US3904464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making three-dimensional fabric material
Assignee: Avco Corp
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Filing: 1972-01-24
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Granted: 1975-09-09
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Expires: 1992-01-24
Abstract
Abstract Three-dimensional impregnated filamentary materials and methods for making the same.
Inventors
- 👤 Robert W King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:45
CPC Classifications
D; D03; D03D; D03D41/00; D03D41/004
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
218 words
A METHOD FOR FABRICATING A THREE--DIMENSIONAL STRUCTURE HAVING A CURVED SURFACE COMPRISING: A. ORIENTING A FIRST GROUP OF FILAMENTS TO EXTEND RADIALLY THROUGH THE SPACE CORRESPONDING TO THE SHELL OF THE CURVED SURFACE, SUCH FILAMENTS BEING SIZED AND SPACED TO FORM A FIRST SET OF ROWS, SUCH FILAMENTS ALSO BEING SIZED AND SPACED IN SAID FIRST SET OF ROWS TO FORM A SECOND SET OF ROWS WHICH INTERSECTS THE FIRST SET, B. WEAVING INTO SAID FIRST GROUP OF FILAMENTS ALONG THE FIRST SET OF ROWS A SECOND GROUP OF FILAMENTS, C. WEAVING INTO SAID FIRST GROUP OF FILAMENTS ALONG THE SECOND SET OF ROWS A THIRD GROUP OF FILAMENTS CONTIGUOUS WITH THE WOVEN SECOND GROUP OF FILAMENTS, D. SUCH FILAMENTS BEING SIZED AND SPACED RELATIVE TO EACH OTHER SUCH THAT THE FILAMENTS OF EACH GROUP ARE IN CLOSE FRICTIONAL CONTACT WITH THE FILAMENTS OF EACH OTHER GROUP, E. REPETITIVELY WEAVING SUCH SECOND AND THIRD GROUP FILAMENTS INTO THE FIRST GROUP IN SAID MANNER TO FORM THE CURVED THREE-DIMENSIONAL STRUCTURE OF THE DESIRED SHAPE, AND F. COMPRESSING THE CONTIGUOUS X AND Y AXIS FILAMENT ALONG THE Z AXIS INTO CLOSE MESHING CONTACT WITH EACH OTHER AND WITH THE Z AXIS FILAMENTS, AND IMPREGNATING SAID STRUCTURE WITH CURE-HARDENABLE LIQUID MATRIX SUBSTANCE, AND CURING SAID IMPREGNATED STRUCTURE TO A HARDENED STATE.
Claim 2
Independent Claim
218 words
A METHOD FOR FABRICATING A THREE--DIMENSIONAL STRUCTURE HAVING A CURVED SURFACE COMPRISING: A. ORIENTING A FIRST GROUP OF FILAMENTS TO EXTEND RADIALLY THROUGH THE SPACE CORRESPONDING TO THE SHELL OF THE CURVED SURFACE, SUCH FILAMENTS BEING SIZED AND SPACED TO FORM A FIRST SET OF ROWS, SUCH FILAMENTS ALSO BEING SIZED AND SPACED IN SAID FIRST SET OF ROWS TO FORM A SECOND SET OF ROWS WHICH INTERSECTS THE FIRST SET, B. WEAVING INTO SAID FIRST GROUP OF FILAMENTS ALONG THE FIRST SET OF ROWS A SECOND GROUP OF FILAMENTS, C. WEAVING INTO SAID FIRST GROUP OF FILAMENTS ALONG THE SECOND SET OF ROWS A THIRD GROUP OF FILAMENTS CONTIGUOUS WITH THE WOVEN SECOND GROUP OF FILAMENTS, D. SUCH FILAMENTS BEING SIZED AND SPACED RELATIVE TO EACH OTHER SUCH THAT THE FILAMENTS OF EACH GROUP ARE IN CLOSE FRICTIONAL CONTACT WITH THE FILAMENTS OF EACH OTHER GROUP, E. REPETITIVELY WEAVING SUCH SECOND AND THIRD GROUP FILAMENTS INTO THE FIRST GROUP IN SAID MANNER TO FORM THE CURVED THREE-DIMENSIONAL STRUCTURE OF THE DESIRED SHAPE, AND F. COMPRESSING THE CONTIGUOUS X AND Y AXIS FILAMENT ALONG THE Z AXIS INTO CLOSE MESHING CONTACT WITH EACH OTHER AND WITH THE Z AXIS FILAMENTS, AND IMPREGNATING SAID STRUCTURE WITH CURE-HARDENABLE LIQUID MATRIX SUBSTANCE, AND CURING SAID IMPREGNATED STRUCTURE TO A HARDENED STATE.
Claim 3
Dependent Claim
144 words
A method for fabricating a three-dimensional structure having a curved surface as claimed in claim 1, wherein said first group filament orienting step comprises: a. wrapping pre-impregnated filament around a plurality of separate relatively thin, generally rectangular forms, b. mounting the wrapped forms radially in a holding means, the size and shape of the forms and holding means and the number of windings on said forms being selected to provide a tightly packed shell corresponding to the dimensions of the shell of the finished structure, c. severing the filaments at their edges corresponding to the surface of the structure, d. curing the filaments to a hardened state, e. removing the form from said filaments, the resulting recesses forming and first set of rows, and f. forming the second set of rows in said filaments by matching rows into the peripheries of said hardened filaments.
References Cited (Backward Citations)
US2495808A
Cited
US3322868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |