Patent US4833334A successfully refreshed from Google Patents.
US4833334A
Expired / Lapsed
US
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Protective box for electronic circuits hardened with respect to X-rays
Assignee: Airbus Group SAS
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Filing: 1987-04-08
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Granted: 1989-05-23
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Expires: 2007-04-08
Abstract
Abstract Protective box for electronic circuits hardened with respect to X-rays. The protective box comprises a base and a cover fixed to the base, formed from a rigid mechanical structure constituted by a composite material formed by a fibre-reinforced resin, an X-ray protection material partly covering the outer surface of the mechanical structure, said X-ray protection material being formed by a resin matrix containing a powder of a metal with an atomic number at least equal to 47 and with a melting point at least equal to 630° C., a material formed from an element with a low atomic number forming the outer surface of the cover and optionally a good electricity conducting material covering the inner surface of the mechanical structure.
Inventors
- 👤 Yves Valy
- 👤 Michel Gadbin
- 👤 Jean S. L. Banchelin
- 👤 Jean Bourcereau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:43
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10; G21F1/103; G21F1/106; H; H10; H10W; H10W42/00; H10W42/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A protective box for electronic circuits hardened with respect to x-rays, said protective box comprising a molded rigid mechanical structure of composite material constituted by a fiber-reinforced resin; an x-ray protection material covering at least parts of said mechanical structure capable of being irradiated by x-rays, said x-ray protection material being potted on said mechanical structure and composed of a resin matrix containing a regularly dispersed powder consisting of at least one metal and/or at least one inorganic compound of a metal, said powder having a melting temperature at least equal to 630° C., said metal and/or metal of the inorganic compound having a high atomic number at least equal to 47; and an anti-SGEMP material which at least partly covers the outer and/or inner surface of the mechanical structure.
Claim 2
Dependent Claim
130 words
A protective box for electronic circuits hardened with respect to x-rays, said protective box comprising a molded rigid mechanical structure of composite material constituted by a fiber-reinforced resin; an x-ray protection material covering at least parts of said mechanical structure capable of being irradiated by x-rays, said x-ray protection material being potted on said mechanical structure and composed of a resin matrix containing a regularly dispersed powder consisting of at least one metal and/or at least one inorganic compound of a metal, said powder having a melting temperature at least equal to 630° C., said metal and/or metal of the inorganic compound having a high atomic number at least equal to 47; and an anti-SGEMP material which at least partly covers the outer and/or inner surface of the mechanical structure.
Claim 3
Dependent Claim
21 words
A protective box according to claim 1, wherein the powder represents 25 to 50% by volume of the x-ray protection material.
Claim 4
Dependent Claim
25 words
A protective box according to claim 1, wherein the high atomic number metal is selected from the group consisting of silver, tantalum, tungsten and uranium.
Claim 5
Dependent Claim
28 words
A protective box according to claim 1, wherein the anti-SGEMP material includes at least one chemical element with a low atomic number at the most equal to 6.
Claim 6
Dependent Claim
24 words
A protective box according to claim 4, wherein the low atomic number element is selected from a group consisting of carbon, boron and beryllium.
Claim 7
Dependent Claim
29 words
A protective box according to claim 1, including an electrically conducive material covering the outer surface of the assembly composed of the mechanical structure and the x-ray protection material.
Claim 8
Dependent Claim
22 words
A protective box according to claim 1, including a material which is electrically conducive covering the inner surface of the mechanical structure.
Claim 9
Dependent Claim
24 words
A protective box according to claim 7, wherein the electricity conducting material is selected from the group consisting of silver, aluminum, beryllium and copper.
Claim 10
Dependent Claim
35 words
A protective box according to claim 1, wherein the mechanical structure is provided on its surface covered with the x-ray protection material with slots for improving the adhesion of said material to the mechanical structure.
Claim 11
Dependent Claim
21 words
A protective box according to claim 1, wherein the composite material constituting the mechanical structure is formed from a thermosetting resin.
Claim 12
Dependent Claim
29 words
A protective box according to claim 1, wherein said anti-SGEMP material has a thickness exceeding the free middle path of electrons emitted during an x-ray irradiation of said box.
References Cited (Backward Citations)
US1844512A
Cited
US2928948A
Cited
US3622432A
Cited
FR2406870A1
Cited
EP0128079A2
Cited
FR2584863A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |