Process and device for turning in the membrane of a pressure filter for suspensions
US5139665A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/822
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressure filter for suspensions comprises a boiler-shaped outer jacket, a lid coaxially movable relative to the latter and closing the outer jacket, a filter element protruding from the lid and a reversible membrane arranged coaxially between the outer jacket and the filter element so as to turn out of the outer jacket when the filter is opened and to turn back into the outer jacket again when the filter is closed. When the filter is being closed, a negative pressure relative to ambient pressure is generated inside the membrane, and to prevent formation of a single fold protruding at the sides beyond the rim of the outer jacket, the membrane is deformed by external influences until a triple or multiple fold no longer protruding at the sides beyond the rim of the outer jacket forms in the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.