Acoustic transducer
US4794295A · kind A · utility
19Cited by
10References
25Claims
0Family size
Inventors
Key dates
| Filing date | Dec 5, 1986 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Dec 5, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure sensing transducer comprises a central region which comprises a potting material and which is surrounded by a helix of piezo electric coaxial cable. The transducer includes a barrier that suppresses transmission of external pressure variations to the central region. In addition, the overall radial stiffness of the potting material and barrier is sufficiently low that the electrical signal generated by the coaxial cable have a d.sub.31 polarity (corresponding to axial stretching and contracting of the cable).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.