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US4048360A
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US
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Low-weight dent-resistant structure and method for production thereof
Assignee: Airbus Defence and Space GmbH
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Filing: 1975-04-24
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Granted: 1977-09-13
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Expires: 1995-04-24
Abstract
Abstract A low-weight, dent-resistant hollow structure composed of spaced apart ou sheets and an inner supporting core, the inner supporting core being formed from a plurality of rigid fibrous nets impregnated with a hardened resin, some of said nets being parallel to and contiguous with the outer sheets and other of said nets being disposed perpendicularly to and secured to the parallel nets so as to maintain the outer sheets in a spaced apart position. Such structures are particularly useful in devices for aviation and space travel. Methods for forming the structure are disclosed herein.
Inventors
- 👤 Wolfgang Jonda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B64; B64C; B64C1/00; B64C1/06; B64C1/065; E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/292; B32B2305/00; B32B2305/08; B64C2001/0054; B64C2001/0072; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10S; Y10S264/00; Y10S264/81; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/24132; Y10T428/24174; Y10T428/24744; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
In a lightweight dent-resistant hollow structure of the type composed of two spaced apart outer sheets and an inner supporting core, the improvement which comprises said supporting core being composed of a series of rigid support sheets composed of resin-reinforced fibers in the form of a net, wherein at least one support sheet is parallel to and contiguous with each outer sheet and a plurality of said support sheets are disposed perpendicularly to and are secured to the parallel support sheets to maintain the outer sheets in said spaced apart position.
Claim 2
Dependent Claim
91 words
In a lightweight dent-resistant hollow structure of the type composed of two spaced apart outer sheets and an inner supporting core, the improvement which comprises said supporting core being composed of a series of rigid support sheets composed of resin-reinforced fibers in the form of a net, wherein at least one support sheet is parallel to and contiguous with each outer sheet and a plurality of said support sheets are disposed perpendicularly to and are secured to the parallel support sheets to maintain the outer sheets in said spaced apart position.
Claim 3
Dependent Claim
14 words
The structure of claim 1 wherein said supporting core possesses a rectangular cross section.
Claim 4
Dependent Claim
16 words
The structure of claim 1 wherein said supporting core possesses an "I beam" shaped cross section.
References Cited (Backward Citations)
US2105324A
Cited
US3544417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |