Filter apparatus
US5217613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Dec 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/76
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter apparatus includes a mesh filter consisting of a flexible sheet having a smooth surface and a multiplicity of through-holes and formed into a cylindrical configuration. The leading edge of a scraper is brought into abutting contact with the outer surface of the cylindrically formed mesh filter, or two scrapers can be provided on the inner and outer surfaces of the mesh filter with their leading edges abutted against these surfaces. Provided within the mesh filter is a support shaft serving also as a discharge pipe. The discharge pipe discharges clean oil filtered by the mesh filter, and the support shaft rotatably supports the mesh filter. The cylindrical mesh filter is disposed in a tank for accommodating cutting oil or abrasive oil containing solid foreign matter such as cutting chips or abrasive grains. The mesh filter is rotated on the discharge pipe/support shaft by a drive mechanism. The oil containing the solid foreign matter is passed through the cylindrical mesh filter from the outer to the inner side thereof so that the foreign matter in the oil is trapped by the through-holes. The foreign matter thus trapped is scraped off the mesh filter by the scraper or scrap…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.