Plastic tube with longitudinal channels in the wall
US4440195A · kind A · utility
21Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/60
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Tube of thermoplastic material, comprising longitudinal channels of rounded cross section and having such wall stresses that, after axially cutting the tube, the edge parts beside the cut edges overlap each other for less than 5% of the outer circumference of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.