Multi-frequency ultrasonic transducer
US4490640A · kind A · utility
8Cited by
5References
6Claims
0Family size
Inventor
Key dates
| Filing date | Sep 22, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Sep 22, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0614
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrasonic transducer consisting of three piezoelectric element couples sandwiched between four metal terminals. Each piezoelectric couple has two piezoelectric elements separated by an electrode. The piezoelectric couples and the metal terminals are secured together by a bolt. The transducer exhibits various combinations of resonant frequencies in its impedance-frequency characteristic as determined between various combinations of the electrodes and terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.