Apparatus for producing a helical tube
US4929167A · kind A · utility
14Cited by
22References
11Claims
0Family size
Inventor
Key dates
| Filing date | Jul 11, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Jul 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/40
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for producing a curved tube, the apparatus comprising an extruder for extruding a tube having a wall including a first portion having a thickness, and a second portion diametrically opposite the first portion and having a thickness less than the thickness of the first portion, and rollers for forming the tube into a curve with the first portion being radially outward and with the second portion being radially inward so that the thickness of the first portion becomes substantially equal to the thickness of the second portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.