US2967796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tubular structures of laminated fibrous material
Assignee: Goodyear Aircraft Corp
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Filing: 1957-09-16
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Granted: 1961-01-10
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard D Raffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:42
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/44; B29C43/00; B29C43/02; B29C43/10; B29C43/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49346; Y10T29/49805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
THE METHOD OF MAKING A TUBULAR STRUCTURE OF SUBSTANTIALLY HOUR-GLASS SHAPE OF LAMINATED UNWOVEN FILAMENTS AND PLASTIC BINDING MATERIAL WHICH COMPRISES BUILDING ABOUT AN INFLATED EXPANSIBLE MANDREL IN SUBSTANTIALLY CYLINDRICAL SHAPE A SUBSTANTIALLY CYLINDRICAL BODY OF UNWOVEN CONCENTRIC PLIES OF FILAMENTS EXTENDING HELICALLY IN SUBSTANTIALLY PARALLEL RELATION WITH THE FILAMENTS OF EACH PLY HAVING A HELIX ANGLE OF LESS THAN 45 DEGREES AND THE FILAMENTS OF SUCCESSIVE PLIES BEING AT OPPOSITE ANGLES, CONFINING THE BODY IN A PASSAGE OF SUBSTANTIALLY THE DESIRED HOUR-GLASS SHAPE, EXPANDING THE BODY BY FURTHER INCREASED INFLATION OF THE MANDREL TO CONFORM TO SUCH PASSAGE BY FLUID PRESSURE APPLIED THEREWITHIN BY THE INFLATABLE MANDREL, REMOVING THE MANDREL, PLACING OPPOSED CORE MEMBERS IN OPPOSITE ENDS OF THE BODY, SAID CORE MEMBERS TOGETHER PROVIDING A RIGID CORE HAVING THE SHAPE OF THE INTERIOR OF THE DESIRED ARTICLE, CONFINING THE BODY AND CORE MEMBERS IN A CURING MOLD HAVING A MOLD CAVITY OF THE DESIRED SHAPE OF THE EXTERIOR OF THE ARTICLE, FORCING THE MOLD CORES AXIALLY TOGETHER TO COMPRESS AND CONFINE THE BODY, AND CURING THE CONFINED BODY.
Claim 2
Independent Claim
180 words
THE METHOD OF MAKING A TUBULAR STRUCTURE OF SUBSTANTIALLY HOUR-GLASS SHAPE OF LAMINATED UNWOVEN FILAMENTS AND PLASTIC BINDING MATERIAL WHICH COMPRISES BUILDING ABOUT AN INFLATED EXPANSIBLE MANDREL IN SUBSTANTIALLY CYLINDRICAL SHAPE A SUBSTANTIALLY CYLINDRICAL BODY OF UNWOVEN CONCENTRIC PLIES OF FILAMENTS EXTENDING HELICALLY IN SUBSTANTIALLY PARALLEL RELATION WITH THE FILAMENTS OF EACH PLY HAVING A HELIX ANGLE OF LESS THAN 45 DEGREES AND THE FILAMENTS OF SUCCESSIVE PLIES BEING AT OPPOSITE ANGLES, CONFINING THE BODY IN A PASSAGE OF SUBSTANTIALLY THE DESIRED HOUR-GLASS SHAPE, EXPANDING THE BODY BY FURTHER INCREASED INFLATION OF THE MANDREL TO CONFORM TO SUCH PASSAGE BY FLUID PRESSURE APPLIED THEREWITHIN BY THE INFLATABLE MANDREL, REMOVING THE MANDREL, PLACING OPPOSED CORE MEMBERS IN OPPOSITE ENDS OF THE BODY, SAID CORE MEMBERS TOGETHER PROVIDING A RIGID CORE HAVING THE SHAPE OF THE INTERIOR OF THE DESIRED ARTICLE, CONFINING THE BODY AND CORE MEMBERS IN A CURING MOLD HAVING A MOLD CAVITY OF THE DESIRED SHAPE OF THE EXTERIOR OF THE ARTICLE, FORCING THE MOLD CORES AXIALLY TOGETHER TO COMPRESS AND CONFINE THE BODY, AND CURING THE CONFINED BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |