Helical coil filter element
US4783259A · kind A · utility
Inventor
Key dates
| Filing date | Jul 7, 1986 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jul 7, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid filter having a deformable filter body containing a myriad of filter passageways which may be enlarged to clean the filter by deforming the body. The presently preferred filter embodiment has a fluid permeable filter mass comprising a compact mass of pliant filter elements, such as pliant strands or strips, extending radially outward from the turns of an elastically deformable helix which has a normal axially contracted configuration wherein the helix forms an outlet passage extending longitudinally through the helix and communicating with a myriad of filter passageways extending through the filter mass and which helix is axially stretchable to enlarge the filter passageways for cleaning. A filter assembly including a filter tank containing the deformable fluid filter and having a removable cover for accessing the filter for cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.