US4609040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-securing heat sink
Assignee: THEMALLOY INCORPORATED A TX CORP
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Filing: 1985-04-01
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Granted: 1986-09-02
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Expires: 2005-04-01
Abstract
Abstract A self-securing heat sink for transistors and the like comprises a unitary member that is constructed from a malleable material having a high heat transfer coefficient. The unitary member includes a base portion, at least one heat radiating fin portion, and a clip portion that is capable of engaging a transistor to retain the heat sink securely on the transistor without necessitating the use of threaded fasteners, rivets, or the like.
Inventors
- 👤 Marvin F. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:30
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A self-securing heat sink for transistors and the like, said heat sink comprising a unitary member constructed from malleable material having a high heat transfer coefficient, said unitary member including: (a) a base portion; (b) at least one heat radiating fin portion disposed at an angle to said base portion; and (c) a clip portion extending from and reverse bent over said base portion in spaced relationship to said base portion for receiving a transistor, said clip portion having a free end portion for engaging the transistor; having a medial portion angled toward said base portion; and having first and second spaced apart and generally parallel elongated embossments therein which extend along said clip portion from the intersection thereof with said base portion to a point proximate said free end portion to increase the rigidity and resilience of said clip portion whereby the transistor is engaged by said clip portion to hold the transistor tightly against said base portion.
Claim 2
Dependent Claim
159 words
A self-securing heat sink for transistors and the like, said heat sink comprising a unitary member constructed from malleable material having a high heat transfer coefficient, said unitary member including: (a) a base portion; (b) at least one heat radiating fin portion disposed at an angle to said base portion; and (c) a clip portion extending from and reverse bent over said base portion in spaced relationship to said base portion for receiving a transistor, said clip portion having a free end portion for engaging the transistor; having a medial portion angled toward said base portion; and having first and second spaced apart and generally parallel elongated embossments therein which extend along said clip portion from the intersection thereof with said base portion to a point proximate said free end portion to increase the rigidity and resilience of said clip portion whereby the transistor is engaged by said clip portion to hold the transistor tightly against said base portion.
Claim 3
Dependent Claim
38 words
The heat sink of claim 1 including a locking tab punched from said base portion and bent relatively away from said clip portion whereby said tab can be utilized to attach said heat sink to a circuit board.
Claim 4
Dependent Claim
33 words
The heat sink of claim 1 wherein said base portion has at least one embossment projecting toward said clip portion, said embossment being arranged to releaseably lock a transistor in said heat sink.
Claim 5
Dependent Claim
56 words
The heat sink of claim 3 wherein said base portion has at least one hole therethrough in alignment with said clip portion whereby a tool can be inserted through said hole into engagement with said clip portion to move said clip portion away from said base portion and ease the insertion and removal of a transistor.
Claim 6
Dependent Claim
29 words
The heat sink of claim 1 wherein said base portion has a plurality of spaced embossments projecting toward said clip portion for locating the transistor in said heat sink.
Claim 7
Dependent Claim
30 words
The heat sink of claim 5 wherein said base portion has a plurality of spaced positioning embossments projecting toward said clip portion to position the transistor in said heat sink.
Claim 8
Dependent Claim
68 words
The heat sink of claim 6 wherein said base has a pair of spaced holes therethrough outside the area defined by said positioning embossments in said base and in alignment with said clip portion whereby a tool can be inserted through said holes into engagement with said clip portion to move said clip portion away from said base portion and ease the insertion and removal of a transistor.
Claim 9
Dependent Claim
34 words
The heat sink of claim 7 including a tab extending from said base portion away from said clip portion whereby said tab can be utilized to attach said heat sink to a circuit board.
References Cited (Backward Citations)
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Cited
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Cited
US3670215A
Cited
US4054901A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |