Method for positioning small particles in a fluid
US7601267B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 25, 2003 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Dec 11, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/283
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention covers the field of positioning of small particles (58, 59) in a fluid (55). Disclosed is a method by which small particles (58, 59) are positioned by a sound field. For generating the sound field an apparatus contains a plate (51) excited to vibrations by a transducer (52) and a reflecting body with a rigid surface (54). A mounting (53) holds the vibrating plate (51) and the transducer (52). The particles will be concentrated at predetermined positions either at the rigid surface of the reflecting body (58) or levitating in the fluid (59). Due to the fact that the sound waves are emitted by the vibrating plate particles can be positioned in entire area between the vibrating plate and the reflecting body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.