Ultrasonic transducer
US7548014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Apr 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2015/938
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic transducer includes a cylindrical cap member having a bottom. A piezoelectric element is bonded to the inner side of a bottom portion of the cap member using a conductive adhesive or other suitable adhesive. An inner frame made of a material having an acoustic impedance greater than that of the cap member is fitted into the cap member so as to be in contact with a side portion, including the end portion, of the cap member. Through-holes are provided in the side portion of the inner frame. Lead wires are connected to the piezoelectric element and the inner frame, respectively. A sound absorber and a damper are inserted into the inner frame. The damper is in direct contact with the side portion of the cap member via the through-holes of the inner frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.