Patent US3640798A successfully refreshed from Google Patents.
US3640798A
Expired / Lapsed
US
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Composite structural core assembly
Assignee: Individual
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Filing: 1969-04-16
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Granted: 1972-02-08
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Expires: 1989-04-16
Abstract
Abstract A curved laminated structure comprising a series of generally longitudinally extending stringers are assembled generally transversely adjacent, each stringer being composed of upright webs extending alternately solely longitudinally and transversely defining a longitudinal series of stringer web enclosures opening at opposite web edges. The webs have elongated members such as rods extending through them. The enclosures or cells are preferably filled with polymer foam.
Inventors
- 👤 Douglas Deeds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:30
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E04C2/02; E04C2/10; E04C2/20; E04C2/205; E04C2/32; E04C5/00; E04C5/01; E04C5/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
In a composite structural core assembly, the combination of: a series of generally longitudinally extending and generally transversely adjacent stringers, each of said stringers being formed by a pair of substantially rigid, upright webs secured to one anoTher at spaced intervals along the longitudinal extension thereof and configured to define a longitudinal series of web enclosures encompassing stringer voids opening at opposite common web edges, each of said stringers being formed of generally longitudinally and generally transversely extending web parts, and each of said web enclosures being formed totally of spaced longitudinal and spaced transverse web parts, certain of said stringers being curved in longitudinal extension in directions toward said common web edges, the common web edges of said certain stringers defining progressively curved surfaces; said stringers being positioned with said stringer web enclosures transversely spaced from transversely adjacent stringers, and certain of said longitudinal web parts of certain of said stringer web enclosures being formed with elongated joining members extending between and through adjacent stringers; and a pair of substantially rigid, opposite surface layers secured to said stringer common web edges and extending along and generally conforming to said progressively curved surfaces.
Claim 2
Dependent Claim
193 words
In a composite structural core assembly, the combination of: a series of generally longitudinally extending and generally transversely adjacent stringers, each of said stringers being formed by a pair of substantially rigid, upright webs secured to one anoTher at spaced intervals along the longitudinal extension thereof and configured to define a longitudinal series of web enclosures encompassing stringer voids opening at opposite common web edges, each of said stringers being formed of generally longitudinally and generally transversely extending web parts, and each of said web enclosures being formed totally of spaced longitudinal and spaced transverse web parts, certain of said stringers being curved in longitudinal extension in directions toward said common web edges, the common web edges of said certain stringers defining progressively curved surfaces; said stringers being positioned with said stringer web enclosures transversely spaced from transversely adjacent stringers, and certain of said longitudinal web parts of certain of said stringer web enclosures being formed with elongated joining members extending between and through adjacent stringers; and a pair of substantially rigid, opposite surface layers secured to said stringer common web edges and extending along and generally conforming to said progressively curved surfaces.
Claim 3
Dependent Claim
44 words
A composite structural core assembly as defined in claim 1 in which a final shape-self-sustaining, cellular foam is positioned between said surface layers substantially filling between said stringers and said stringer web enclosures and adhering to said surface layers and to said stringer webs.
Claim 4
Dependent Claim
21 words
A composite structural core assembly as defined in claim 1 in which said stringer web enclosures are generally rectangular web enclosures.
Claim 5
Dependent Claim
46 words
A composite structural core assembly as defined in claim 1 in which said stringer web enclosures are rectangular web enclosures and in which successive ones of said web enclosures of each stringer are separated by a pair of longitudinally extending web parts secured to one another.
Claim 6
Dependent Claim
52 words
A composite structural core assembly as defined in claim 1 in which each of said stringer web enclosures is formed by at least two longitudinally aligned and longitudinally spaced U-shaped web parts and at least two transversely aligned and transversely spaced U-shaped web parts all opening into a common central enclosure part.
Claim 7
Dependent Claim
62 words
A composite structural core assembly as defined in claim 1 in which said stringer web enclosures are rectangular web enclosures and each of said web enclosures of each stringer is defined by a pair of transversely spaced longitudinally extending web parts; and in which said last-named longitudinally extending web parts of stringer web enclosures on transversely adjacent stringers are abutting and secured.
Claim 8
Dependent Claim
27 words
A composite structural core assembly as defined in claim 1 in which certain of said longitudinal web parts of said stringers are convoluted in longitudinal extension thereof.
Claim 9
Dependent Claim
35 words
A composite structural core assembly as defined in claim 1 in which certain of said opposite common web edges of said stringer webs are formed flanged extending parallel to and secured to said surface layers.
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |