Patent US3780798A successfully refreshed from Google Patents.
US3780798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air directing heat sink mounting of electrical components
Assignee: AG Communication Systems Corp
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Filing: 1972-10-30
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Granted: 1973-12-25
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Expires: 1992-10-30
Abstract
Abstract Electronic component mounting heat sink members for printed wiring cards have heat dissipating fins oriented with respect to the free convection air flow such as to direct heated air out of the equipment in which the components are used.
Inventors
- 👤 W Reimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K7/20545
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
In combination with a printed wiring card having primary and secondary heat dissipating electrical components coupled thereto, an air directing heat sink means comprising a primary heat sink having a root area mounted to one end of said printed wiring card, adapted for mounting said primary heat dissipating electrical components in a conductive heat transfer relationship therewith, and having a plurality of heat exchanging fins oriented at an angle of inclination with respect to and extending from said end of said printed wiring card; and a secondary heat sink mounted on said printed wiring card at a laterally spaced apart position with respect to said primary heat sink, adapted for mounting said secondary heat dissipating electrical components in a conductive heat transfer relationship therewith, and having heat exchanging fins extending from the surface of said printed wiring card at an angle of inclination with respect to vertical whereby air heated by said secondary heat dissipating electrical components is directed by the heat exchanging fins of said secondary heat sink in a lateral direction toward said primary heat sink, and air heated by heat dissipated from said primary heat dissipating electrical components is directed by said primary heat sink outwardly from said printed wiring card.
Claim 2
Dependent Claim
204 words
In combination with a printed wiring card having primary and secondary heat dissipating electrical components coupled thereto, an air directing heat sink means comprising a primary heat sink having a root area mounted to one end of said printed wiring card, adapted for mounting said primary heat dissipating electrical components in a conductive heat transfer relationship therewith, and having a plurality of heat exchanging fins oriented at an angle of inclination with respect to and extending from said end of said printed wiring card; and a secondary heat sink mounted on said printed wiring card at a laterally spaced apart position with respect to said primary heat sink, adapted for mounting said secondary heat dissipating electrical components in a conductive heat transfer relationship therewith, and having heat exchanging fins extending from the surface of said printed wiring card at an angle of inclination with respect to vertical whereby air heated by said secondary heat dissipating electrical components is directed by the heat exchanging fins of said secondary heat sink in a lateral direction toward said primary heat sink, and air heated by heat dissipated from said primary heat dissipating electrical components is directed by said primary heat sink outwardly from said printed wiring card.
Claim 3
Dependent Claim
70 words
Apparatus as recited in claim 1 wherein the outer edges of the heat exchanging fins of said primary heat sink are substantially parallel with the end of said printed wiring card such that said fins are relatively wider at the lower end than at the upper end thereof and the effective length thereof is maximized with respect to the distance said heat exchange fins extend from said printed wiring card.
Claim 4
Dependent Claim
22 words
Apparatus as recited in claim 1 wherein said heated air rises over the surface of said printed wiring card by free convection.
Claim 5
Dependent Claim
82 words
Apparatus as recited in claim 1 including a plurality of vertically adjacent printed wiring cards each provided with a primary heat sink and a secondary heat sink and wherein the spatial relationship of said secondary heat sink with respect to said primary heat sink is such that said secondary heat sink disposed on a first printed wiring card directs air heated by said secondary heat dissipating electrical components toward the primary heat sink of the next higher vertically adjacent printed wiring card.
References Cited (Backward Citations)
US3730264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |