Patent US4646131A successfully refreshed from Google Patents.
US4646131A
Expired / Lapsed
US
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Rectifier device
Assignee: Mitsubishi Electric Corp
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Filing: 1983-11-18
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Granted: 1987-02-24
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Expires: 2003-11-18
Abstract
Abstract A rectifier device which includes a first radiating fin, a flat type semiconductor element which is disposed in contact with one surface of said first radiating fin, a substantially cylindrical insulating envelope which envelopes the flat type semiconductor element and one side of which is coupled with said first radiating fin, a second radiating fin which is coupled with the other side of the insulating envelope, and a through conductor which is threadably inserted through a central part of said second radiating fin and which lies in contact with said flat type semiconductor element.
Inventors
- 👤 Nobutada Amagasa
- 👤 Ryoji Takatani
- 👤 Hiroshi Inoo
- 👤 Kazuichi Suzuki
- 👤 Mitsuo Kiriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:21
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/13; H10W76/136; H10W40/00; H10W40/20; H10W40/22; H10W76/138
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A rectifier device comprising a first radiating fin, a flat type semiconductor element which is disposed in contact with one surface of said first radiating fin, a substantially cylindrical insulating envelope which surrounds said flat type semiconductor element and one side of which is coupled with said first radiating fin, a second radiating fin which is coupled with another side of said insulating envelope opposite said one side, and a through conductor which threadably extends through a central part of said second radiating fin and which lies in contact with said flat type semiconductor element, such that said flat type semiconductor element is completely enclosed by said first and second radiating fins, said through conductor and said insulating envelope.
Claim 2
Dependent Claim
119 words
A rectifier device comprising a first radiating fin, a flat type semiconductor element which is disposed in contact with one surface of said first radiating fin, a substantially cylindrical insulating envelope which surrounds said flat type semiconductor element and one side of which is coupled with said first radiating fin, a second radiating fin which is coupled with another side of said insulating envelope opposite said one side, and a through conductor which threadably extends through a central part of said second radiating fin and which lies in contact with said flat type semiconductor element, such that said flat type semiconductor element is completely enclosed by said first and second radiating fins, said through conductor and said insulating envelope.
Claim 3
Dependent Claim
25 words
A rectifier device according to claim 1, wherein said insulating envelope comprises a metal body, a surface of which has a ceramic layer flame sprayed.
Claim 4
Dependent Claim
30 words
A rectifier device according to claim 1, wherein said insulating envelope is made of a ceramic material, said insulating envelope being metal bonded to said first and second radiating fins.
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |