Patent US3631297A successfully refreshed from Google Patents.
US3631297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antivibration mounting for circuit boards
Assignee: Dynalectron Corp
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Filing: 1969-02-12
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Granted: 1971-12-28
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Expires: 1989-02-12
Abstract
Abstract A mounting for a large printed circuit board having a widespread number of short projections extending out from a surface to be supported. A slice of easily impressionable rigid foam plastic is sandwiched between the printed circuit board and a base of rigid metal. The projections are impressed into the plastic foam to provide retaining cavities, and a series of screws extend through said board at a margin closely adjacent its edge, extending through the foam and into the base.
Inventors
- 👤 Arthur P Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:41
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0271; H05K5/00; H05K5/06; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0133; H05K2201/10; H05K2201/10431; H05K2201/10598; H05K2201/20; H05K2201/2045; H05K3/00; H05K3/0058
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
The mounting of claim 1 wherein said securing means comprises a series of screws extending through said board at a margin closely adjacent its edge and extending through said foam and into said base.
Claim 2
Dependent Claim
17 words
The mounting of claim 1 wherein said rigid foam plastic is a sheet of rigid polystyrene foam.
Claim 3
Dependent Claim
17 words
The mounting of claim 1 wherein said rigid foam plastic is a sheet of rigid polyurethane foam.
Claim 4
Dependent Claim
199 words
A compact sandwich assembly for a large printed circuit board having circuit components mounted on one surface thereof and having attachment means extending through the board and affixed thereto by solder blobs that provide a widespread number of projections on the other surface, which is the surface to be supported, said printed circuit board having a series of screw openings located close to its edges, a base of rigid metal substantially the shape of the circuit board and having screw-receiving openings matching those on the printed circuit board, a slice of rigid foam plastic which is easily impressionable, of a greater thickness than the free space between the projections and the base located in between said board and said base, with said projections impressed firmly into the plastic foam and insulated by the plastic foam from said base while confined in cavities formed to substantially the size and shape of the projections in the plastic foam, and screws extending through the screw openings and screw receiving openings to hold the assembly firmly together at the edges of the printed circuit board while the slice of foam retains the portions against lateral movement by cooperation of the projections and cavities.
Claim 5
Dependent Claim
19 words
The mounting assembly of claim 5 wherein said slice is approximately one eighth inch thick sheet of rigid polystyrene.
Claim 6
Dependent Claim
19 words
The mounting assembly of claim 5 wherein said slice is an approximately one-eighth inch thick sheet of rigid polyurethane.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |