US5264262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant transporting hose having inner tube including resin layer
Assignee: Sumitomo Riko Co Ltd
•
Filing: 1991-08-29
•
Granted: 1993-11-23
•
Expires: 2011-08-29
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
2026-10-26 05:16
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: 11
Claim 1
Independent Claim
97 words
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, wherein the improvement comprises: 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, a proportion by weight of said modified polyolefin to said polyamide resin being within a range between 40/60 and 10/90.
Claim 2
Dependent Claim
97 words
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, wherein the improvement comprises: 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, a proportion by weight of said modified polyolefin to said polyamide resin being within a range between 40/60 and 10/90.
Claim 3
Dependent Claim
36 words
A refrigerant transporting hose according to claim 1, wherein said inner tube further includes an inner rubber layer radially outwardly adjacent to said resin layer, said inner rubber layer being formed of a non-polar rubber material.
Claim 4
Dependent Claim
24 words
A refrigerant transporting hose according to claim 2, wherein said resin layer and said inner rubber layer are bonded together by an adhesive agent.
Claim 5
Dependent Claim
25 words
A refrigerant transporting hose according to claim 2, wherein said inner tube further includes an innermost rubber layer radially inwardly adjacent to said resin layer.
Claim 6
Dependent Claim
18 words
A refrigerant transporting hose according to claim 1, wherein said inner tube consists solely of said resin layer.
Claim 7
Dependent Claim
25 words
A refrigerant transporting hose according to claim 1, wherein said inner tube further includes an innermost rubber layer radially inwardly adjacent to said resin layer.
Claim 8
Dependent Claim
19 words
A refrigerant transporting hose according to claim 1, wherein said proportion is within a range between 30/70 and 20/80.
Claim 9
Dependent Claim
26 words
A refrigerant transporting hose according to claim 1, wherein a content of said ε-caprolactam of said resin composition is within a range of 3-7% by weight.
Claim 10
Dependent Claim
46 words
A refrigerant transporting hose according to claim 1, wherein said inner tube has an inner surface covered by a sealing layer at least at an end portion thereof, said sealing layer being formed of a chlorinated elastomer which contains a dispersion of an acid receptive agent.
Claim 11
Dependent Claim
34 words
A refrigerant transporting hose according to claim 9, 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.
References Cited (Backward Citations)
GB1017653A
Cited
DE2505700A1
Cited
US4994524A
Cited
JPS62147188A
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) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |