Patent US4235398A successfully refreshed from Google Patents.
US4235398A
Expired / Lapsed
US
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Thermal insulation for aircraft fuselage
Assignee: Boeing Co
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Filing: 1978-12-18
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Granted: 1980-11-25
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Expires: 1998-12-18
Abstract
Abstract Thermal insulating apparatus for an aircraft fuselage of the type utilizing a sandwich panel construction. A foam insulation panel is provided which includes a plurality of standoffs for contacting the inwardly-facing skin of the sandwich panel. The standoffs may be arranged in a grid pattern, molded integrally with the rest of the panel, and bonded to the skin of the sandwich panel. The insulation panel may be used with or without a trim panel between it and the fuselage compartment, and in either case a sheet of metal foil may be attached to the inside face of the insulation panel. The foam may be of the self-skinning type so as to resist penetration of moisture into the foam panel and help direct condensate away from the fuselage compartment.
Inventors
- 👤 William R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:01
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B15/00; B32B15/04; B32B15/046; B32B15/20; B64; B64C; B64C1/00; B64C1/06; B64C1/066; B64C1/067; B64C1/40; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7608; E04B1/7612; E04B1/7675; B32B2307/00; B32B2307/30; B32B2307/304; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/24; Y10T428/24149; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
A shell for an aircraft fuselage, said shell comprising the combination of: a metal outer skin, a metal inner skin, a honeycomb core sandwiched between said inner and outer skins, and a foam insulation panel including a plurality of standoff portions integral therewith and bonded to said inner skin.
Claim 2
Dependent Claim
49 words
A shell for an aircraft fuselage, said shell comprising the combination of: a metal outer skin, a metal inner skin, a honeycomb core sandwiched between said inner and outer skins, and a foam insulation panel including a plurality of standoff portions integral therewith and bonded to said inner skin.
Claim 3
Dependent Claim
20 words
A shell for an aircraft fuselage as in claim 1 wherein said standoff portions are arranged in a grid pattern.
Claim 4
Dependent Claim
19 words
A shell for an aircraft fuselage as in claim 1 wherein said insulation panel is molded from self-skinning foam.
Claim 5
Dependent Claim
43 words
A shell for an aircraft fuselage as in claim 1 wherein the fuselage has a fuselage compartment including a ceiling, said foam insulation panel comprising a plurality of segments one of which extends continuously at least across the full width of said ceiling.
Claim 6
Dependent Claim
44 words
A shell for an aircraft fuselage as in claim 1 wherein said insulation panel defines a face on the same side of said insulation panel as said standoffs, said face and the sides of said standoffs providing a surface which is impervious to liquids.
Claim 7
Dependent Claim
26 words
A shell for an aircraft fuselage as in claim 5 wherein a single space is defined between said surface and said inner skin for collecting liquids.
Claim 8
Dependent Claim
26 words
A shell for an aircraft fuselage as in claim 1 including a trim panel, said insulation panel sandwiched between said inner skin and said trim panel.
Claim 9
Dependent Claim
43 words
A shell for an aircraft fuselage as in claim 7 wherein said insulation panel defines a continuous face on an opposite side of said insulation panel from said standoff portions, said continuous face contoured to a corresponding adjacent surface of said trim panel.
Claim 10
Dependent Claim
36 words
A shell for an aircraft fuselage as in claim 1 including a sheet of metal foil attached to a face of said insulation panel on the opposite side of said insulation panel from said standoff portions.
Claim 11
Dependent Claim
19 words
A shell for an aircraft fuselage as in claim 9 wherein said sheet of metal foil is aluminum foil.
Claim 12
Dependent Claim
20 words
A shell for an aircraft fuselage as in claim 1 wherein said insulation panel is molded from a self-supporting foam.
Claim 13
Dependent Claim
120 words
In an aircraft fuselage having a metal outer skin, a metal inner skin, a honeycomb core sandwiched between said inner and outer skins, and a trim panel; a thermal-insulating structure comprising: an integral self-supporting foam insulation panel sandwiched between said inner skin and said trim panel; said insulation panel including an inner face adjacent said trim panel, an outer face, and a plurality of standoffs arranged in a grid pattern along said outer face; said standoffs each including an outer surface portion bonded to said inner skin; said insulation panel molded from a self-skinning foam and providing a liquid-impervious surface along said outer face; said liquid-impervious surface and said inner skin defining a single chamber there-between for containing liquid condensate.
Claim 14
Dependent Claim
120 words
In an aircraft fuselage having a metal outer skin, a metal inner skin, a honeycomb core sandwiched between said inner and outer skins, and a trim panel; a thermal-insulating structure comprising: an integral self-supporting foam insulation panel sandwiched between said inner skin and said trim panel; said insulation panel including an inner face adjacent said trim panel, an outer face, and a plurality of standoffs arranged in a grid pattern along said outer face; said standoffs each including an outer surface portion bonded to said inner skin; said insulation panel molded from a self-skinning foam and providing a liquid-impervious surface along said outer face; said liquid-impervious surface and said inner skin defining a single chamber there-between for containing liquid condensate.
Claim 15
Dependent Claim
22 words
In an aircraft fuselage as in claim 12 including an aluminum foil sheet attached to said inner face of said insulation panel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |