Patent US4168337A successfully refreshed from Google Patents.
US4168337A
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Three dimensional structure for reinforcement
Assignee: Societe Europeenne de Propulsion SEP SA
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Filing: 1978-04-14
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Granted: 1979-09-18
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Expires: 1998-04-14
Abstract
Abstract The reinforcement for a reinforced three dimensional structure comprises four bundles of rectilinear elements with the elements of each bundle arranged in the form of spaced parallel sheets with the sheets of two of the bundles parallel to one another and alternately disposed, the sheets of the other two bundles being similarly arranged but inclined to the sheets of the first mentioned bundles.
Inventors
- 👤 Michel A. J. Maistre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:55
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/125; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/24; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; D04; D04H; D04H3/00; D04H3/02; D04H3/07; F; F02; F02K; F02K9/00; F02K9/97; F02K9/974; F05; F05D; F05D2250/00; F05D2250/20; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24124; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/2973
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
A four-directional reinforcement structure for a composite material consisting of a first, a second, a third and a fourth bundle each consisting of a plurality of elongated rectilinear parallely spaced elements extending parallel to a respective direction and arranged into a plurality of rows, the elements of each bundle extending diagonally to the elements of at least two of the other bundles, each row having a plurality of said elements in parallel, spaced planar relation, said first and second bundles having a plurality of rows, said rows of said first and said second bundles being respectively disposed in alternate parallel planes, said third and said fourth bundles also having a plurality of rows, said rows of said third and fourth bundles also being respectively disposed in alternate parallel planes, the parallel planes of said first and second bundles being at an angle to the parallel planes of said third and fourth bundles, the elements of said third and fourth bundles passing through spaces provided between the elements of said first and second bundles.
Claim 2
Dependent Claim
173 words
A four-directional reinforcement structure for a composite material consisting of a first, a second, a third and a fourth bundle each consisting of a plurality of elongated rectilinear parallely spaced elements extending parallel to a respective direction and arranged into a plurality of rows, the elements of each bundle extending diagonally to the elements of at least two of the other bundles, each row having a plurality of said elements in parallel, spaced planar relation, said first and second bundles having a plurality of rows, said rows of said first and said second bundles being respectively disposed in alternate parallel planes, said third and said fourth bundles also having a plurality of rows, said rows of said third and fourth bundles also being respectively disposed in alternate parallel planes, the parallel planes of said first and second bundles being at an angle to the parallel planes of said third and fourth bundles, the elements of said third and fourth bundles passing through spaces provided between the elements of said first and second bundles.
Claim 3
Dependent Claim
19 words
A structure as claimed in claim 1, wherein the rows in each bundle are arranged in a staggered relationship.
Claim 4
Dependent Claim
29 words
A structure as claimed in claim 1, wherein all elements of the structure are inclined at a same angle with respect to an axis of symmetry of the structure.
Claim 5
Dependent Claim
25 words
A structure as claimed in claim 1, wherein the elements of the four bundles are respectively parallel to the four heights of a regular tetrahedron.
Claim 6
Dependent Claim
41 words
A structure as claimed in claim 1, wherein the axes of the elements in each row are spaced from one another by a distance equal to twice the diameter of the smallest circle enclosing the cross-section of one of said elements.
Claim 7
Dependent Claim
45 words
A structure as claimed in claim 1, wherein the rows of each bundle are disposed in planes separated from each other by a distance equal to an integral multiple of the diameter of the largest circle enclosed by the cross-section of one of said elements.
Claim 8
Dependent Claim
13 words
A structure as claimed in claim 1, wherein said elements have identical cross-sections.
Claim 9
Dependent Claim
14 words
A structure as claimed in claim 1, wherein said elements have a hexagonal cross-section.
Claim 10
Dependent Claim
17 words
A structure as claimed in claim 1, wherein at least a part of said elements are rigid.
Claim 11
Dependent Claim
17 words
A structure as claimed in claim 1, wherein at least a part of said elements are flexible.
Claim 12
Dependent Claim
14 words
A structure as set forth in claim 1, wherein the elements are carbon fibres.
References Cited (Backward Citations)
US3169611A
Cited
US3949126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |