Piezoelectric transducer
US5142511A · kind A · utility
91Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 3, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0625
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A piezoelectric transducer having electrodes formed on both surfaces has a piezoelectric base molded as a curved plate which can converge sound fields of acoustic waves at an arbitrary point and which can reduce noise or reverberation in a lateral direction which otherwise occur due to unnecessary vibration. At least one of the electrodes is divided concentrically. A material having a small electromechanical coupling factor K.sub.p in the lateral direction is used for the piezoelectric material, preferably porous PZT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.