US4998564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant-transporting hose
Assignee: Sumitomo Riko Co Ltd
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Filing: 1989-05-30
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Granted: 1991-03-12
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Expires: 2009-05-30
Abstract
Abstract A refrigerant-transporting hose including an elastic tube through which a refrigerant is transported, the elastic tube including a tubular resinous layer formed of a resinous composition, the resinous composition containing as a major component thereof a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms. The resinous composition may contain as a major component thereof a mixture of saponified ethylene-vinyl acetate copolymer and a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms.
Inventors
- 👤 Ichiro Igarashi
- 👤 Hiroaki Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:43
CPC Classifications
B; B32; B32B; B32B1/00; B32B1/08; B32B25/00; B32B25/04; B32B25/08; B32B27/00; B32B27/12; B32B27/34; B32B7/00; B32B7/04; B32B7/12; B60; B60H; B60H1/00; B60H1/00507; B60H1/00557; B60H1/00571; C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L77/00; F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/125; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/70; B32B2307/724; B32B2307/7242; F16L2011/047
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A refrigerant-transporting hose comprising: an elastic tube through which a refrigerant is transported, said elastic tube including a tubular resinous layer formed of a resinous composition, said resinous composition containing as a major component thereof a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms, said resinous composition further containing saponified ethylene-vinyl acetate copolymer.
Claim 2
Dependent Claim
66 words
A refrigerant-transporting hose comprising: an elastic tube through which a refrigerant is transported, said elastic tube including a tubular resinous layer formed of a resinous composition, said resinous composition containing as a major component thereof a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms, said resinous composition further containing saponified ethylene-vinyl acetate copolymer.
Claim 3
Dependent Claim
55 words
The hose as set forth in claim 1, further comprising an outer tube of a rubber material located radially outwardly of said elastic tube, and a reinforcing fiber layer interposed between said elastic tube and said outer tube, such that said reinforcing fiber layer and the elastic and outer tubes constitute an integral tubular body
Claim 4
Dependent Claim
43 words
The hose as set forth in claim 1, wherein said elastic tube further includes at least one of an inner rubber layer located radially inwardly of said tubular resinous layer, and an outer rubber layer located radially outwardly of the tubular resinous layer.
Claim 5
Dependent Claim
33 words
The hose as set forth in claim 1, wherein said aliphatic dicarboxylic acid is expressed by the following formula: HOOC--R--COOH where R is an aliphatic residue having from six to fourteen carbon atoms.
Claim 6
Dependent Claim
43 words
The hose as set forth in claim 4, wherein said aliphatic dicarboxylic acid comprises at least one acid selected from the group consisting of suberic acid, azelaic acid, sebacic acid, undecanedicarboxylic acid, dodecanedicarboxylic acid, tridecanedicarboxylic acid, tetradecanedicarboxylic acid, pentadecanedicarboxylic acid, and hexadecanedicarboxylic acid.
Claim 7
Dependent Claim
35 words
The hose as set forth in claim 1, wherein said resinous composition contains not more than 250 parts by weight of said saponified ethylene-vinyl acetate copolymer per 100 parts by weight of said polyamide resin.
Claim 8
Dependent Claim
39 words
The hose as set forth in claim 1 wherein said saponified ethylene-vinyl acetate copolymer contains not more than 40 mol% of ethylene and not less than 90 mol% of the vinyl acetate of the ethylene-vinyl acetate copolymer are saponified.
Claim 9
Dependent Claim
40 words
The hose as set forth in claim 1, wherein said resinous composition further contains at least one polyethylene rubber, chlorinated polyethylene, polymer of epichlorohydrin, copolymer of epichlorohydrin and ethylene oxide, chlorinated isobutylene-isoprene rubber, ethylene propylene diene rubber, and acrylonitrile-butadiene rubber.
Claim 10
Dependent Claim
35 words
The hose as set forth in claim 8, wherein said resinous composition contains not more than 70 parts by weight of said at least one rubber per 100 parts by weight of said polyamide resin.
Claim 11
Dependent Claim
22 words
The hose as set forth in claim 1, wherein said tubular resinous layer has a thickness ranging from 0.05 to 1.0 mm.
Claim 12
Dependent Claim
131 words
A refrigerant-transporting hose comprising: an elastic tube through which a refrigerant is transported, said elastic tube including a tubular resinous layer formed of a resinous composition, said resinous composition containing as a major component thereof a mixture of saponified ethylene-vinyl acetate copolymer and a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms, said elastic tube further including an outer rubber layer located radially outwardly of said tubular resinous layer; an outer tube of a rubber material located radially outwardly of said elastic tube; and a reinforcing fiber layer interposed between said outer rubber layer of said elastic tube, and said outer tube, such that said elastic tube, reinforcing fiber layer and outer tube constitute an integral tubular body.
Claim 13
Dependent Claim
131 words
A refrigerant-transporting hose comprising: an elastic tube through which a refrigerant is transported, said elastic tube including a tubular resinous layer formed of a resinous composition, said resinous composition containing as a major component thereof a mixture of saponified ethylene-vinyl acetate copolymer and a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid compound having from eight to sixteen carbon atoms, said elastic tube further including an outer rubber layer located radially outwardly of said tubular resinous layer; an outer tube of a rubber material located radially outwardly of said elastic tube; and a reinforcing fiber layer interposed between said outer rubber layer of said elastic tube, and said outer tube, such that said elastic tube, reinforcing fiber layer and outer tube constitute an integral tubular body.
Claim 14
Dependent Claim
16 words
The hose as set forth in claim 11, wherein said resinous composition consists of said mixture.
Claim 15
Dependent Claim
35 words
The hose as set forth in claim 11, wherein said resinous composition contains not more than 250 parts by weight of said saponified ethylene-vinyl acetate copolymer per 100 parts by weight of said polyamide resin.
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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) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |