US4219522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing reinforced plastic hoses
Assignee: Bridgestone Corp
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Filing: 1978-12-19
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Granted: 1980-08-26
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Expires: 1998-12-19
Abstract
Abstract A method of manufacturing reinforced plastic hoses comprising extruding and shaping plastic material into a plastic tube which is provided around its outer surface with a serrated portion, heating said plastic tube so as to soften said serrated portion, and covering the outer surface of said plastic tube with a reinforcing layer.
Inventors
- 👤 Hiroichi Oyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:47
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29C48/03; B29C48/09; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
A method of manufacturing reinforced plastic hoses comprising the steps of: extruding and shaping plastic material into a plastic tube having a smooth inner surface and a longitudinally serrated outer surface comprising alternating raised ridges and recessed grooves, locally heating said plastic tube to soften only the ridges of the serrated outer surface while leaving the main body of said tube in a hardened state, applying a tensioned wire reinforcing layer to the softened outer surface of the tube, and embedding said tensioned wire reinforcing layer into the ridges of said softened outer surface.
Claim 2
Independent Claim
94 words
A method of manufacturing reinforced plastic hoses comprising the steps of: extruding and shaping plastic material into a plastic tube having a smooth inner surface and a longitudinally serrated outer surface comprising alternating raised ridges and recessed grooves, locally heating said plastic tube to soften only the ridges of the serrated outer surface while leaving the main body of said tube in a hardened state, applying a tensioned wire reinforcing layer to the softened outer surface of the tube, and embedding said tensioned wire reinforcing layer into the ridges of said softened outer surface.
Claim 3
Dependent Claim
35 words
The method according to claim 1, comprising further heating said reinforcing layer, and extruding an outer layer formed of plastic material which is the same as said tube plastic material to cover said reinforcing layer.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |