US3833428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct heat rejection path radioisotopic thermoelectric generator
Assignee: Isotopes Inc
•
Filing: 1969-09-25
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Granted: 1974-09-03
•
Expires: 1989-09-25
Abstract
Abstract Compression springs on the hot side, bias the thermoelectric elements of the radioisotopic powered thermo-electric generator into contact with the casing wall. The bus straps, which electrically connect the cold ends of the thermoelectric elements are bonded directly to the inner wall of the casing by a pressure sensitive epoxy adhesive which is preferably a dielectric but a good thermal conductor thereby eliminating the need for cold-end hardware.
Inventors
- 👤 D Snyder
- 👤 J Himes
- 👤 M Pravda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
G; G21; G21H; G21H1/00; G21H1/10; G21H1/103
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
The assembly as claimed in claim 1 wherein the opposed end walls of said sector shaped block have recesses and said spring means comprises compression springs with their ends respectively positioned within opposed recesses.
Claim 2
Dependent Claim
42 words
The assembly as claimed in claim 1 wherein said thermoelectric elements have their cold ends joined by copper straps with the outer surfaces of said straps being bonded directly to said casing by a dielectric adhesive which is a good thermal conductor.
Claim 3
Dependent Claim
25 words
The assembly as claimed in claim 3 wherein said adhesive comprises one compound selected from the group consisting of epoxy, polymide, amide-imide and polybenzimidazole adhesives.
Claim 4
Dependent Claim
51 words
The thermoelectric generator assembly as claimed in claim 1 wherein said thermoelectric elements carry copper bus straps electrically connecting the same on the cold sides thereof with the outer surfaces of said copper bus straps bonded directly to said generator casing by a dielectric adhesive which is a good thermal conductor.
Claim 5
Dependent Claim
36 words
The thermoelectric generator assembly as claimed in claim 5 wherein said sector shaped blocks have a polygonal exterior configuration when assembled and said casing is formed of thin sheet metal stock bent into like cross-sectional configuration.
References Cited (Backward Citations)
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US3234048A
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US3231965A
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US3332807A
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US3226804A
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US3457121A
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |