Patent US5076329A successfully refreshed from Google Patents.
US5076329A
Expired / Lapsed
US
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Layered fuel-line hose
Assignee: Technoflow Tube Systems GmbH
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Filing: 1990-10-31
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Granted: 1991-12-31
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Expires: 2010-10-31
Abstract
Abstract A layered tubing for use in a motor vehicle has five layers, namely a thick tubular outer layer formed of a Nylon 11 or Nylon 12, a thick tubular intermediate layer of Nylon 6, a thin tubular intermediate bonding layer between and bonded to the thick outer and intermediate layers and formed of polyethylene or polypropylene, a thin tubular intermediate solvent-blocking layer inside the thick layers and formed of a copolymer of ethylene and vinylalcohol, and an inner layer of Nylon 6 inside the blocking layer. The thick outer and intermediate layers each have a thickness of between 0.2 mm and 0.7 mm. The thin intermediate blocking layer comprises by weight 30% to 45% polyethylene and the intermediate blocking layer has a thickness of between 0.1 mm and 0.2 mm. The inner layer has a thickness of at most 0.1 to 0.5 mm and the bonding layer has active side chains of maleic acid anhydride and a thickness of between 0.05 mm and 0.2 mm.
Inventors
- 👤 Erwin Brunnhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:22
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/0011; F02M37/0017; B; B32; B32B; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; F16; F16L; F16L9/00; F16L9/12; B32B2250/00; B32B2250/05; B32B2250/24; B32B2307/00; B32B2307/50; B32B2307/54; B32B2307/558; B32B2597/00; B32B2605/00; B32B2605/08; Y; Y10; Y10S; Y10S138/00; Y10S138/07
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A layered tubing for use in a motor vehicle, the tubing comprising: a thick tubular outer layer formed of a Nylon 11 or Nylon 12; a thick tubular intermediate layer of Nylon 6; a thin tubular intermediate bonding layer between and bonded to the thick outer and intermediate layers and formed of polyethylene or polypropylene; a thin tubular intermediate solvent-blocking layer inside the thick layers and formed of a copolymer of ethylene and vinylalcohol; and an inner layer of Nylon 6 inside the blocking layer.
Claim 2
Dependent Claim
85 words
A layered tubing for use in a motor vehicle, the tubing comprising: a thick tubular outer layer formed of a Nylon 11 or Nylon 12; a thick tubular intermediate layer of Nylon 6; a thin tubular intermediate bonding layer between and bonded to the thick outer and intermediate layers and formed of polyethylene or polypropylene; a thin tubular intermediate solvent-blocking layer inside the thick layers and formed of a copolymer of ethylene and vinylalcohol; and an inner layer of Nylon 6 inside the blocking layer.
Claim 3
Dependent Claim
20 words
The tubing defined in claim 1 wherein the outer layer has a thickness of between 0.2 mm and 0.7 mm.
Claim 4
Dependent Claim
24 words
The tubing defined in claim defined in claim 1 wherein the thick intermediate layer has a thickness of between 0.2 mm and 0.7 mm.
Claim 5
Dependent Claim
19 words
The tubing defined in claim 1 wherein the thin intermediate blocking layer comprises by weight 30% to 45% polyethylene.
Claim 6
Dependent Claim
21 words
The tubing defined in claim 1 wherein the intermediate blocking layer has a thickness of between 0.1 mm and 0.2 mm.
Claim 7
Dependent Claim
20 words
The tubing defined in claim 1 wherein the inner layer has a thickness of at most 0.1 to 0.5 mm.
Claim 8
Dependent Claim
28 words
The tubing defined in claim 1 wherein the bonding layer has active side chains of maleic acid anhydride and a thickness of between 0.05 mm and 0.2 mm.
Claim 9
Dependent Claim
133 words
A layered tubing for use in a motor vehicle, the tubing comprising: a thick tubular outer layer formed of a Nylon 11 or Nylon 12 and having a thickness of between 0.2 mm and 0.7 mm. a thick tubular intermediate layer of Nylon 6 and having a thickness of between 0.2 mm and 0.7 mm; a thin tubular intermediate bonding layer between and bonded to the thick outer and intermediate layers, formed of polyethylene or polypropylene, and having a thickness of between 0.05 mm and 0.2 mm; a thin tubular intermediate solvent-blocking layer inside the outer layer, formed of a copolymer of ethylene and vinylalcohol, and having a thickness of between 0.1 mm and 0.2 mm; and an inner layer of Nylon 6 of a thickness of between 0.1 mm and 0.3 mm.
Claim 10
Dependent Claim
133 words
A layered tubing for use in a motor vehicle, the tubing comprising: a thick tubular outer layer formed of a Nylon 11 or Nylon 12 and having a thickness of between 0.2 mm and 0.7 mm. a thick tubular intermediate layer of Nylon 6 and having a thickness of between 0.2 mm and 0.7 mm; a thin tubular intermediate bonding layer between and bonded to the thick outer and intermediate layers, formed of polyethylene or polypropylene, and having a thickness of between 0.05 mm and 0.2 mm; a thin tubular intermediate solvent-blocking layer inside the outer layer, formed of a copolymer of ethylene and vinylalcohol, and having a thickness of between 0.1 mm and 0.2 mm; and an inner layer of Nylon 6 of a thickness of between 0.1 mm and 0.3 mm.
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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) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |