Patent US4369838A successfully refreshed from Google Patents.
US4369838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for releasing heat
Assignee: Altemira Co Ltd
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Filing: 1980-05-27
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Granted: 1983-01-25
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Expires: 2000-05-27
Abstract
Abstract A heat releasing device comprising a base plate integrally formed with a multiplicity of tongue-like raised fins on at least one side thereof by skiving, each of the skived fins being divided at least at its forward end into a plurality of portions by slits.
Inventors
- 👤 Yoshihiko Asanuma
- 👤 Yoshihumi Shimajiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:34
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; B; B21; B21J; B21J5/00; B21J5/06; B21J5/068; F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/048; H10W40/20; H10W40/231; H10W40/235; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
A heat releasing device comprising a radiating base plate integrally formed with: a multiplicity of tongue-like raised fins spaced apart from each other by a distance of 4-10 mm and having a height of 15-50 mm, on at least one side of the base plate by skiving, each of the skived fins being divided at least at its forward end into a plurality of portions by at least one slit to form divided portions each having a width of 8-25 mm on each fin; and a mount for attaching heat emitting elements which is provided with a horizontal portion, extending at a right angle from the lower edge of the radiating base plate, heat emitting elements being intimately attached to said horizontal portion; wherein the radiating base plate is formed from an extruded blank and the skived fins are formed by cutting a fin forming portion having a plurality of projections provided with a lengthwise groove interposed therebetween, on at least one side of the blank.
Claim 2
Dependent Claim
166 words
A heat releasing device comprising a radiating base plate integrally formed with: a multiplicity of tongue-like raised fins spaced apart from each other by a distance of 4-10 mm and having a height of 15-50 mm, on at least one side of the base plate by skiving, each of the skived fins being divided at least at its forward end into a plurality of portions by at least one slit to form divided portions each having a width of 8-25 mm on each fin; and a mount for attaching heat emitting elements which is provided with a horizontal portion, extending at a right angle from the lower edge of the radiating base plate, heat emitting elements being intimately attached to said horizontal portion; wherein the radiating base plate is formed from an extruded blank and the skived fins are formed by cutting a fin forming portion having a plurality of projections provided with a lengthwise groove interposed therebetween, on at least one side of the blank.
Claim 3
Dependent Claim
30 words
A device as defined in claim 1 wherein each of the skived fins has at its forward end a flat face formed by removing a sharp edge from the end.
Claim 4
Dependent Claim
39 words
A device as defined in claim 2 wherein at least one of opposite side edges of the radiating base plate is provided with a projection or groove for guiding a device for cutting the forward ends of the fins.
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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |