Filter device
US7909990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2002 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Aug 21, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter device is made up of: a filter portion having a fluid outlet at its axis, and a fluid inlet in a position away from the axis, in which a fluid containing particles is supplied at a predetermined flow speed from the fluid inlet to cause a swirling, particles are moved outward in a centrifugal state and the fluid from which the particles are separated is discharged from the fluid outlet, and the particles separated by slowing down the swirling are allowed to sink; and a settlement portion in which the particles that settle in the filter portion are allowed to settle. Thus, a fluid containing particles is supplied at a predetermined flow speed to cause swirling, the particles are separated by a centrifugal force caused by the swirling and allowed to sink and settle, and the fluid from which the particles are separated is discharged. A large amount of particles can be allowed to settle and be reliably removed in a short time with this small-sized and simple device. The filter device does not clog, does not need washing and exchanging work and keeps the costs low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.