US6009910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant transporting hose
Assignee: Yokohama Rubber Co Ltd
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Filing: 1998-06-29
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Granted: 2000-01-04
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Expires: 2018-06-29
Abstract
Abstract Refrigerant transporting hose comprising an inner tube formed of a rubber composition based on an isobutylene.p-methylstyrene copolymer in which part or all of the p-methylstyrene units are brominated, and an outer tube around the inner tube with a reinforcing layer interposed, is improved not only in softness and resistance to the permeation of refrigerants but also in vibration and sound absorbing characteristics.
Inventors
- 👤 Hiroaki Shibano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:33
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A refrigerant transporting hose comprising an inner tube and an outer tube around it with a reinforcing laver interposed, said inner tube being formed of a rubber composition based on an isobutylene.p-methylstyrene copolymer in which part or all of the p-methylstyrene units are brominated, wherein said isobutylene.p-methylstyrene copolymer is comprised of a copolymer having a recurring unit structure (A) that is derived from isobutylene and represented by the formula (a) set forth below, a recurring unit structure (B) that is derived from p-methylstyrene and represented by the formula (b) set forth below, and a recurring unit structure (C) that has the methyl group in the recurring unit (B) brominated and which is represented by the formula (c) set forth below: ##STR2##
Claim 2
Dependent Claim
121 words
A refrigerant transporting hose comprising an inner tube and an outer tube around it with a reinforcing laver interposed, said inner tube being formed of a rubber composition based on an isobutylene.p-methylstyrene copolymer in which part or all of the p-methylstyrene units are brominated, wherein said isobutylene.p-methylstyrene copolymer is comprised of a copolymer having a recurring unit structure (A) that is derived from isobutylene and represented by the formula (a) set forth below, a recurring unit structure (B) that is derived from p-methylstyrene and represented by the formula (b) set forth below, and a recurring unit structure (C) that has the methyl group in the recurring unit (B) brominated and which is represented by the formula (c) set forth below: ##STR2##
Claim 3
Dependent Claim
24 words
The refrigerant transporting hose according to claim 1, wherein said outer tube is made of an ethylene.propylene copolymer rubber or a halogenated butyl rubber.
Claim 4
Dependent Claim
25 words
The refrigerant transporting hose according to claim 1, wherein the content of the recurring unit structure (A) in said isobutylene.p-methylstyrene copolymer is 73-96 wt %.
Claim 5
Dependent Claim
25 words
The refrigerant transporting hose according to claim 1, wherein the content of the recurring unit structure (B) in said isobutylene.p-methylstyrene copolymer is 3-20 wt %.
Claim 6
Dependent Claim
25 words
The refrigerant transporting hose according to claim 1, wherein the content of the recurring unit structure (C) in said isobutylene.p-methylstyrene copolymer is 1.2-7.4 wt %.
Claim 7
Dependent Claim
20 words
The refrigerant transporting hose according to claim 1, wherein the bromine content of said isobutylene.p-methylstyrene copolymer is 0.5-3.0 wt %.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-03 | 2003-07-05 | 2004-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-03 | 2007-07-05 | 2008-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-03 | 2011-07-05 | 2012-01-04 | $7700.00 | Window Closed / Lapsed |