Regenerative diatomaceous earth filter
US4944887A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Jan 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid filter is disclosed which includes a casing defining a fluid chamber with inlet and outlet apertures to and from the chamber to respectively conduct unfiltered fluid to the chamber and filtered fluid from the chamber. A flow path is defined within the chamber and a filter is interposed in the flow path substantially normal to the direction of flow of the fluid in the chamber. The filter includes a screen having a covering of a filter aid, such as diatomaceous earth, on an upstream side of the screen. The filter is regenerated by reciprocating the screen relative to the casing in a path corresponding to the path defined by the direction of flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.