US3833836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board package with cooling and vibration damping means
Assignee: Lockheed Martin Corp
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Filing: 1973-06-18
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Granted: 1974-09-03
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Expires: 1993-06-18
Abstract
Abstract Printed circuit board package for severe environmental conditions of temperature, humidity and altitude as well as for relatively high vibration applications. First and second printed circuit boards are arranged in the recesses of first and second metallic plates and a resilient means located between the two printed circuit boards presses each board against its corresponding recess surface. In one embodiment, the resilient means takes the form of a sheetlike assembly consisting of a plurality of parallel arranged strips of rubber tubing which are held together by means of a severe environmental tape, such as high temperature fluorocarbon tape.
Inventors
- 👤 A Moksu
- 👤 J Briley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/2039; H05K7/20436; H05K7/14; H05K7/1422; H05K7/1435
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A printed circuit board package comprising a sandwich like structure which includes first and second metallic plates each having on one surface a recess providing a recessed surface which is lined with a layer of electrically nonconductive material, said recessed surface being at least as large as any printed circuit board to be accommodated therein; first and second printed circuit boards arranged in the recesses of the first and second plates, and against the recessed surface, respectively; and resilient means located between the printed circuit boards and urging the boards against the corresponding recess surfaces.
Claim 2
Dependent Claim
95 words
A printed circuit board package comprising a sandwich like structure which includes first and second metallic plates each having on one surface a recess providing a recessed surface which is lined with a layer of electrically nonconductive material, said recessed surface being at least as large as any printed circuit board to be accommodated therein; first and second printed circuit boards arranged in the recesses of the first and second plates, and against the recessed surface, respectively; and resilient means located between the printed circuit boards and urging the boards against the corresponding recess surfaces.
Claim 3
Dependent Claim
19 words
A printed circuit board package as set forTh in claim 1 wherein said resilient means comprises a sheetlike assembly.
Claim 4
Dependent Claim
25 words
A printed circuit board package as set forth in claim 2 wherein said sheetlike assembly includes a plurality of parallel arranged strips of resilient tubes.
Claim 5
Dependent Claim
30 words
The invention as set forth in claim 3 wherein said printed circuit package is one of a plurality of such packages which are fastened together to form a stacked array.
Claim 6
Dependent Claim
30 words
The printed circuit board assembly as set forth in claim 4 wherein the outer support plates of said assembly include heat exchanger elements on the backsides of their respective recesses.
Claim 7
Dependent Claim
66 words
The printed board package as set forth in claim 1 wherein each of said printed circuit boards includes a number of components on one side thereof and a number of solder connections and runs on the other side thereof, said sides having said solder connections being disposed against the recessed surfaces in said metallic plates whereby said resilient means also substantially precludes movement of said components.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |