Patent US5934336A successfully refreshed from Google Patents.
US5934336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer tubing assembly for fluid and vapor handling systems
Assignee: TI Group Automotive Systems LLC
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Filing: 1996-01-29
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Granted: 1999-08-10
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Expires: 2016-01-29
Abstract
Abstract A multi-layer tubing assembly for use in fuel-line applications. An extruded innermost semi-conductive layer of ethylene tetrafluoroethylene has a surface resistivity in the range of 10 1 to 10 6 ohm/sq. An inner permeation-resistant layer of soft ethylene tetrafluoroethylene is coextruded around the innermost layer at temperatures below 600 degrees Fahrenheit. An adhesive layer of polymer blend coextruded around the inner layer has a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide. An outer layer of nylon 12 is coextruded around the adhesive layer.
Inventors
- 👤 Henry S. Hsich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:40
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/127; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B32; B32B; B32B1/00; B32B1/08; F16L9/00; F16L9/12; F16L9/121; F16L9/123; F16L9/125; B29K; B29K2027/00; B29K2027/06; B29K2027/12; B29K2027/18; B29L; B29L2023/00; B29L2023/005; F16L2011/047; Y; Y10; Y10S; Y10S138/00; Y10S138/01
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
73 words
A multi-layer tubing assembly comprising: an extuded innermost semi-conductive layer of ethylene tetrafluoroethylene; an inner permeation-resistant layer of soft ethylene tetrafluoroethylene coextruded around said innermost layer; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 2
Dependent Claim
73 words
A multi-layer tubing assembly comprising: an extuded innermost semi-conductive layer of ethylene tetrafluoroethylene; an inner permeation-resistant layer of soft ethylene tetrafluoroethylene coextruded around said innermost layer; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 3
Dependent Claim
27 words
A tubing assembly as claimed in claim 1 wherein said innermost layer has a surface resistivity in the range of about 10 1 to 10 6 ohm/sq.
Claim 4
Dependent Claim
22 words
A tubing assembly as claimed in claim 2 wherein said innermost layer comprises 1% to 10% by weight of conductive carbon black.
Claim 5
Dependent Claim
20 words
A tubing assembly as claimed in claim 1 wherein said inner layer is extruded at temperatures below 600 degrees Fahrenheit.
Claim 6
Dependent Claim
15 words
A tubing assembly as claimed in claim 1 wherein said outer layer is nylon 12.
Claim 7
Dependent Claim
27 words
A tubing assembly as claimed in claim 1 wherein said outer layer is comprised of a sublayer of nylon 6 and a cover layer of nylon 12.
Claim 8
Dependent Claim
63 words
A multi-layer tubing assembly comprising: an extruded inner semi-conductive and permeation-resistant layer of soft ethylene tetrafluroethyene; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 9
Dependent Claim
63 words
A multi-layer tubing assembly comprising: an extruded inner semi-conductive and permeation-resistant layer of soft ethylene tetrafluroethyene; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 10
Dependent Claim
27 words
A tubing assembly as claimed in claim 7 wherein said inner layer has a surface resistivity in the range of about 10 2 to 10 6 ohm/sq.
Claim 11
Dependent Claim
22 words
A tubing assembly as claimed in claim 8 wherein said inner layer comprises 1% to 6% by weight of conductive carbon black.
Claim 12
Dependent Claim
20 words
A tubing assembly as claimed in claim 9 wherein said inner layer is extruded at temperatures below 600 degrees Fahrenheit.
Claim 13
Dependent Claim
15 words
A tubing assembly as claimed in claim 7 wherein said outer layer is nylon 12.
Claim 14
Dependent Claim
27 words
A tubing assembly as claimed in claim 7 wherein said outer layer is comprised of a sublayer of nylon 6 and a cover layer of nylon 12.
Claim 15
Dependent Claim
61 words
A multi-layer tubing assembly comprising: an extruded inner permeation-resistant layer of soft ethylene tetrafluoroethylene; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 16
Dependent Claim
61 words
A multi-layer tubing assembly comprising: an extruded inner permeation-resistant layer of soft ethylene tetrafluoroethylene; an adhesive layer coextruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of polyamide coextruded around said adhesive layer.
Claim 17
Dependent Claim
20 words
A tubing assembly as claimed in claim 13 wherein said inner layer is extruded at temperatures below 600 degrees Fahrenheit.
Claim 18
Dependent Claim
15 words
A tubing assembly as claimed in claim 13 wherein said outer layer is nylon 12.
Claim 19
Dependent Claim
27 words
A tubing assembly as claimed in claim 13 wherein said outer layer is comprised of a sublayer of nylon 6 and a cover layer of nylon 12.
Claim 20
Dependent Claim
112 words
A multi-layer tubing assembly for use in liquid fuel-line applications comprising: an extruded innermost semi-conductive layer of ethylene tetrafluoroethylene mixed with 1% to 10% by weight of conductive carbon black, said innermost layer having a surface resistivity in the range of 10 2 to 10 5 ohm/sq.; an inner permeation-resistant layer of soft ethylene tetrafluoroethylene coextruded around said innermost layer at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
Claim 21
Dependent Claim
112 words
A multi-layer tubing assembly for use in liquid fuel-line applications comprising: an extruded innermost semi-conductive layer of ethylene tetrafluoroethylene mixed with 1% to 10% by weight of conductive carbon black, said innermost layer having a surface resistivity in the range of 10 2 to 10 5 ohm/sq.; an inner permeation-resistant layer of soft ethylene tetrafluoroethylene coextruded around said innermost layer at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
Claim 22
Dependent Claim
107 words
A multi-layer tubing assembly for use in liquid fuel-line applications comprising: an inner semi-conductive and permeation-resistant layer of soft ethylene tetrafluoroethylene mixed with 1% to 6% by weight of conductive carbon black, said inner layer having a surface resistivity in the range of 10 3 to 10 5 ohm/sq., and said inner layer being extruded at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
Claim 23
Dependent Claim
107 words
A multi-layer tubing assembly for use in liquid fuel-line applications comprising: an inner semi-conductive and permeation-resistant layer of soft ethylene tetrafluoroethylene mixed with 1% to 6% by weight of conductive carbon black, said inner layer having a surface resistivity in the range of 10 3 to 10 5 ohm/sq., and said inner layer being extruded at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
Claim 24
Dependent Claim
72 words
A multi-layer tubing assembly for use in vapor fuel-line applications comprising: an inner permeation-resistant layer of soft ethylene tetrafluoroethylene extruded at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
Claim 25
Dependent Claim
72 words
A multi-layer tubing assembly for use in vapor fuel-line applications comprising: an inner permeation-resistant layer of soft ethylene tetrafluoroethylene extruded at temperatures below 600 degrees Fahrenheit; an adhesive layer coextruded around said inner layer, said adhesive layer being a polymer blend having a multi-phase morphology wherein one phase is miscible with ethylene tetrafluoroethylene and another phase is miscible with polyamide; and an outer layer of nylon 12 coextruded around said adhesive layer.
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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) | 2002-08-09 | 2003-02-08 | 2003-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-09 | 2007-02-08 | 2007-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-09 | 2011-02-08 | 2011-08-10 | $7700.00 | Window Closed / Lapsed |