US4800109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible composite hose
Assignee: Usui Kokusai Sangyo Kaisha Ltd
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Filing: 1987-02-02
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Granted: 1989-01-24
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Expires: 2007-02-02
Abstract
Abstract There is provided a flexible composite hose constructed such that a plastics inner tube is covered with an outer tube of heat-shrinkable material, with the inner tube being compressed by the shrinkage force of the outer tube. It is produced by covering an inner tube with an outer tube having a slightly larger inside diameter than the outside diameter of the inner tube, and then heating the tube assembly at a proper temperature to effect heat shrinkage. It has good chemical resistance and pressure resistance.
Inventors
- 👤 Katsushi Washizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L2011/047; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/3175
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A flexible composite hose having high oil resistance, chemical resistance and pressure resistance which consists essentially of an inner tube that consists of a synthetic polyamide and an outer external tube of heat-shrunk material which consists of a fluoroplastic or chloroprene rubber, said inner tube being compressed by the shrinkage force of said outer external tube.
Claim 2
Dependent Claim
56 words
A flexible composite hose having high oil resistance, chemical resistance and pressure resistance which consists essentially of an inner tube that consists of a synthetic polyamide and an outer external tube of heat-shrunk material which consists of a fluoroplastic or chloroprene rubber, said inner tube being compressed by the shrinkage force of said outer external tube.
Claim 3
Dependent Claim
21 words
A flexible composite hose as defined in claim 1, wherein the outer external tube is made of polytetrafluoroethylene having perfluoroalkoxy groups.
Claim 4
Dependent Claim
18 words
A flexible composite hose as defined in claim 1, wherein the outer external tube is of chloroprene rubber.
References Cited (Backward Citations)
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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) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |