Tubular membrane with a helical ridge, as well as a method and apparatus for producing such a tubular membrane
US11179679B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2019 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Sep 3, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A tubular membrane comprises a support tube made out of one or more flexible tapes of porous support material which have been helically wound into a tube shape with overlapping tape edges which have been sealed to each other, and a semi-permeable membrane layer made of membrane forming material on an inner wall of the support tube. At least one inwardly projecting helical ridge is provided on said inner wall of the support tube, which helical ridge is covered with or forms part of the membrane layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.