US4520426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling subrack for logic cards
Assignee: Wincor Nixdorf International GmbH
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Filing: 1983-08-25
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Granted: 1985-05-28
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Expires: 2003-08-25
Abstract
Abstract A subrack has a plurality of logic cards disposed in a planar arrangement. The logic cards are surrounded by a plug connector which has a cooling plate. In order to produce a good and uniform thermal contact to a further cooling plate, which is assigned in common to all logic cards, the logic cards are positioned in chambers of a grid frame to which the common cooling member is connected. Each cooling plate is individually pressed against the common cooling plate by way of a releasable connection, such as a screw.
Inventors
- 👤 Herrmann Wessely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:51
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20218; H05K7/20254
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
Subrack apparatus comprising: a motherboard including a plurality of first contacts arranged in groups of contact arrays; a plurality of grid elements connected to said motherboard and defining a grid including planar distributed chambers each containing a respective group of said first contacts; a plurality of logic modules each disposed in a respective chamber and each including second contacts engaging respective first contacts, logic circuits connected to said second contacts and a first cooling plate in each chamber in thermal contact with said logic circuits; and a common second cooling plate releasably mounted on said grid elements spaced from said motherboard a distance greater than the thickness of said logic modules and thermally connected to each of said first cooling plates.
Claim 2
Dependent Claim
121 words
Subrack apparatus comprising: a motherboard including a plurality of first contacts arranged in groups of contact arrays; a plurality of grid elements connected to said motherboard and defining a grid including planar distributed chambers each containing a respective group of said first contacts; a plurality of logic modules each disposed in a respective chamber and each including second contacts engaging respective first contacts, logic circuits connected to said second contacts and a first cooling plate in each chamber in thermal contact with said logic circuits; and a common second cooling plate releasably mounted on said grid elements spaced from said motherboard a distance greater than the thickness of said logic modules and thermally connected to each of said first cooling plates.
Claim 3
Dependent Claim
28 words
The subrack apparatus of claim 1, and further comprising: a plurality of releasable fasteners each engaging said second cooling plate and centrally engaging a respective first cooling plate.
Claim 4
Dependent Claim
14 words
The subrack apparatus of claim 2, wherein: each of said fasteners comprises a screw.
Claim 5
Dependent Claim
24 words
The subrack apparatus of claim 3, and further comprising: screws securing said second cooling plate to said grid at intersections of said grid elements.
Claim 6
Dependent Claim
30 words
The subrack apparatus of claim 1, wherein: said grid comprises at least one guide pin projecting therefrom; and said second cooling plate comprises a guide hole receiving said guide pin.
Claim 7
Dependent Claim
28 words
The subrack apparatus of claim 1, wherein: said grid comprises a pin extending therefrom; and a hook is mounted on said second cooling plate for engaging said pin.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |