US4081776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer with heat conducting laminate
Assignee: Panasonic Holdings Corp
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Filing: 1976-06-02
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Granted: 1978-03-28
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Expires: 1996-06-02
Abstract
Abstract A transformer is disclosed in which an insulating material having a thermal conductivity higher than 10-3 cal/cm.sec. DEG C is interposed between a coil and a core so that transfer of heat generated in the coil to the core may be attained at a higher rate and consequently efficient heat dissipation may be effected. The diameters of conductors used may be reduced so that a transformer compact in size and light in weight may be provided.
Inventors
- 👤 Hironori Hisamoto
- 👤 Katsushi Muraki
- 👤 Motoji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:32
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A transformer comprising a coil on a core and a lamination consisting of a sintered ceramic body which is made of alumina or mullite having a thermal conductivity higher than 10 -3 cal/cm.sec.° C and an adhesive or resilient layer made of silicone rubber having a thermal conductivity higher than 10 -3 , cal/cm.sec.° C interposed between said coil and said core.
Claim 2
Dependent Claim
62 words
A transformer comprising a coil on a core and a lamination consisting of a sintered ceramic body which is made of alumina or mullite having a thermal conductivity higher than 10 -3 cal/cm.sec.° C and an adhesive or resilient layer made of silicone rubber having a thermal conductivity higher than 10 -3 , cal/cm.sec.° C interposed between said coil and said core.
Claim 3
Dependent Claim
22 words
A transformer as set forth in claim 1 wherein the surfaces of said sintered ceramic body are finished with a rough surface.
Claim 4
Dependent Claim
20 words
A transformer as set forth in claim 1 wherein said ceramic body extends outwardly from said core in both directions.
References Cited (Backward Citations)
US2361249A
Cited
US2992405A
Cited
US3170130A
Cited
US3428928A
Cited
US3945854A
Cited
US4009459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |