Patent US3857548A successfully refreshed from Google Patents.
Patent US3901281A successfully refreshed from Google Patents.
US3901281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft fuel line
Assignee: United States Department of the Air Force
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Filing: 1972-12-27
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Granted: 1975-08-26
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Expires: 1992-12-27
Abstract
Abstract A fuel line is provided that comprises a metallic tube, a resinimpregnated reinforcing fiber or yarn covering the tube, a polymeric foam material covering the reinforcing fiber or yarn, a resin-impregnated reinforcing fiber or yarn covering the foam material, and a self-sealing material covering the last-mentioned reinforcing fiber or yarn.
Inventors
- 👤 Edward J Morrisey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L55/00; F16L55/16; F16L55/1616; F16L58/1054; F16L58/1063
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A FUEL LINE COMPRISING A METAL TUBE, A FIRST LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERAL IN THE FORM OF A FILAMENT OR YARN WOUND ON THE METAL TUBE, A LAYER OF A FOAMED PLASTIC MATERIAL COVERING SAID FIRST LAYER, A SECOND LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERIAL IN THE FORM OF A FILAMENT OR YARN WOUND ON SAID LAYER OF A FOAMED PLASTIC MATERIAL, A LAYER OF A SELF-SEALING MATERIAL COVERING SAID SECOND LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERIAL, AND A LAYER OF A PROTESIVE MATERIAL, SAID PROTECTIVE MATERIAL COMPRISING WINDINGS OF A FIBER OR TAPE WITH A PROTECTIVE COATING APPLIED THERETO COVERING SAID LAYER OF A SELF-SEALING MATERIAL.
Claim 2
Dependent Claim
112 words
A FUEL LINE COMPRISING A METAL TUBE, A FIRST LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERAL IN THE FORM OF A FILAMENT OR YARN WOUND ON THE METAL TUBE, A LAYER OF A FOAMED PLASTIC MATERIAL COVERING SAID FIRST LAYER, A SECOND LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERIAL IN THE FORM OF A FILAMENT OR YARN WOUND ON SAID LAYER OF A FOAMED PLASTIC MATERIAL, A LAYER OF A SELF-SEALING MATERIAL COVERING SAID SECOND LAYER OF A CURED RESIN-IMPREGNATED REINFORCING MATERIAL, AND A LAYER OF A PROTESIVE MATERIAL, SAID PROTECTIVE MATERIAL COMPRISING WINDINGS OF A FIBER OR TAPE WITH A PROTECTIVE COATING APPLIED THERETO COVERING SAID LAYER OF A SELF-SEALING MATERIAL.
Claim 3
Dependent Claim
25 words
A fuel line according to claim 1 in which the reinforcing material is selected from the group consisting of glass, quartz, carbon and graphite fibers.
Claim 4
Dependent Claim
29 words
A fuel line according to claim 2 in which the fibers are helically wound or braided onto the metal tube and onto said layer of a foameD plastic material.
Claim 5
Dependent Claim
28 words
A fuel line according to claim 2 in which the foamed plastic material is selected from the group consisting of polyvinyl chloride foam, polypropylene foam, and polyurethane foam.
Claim 6
Dependent Claim
25 words
A fuel line according to claim 4 in which the self-sealing material is a partially cured elastomer which swells upon contact with a hydrocarbon fuel.
Claim 7
Dependent Claim
25 words
A fuel line according to claim 5 in which the elastomer is selected from the group consisting of natural rubber, silicone rubber, polybutadiene and polyisoprene.
Claim 8
Dependent Claim
27 words
A fuel line according to claim 1 in which said fiber or tape is formed of nylon, rayon or asbestos and said protective coating is urethane varnish.
Claim 9
Dependent Claim
20 words
A fuel line according to claim 7 in which the metal tube is an aluminum, stainless steel or titanium tube.
References Cited (Backward Citations)
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |