Filtration device
US7976704B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2009 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | May 15, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C2201/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filtration device is provided with a filter tank, filter media unit, and magnet. The filter media unit includes a filter media accommodation case and a large number of magnetic granular filter media. The magnet is movable between first and second positions. In the first position, a magnetic field is applied to the magnetic granular filter media, so that the magnetic granular filter media magnetically attract one another. In the second position, magnetic attraction between the magnetic granular filter media is canceled. The filter media accommodation case includes a nonmagnetic mesh member of a nonmagnetic material and magnetism intensification plate of a magnetic material. When the magnet is in the first position, the magnetic granular filter media and nonmagnetic mesh member are located between the magnetism intensification plate and the magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.