Acoustic tweezers
US11534761B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Jan 5, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2400/0436
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Electroacoustic device that includes a body, an electrode to be electrically powered, named hot electrode, and an electrode to be electrically grounded, named ground electrode. The body includes a piezoelectric part or the electroacoustic device further including a piezoelectric part different from the body. The hot electrode includes a hot track spiraling around a spiral axis. The radial step between two consecutive coils of the hot track decreasing radially from the spiral axis. The hot electrode and the ground electrode are arranged on the piezoelectric part such as to define a wave transducer configured to generate a focalised ultrasonic vortex propagating in the body and/or, when a fluid medium is acoustically coupled with the electroacoustic device, in the fluid medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.