and c. a mirrored surface supported by said member adjacent a second surface of said pressed member.
Claim 3
Dependent Claim
13 words
The laser mirror as recited in claim 1 wherein said binder comprises cobalt.
Claim 4
Dependent Claim
28 words
The laser mirror as recited in claim 2 wherein said member comprises hot pressed powder containing about 94 weight percent tungsten carbide powder and the remainder cobalt powder.
Claim 5
Dependent Claim
27 words
The laser mirror as recited in claim 3 wherein said member comprises said powder having a particle size range of from about one to about two microns.
Claim 6
Independent Claim
110 words
A method of fabricating a fluid cooled laser mirror, including a heat exchanger defining a plurality of internal fluid conducting passageways therethrough, which comprises: a. hot pressing in a mold powdered tungsten carbide, including a binder, to form a pressed member having on a first surface thereof a plurality of channels configured in a predetermined pattern, and having a substantially even second surface opposite said first surface; b. attaching a backing plate to said pressed member over said first surface thereof to provide an intermediate structure defining therethrough a plurality of passageways in said predetermined pattern; and c. applying a mirrored surface to said second surface of said pressed member.
Claim 7
Independent Claim
110 words
A method of fabricating a fluid cooled laser mirror, including a heat exchanger defining a plurality of internal fluid conducting passageways therethrough, which comprises: a. hot pressing in a mold powdered tungsten carbide, including a binder, to form a pressed member having on a first surface thereof a plurality of channels configured in a predetermined pattern, and having a substantially even second surface opposite said first surface; b. attaching a backing plate to said pressed member over said first surface thereof to provide an intermediate structure defining therethrough a plurality of passageways in said predetermined pattern; and c. applying a mirrored surface to said second surface of said pressed member.
Claim 8
Dependent Claim
15 words
The method as recited in claim 5 further comprising selecting powdered cobalt as said binder.
Claim 9
Dependent Claim
32 words
The method as recited in claim 6 wherein step a is characterized by hot pressing in said mold a powder containing about 94 weight percent tungsten carbide and the remainder cobalt powder.
Claim 10
Dependent Claim
29 words
The method as recited in claim 6 further comprising selecting tungsten carbide powder and cobalt powder having a particle size range of from about one to about two microns.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |