Ultrasonic transducer
US4705981A · kind A · utility
20Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1987 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Jan 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K9/122
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ultrasonic transducer comprises a diaphragm formed by a metal plate provided with a bulged portion in its center and a piezoelectric element bonded to the inner surface of the bulged portion thereby to make the diaphragm vibrate in a bending mode. A node line is present outside the bulged portion in vibration of the diaphragm, and the diaphragm is sandwiched by first and second elastic members along the node line. The first and second elastic members are held between a case and a base fixed thereto so that the diaphragm is elastically retained through the first and second elastic members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.