Patent US5348779A successfully refreshed from Google Patents.
US5348779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant transporting hose having inner tube including resin layer, and connector for the same
Assignee: Sumitomo Riko Co Ltd
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Filing: 1993-08-06
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Granted: 1994-09-20
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Expires: 2013-08-06
Abstract
Abstract A refrigerant transporting hose having a laminar structure including an inner tube consisting of at least one layer, an outer tube disposed radially outwardly of and coaxially with the inner tube, and a reinforcing fiber layer interposed between the inner and outer tubes. The inner tube includes a resin layer formed of a resin composition which consists of a blend of modified polyolefin and polyamide resin, and 1-10% by weight of epsilon -caprolactam. A proportion by weight of the modified polyolefin to the polyamide resin is selected within a range between 40/60 and 10/90. The hose may have a sealing layer formed on the inner surface of the inner tube. The sealing layer consists of a chlorinated elastomer containing a dispersion of an acid receptive agent. Alternately, the sealing layer may be provided on the outer surface of a hose connector nipple.
Inventors
- 👤 Ichiro Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:17
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; B; B60; B60H; B60H1/00; B60H1/00507; B60H1/00557; B60H1/00571; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/1386; Y10T428/139; Y10T428/1393
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A hose-connector combination consisting of a refrigerant transporting hose having an end portion and a laminar structure including an inner tube consisting of at least one layer, an outer tube disposed radially outwardly of and coaxially with the inner tube, and a reinforcing fiber layer interposed between the inner and outer tubes, said inner tube including a resin layer formed of a resin composition which consists essentially of a blend of modified polyolefin and polyamide resin, and 1-10% by weight of ε-caprolactam, the proportion by weight of said modified polyolefin to said polyamide resin being within a range between 40/60 and 10/90 and a connector having a nipple on which the end portion of the hose is fitted, wherein the improvement comprises: a sealing layer interposed between an outer circumferential surface of said nipple and an inner surface of said inner tube of said hose, said sealing layer formed of a chlorinated elastomer containing a dispersion of an acid receptive agent.
Claim 2
Dependent Claim
161 words
A hose-connector combination consisting of a refrigerant transporting hose having an end portion and a laminar structure including an inner tube consisting of at least one layer, an outer tube disposed radially outwardly of and coaxially with the inner tube, and a reinforcing fiber layer interposed between the inner and outer tubes, said inner tube including a resin layer formed of a resin composition which consists essentially of a blend of modified polyolefin and polyamide resin, and 1-10% by weight of ε-caprolactam, the proportion by weight of said modified polyolefin to said polyamide resin being within a range between 40/60 and 10/90 and a connector having a nipple on which the end portion of the hose is fitted, wherein the improvement comprises: a sealing layer interposed between an outer circumferential surface of said nipple and an inner surface of said inner tube of said hose, said sealing layer formed of a chlorinated elastomer containing a dispersion of an acid receptive agent.
Claim 3
Dependent Claim
34 words
A hose connector combination according to claim 1, wherein said chlorinated elastomer contains said acid receptive agent in an amount within a range of 5-25% by weight, per 100% by weight of said elastomer.
Claim 4
Dependent Claim
30 words
A hose connector combination according to claim 1, wherein said acid receptive agent is selected from the group consisting of MgO, PbO, hydrotalcite, epoxy resin, and dibasic phthalic acid salt.
References Cited (Backward Citations)
GB1017653A
Cited
DE2505700A1
Cited
US4018460A
Cited
US4994524A
Cited
JPS62147188A
Cited
US4690435A
Cited
DE3739089A1
Cited
US4907625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |