Flexible tube, and method for manufacturing same
US6565507B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/007
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A flexible tube having a laminated multi-layer structure including an outer layer composed of a main tube body layer formed of thermoplastic synthetic resin in a predetermined thickness and a reinforcing layer provided on the inner side of the main tube body layer, and an inner layer formed of a thin film sheet of air tight and low friction material. The inner layer is formed by rolling an elongated strip of a thin film sheet into a tubular form such that opposite lateral sides of the thin film sheet are overlapped one on the other to provide a thick wall portion extending longitudinally of and at one angular position of the inner layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.