Hub ring and supporting plate for a filter and methods for manufacturing these members
US5611925A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 22, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Mar 22, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12368
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a hub ring for a filter wherein a supporting member having a plurality of supporting portions is interposed between a pair of keep plates, a supporting plate for a filter wherein a plurality of wave portions extending substantially in the circumferential direction are arranged in the radial direction, and methods for manufacturing these members. The hub ring has a great opening ratio to achieve a low pressure loss property and causes substantially no residence of polymer, and the hub ring can be manufactured at a low cost. The supporting plate has high pressure resistance, low-pressure loss property, good directivity of polymer flow and excellent polymer mixing effect, and it is suitable for use as a retainer disposed inside of a filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.