US4862923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning hose
Assignee: Yokohama Rubber Co Ltd
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Filing: 1986-06-02
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Granted: 1989-09-05
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Expires: 2006-06-02
Abstract
Abstract A hose for auomotive air-conditioning, transporting or otherwise handling refrigerants is disclosed which comprises an inner and an outer cover and a reinforcement disposed therebetween, the inner tube including an inner and an outer peripheral wall and a polyamide layer laminated therebetween. The inner and outer peripheral walls have a specified range of elasticity, and the polyamide layer has a specified thickness, whereby the hose is rendered highly resistant to heat, moisture-permeation and refrigerant-permeable, and flexible, and further free of damage from creeps or cracks from dynamic fatigue in the vicinity of metal fitting applied on the hose.
Inventors
- 👤 Tetsu Kitami
- 👤 Jun Mito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; B; B60; B60H; B60H1/00; B60H1/00507; B60H1/00557; B60H1/00571
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A hose comprising an inner tube including an inner and an outer peripheral wall and a polyamide resin layer laminated therebetween, a reinforcement laminated over said outer peripheral wall, and an outer cover laminated over said reinforcement, said inner and outer peripheral walls having an elasticity by 100% modulus of 30-120 kgf/cm 2 , and said polyamide resin layer being in continuous for and having a thickness in the range of 0.1-1.0 mm.
Claim 2
Dependent Claim
73 words
A hose comprising an inner tube including an inner and an outer peripheral wall and a polyamide resin layer laminated therebetween, a reinforcement laminated over said outer peripheral wall, and an outer cover laminated over said reinforcement, said inner and outer peripheral walls having an elasticity by 100% modulus of 30-120 kgf/cm 2 , and said polyamide resin layer being in continuous for and having a thickness in the range of 0.1-1.0 mm.
Claim 3
Dependent Claim
40 words
A hose according to claim 1 wherein said inner and outer peripheral walls are formed by a material selected from the group consisting of chlorosulfonated polyethylene, chlorinated polyethylene, ethylene-propylene rubber, isoprene-isobutylene rubber, chlorinated or brominated butyl rubber, and nitril-butadiene rubber.
Claim 4
Dependent Claim
27 words
A hose according to claim 1 wherein said polyamide resin layer is formed by a material selected from the group consisting of 6-nylon, 66-nylon, 6/66-nylon and 11-nylon.
Claim 5
Dependent Claim
19 words
A hose according to claim 1 wherein said reinforcement is knitted from textile yarns of polyester, nylon or rayon.
Claim 6
Dependent Claim
24 words
A hose according to claim 1 wherein each of said inner and outer peripheral walls has a thickness in the range of 0.2-4.5 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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |