Acoustic wave transducer with automatic compensation of the static pressure variations
US4074224A · kind A · utility
7Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Oct 18, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0666
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Acoustic wave transducer comprising a sensitive element subjected on one face to the pressure variations of an external medium and on the other face to the pressure prevailing in an inner cavity of the body of the transducer, associated with automatic regulation means whereby said cavity communicates either with the external medium or with a source of fluid at a pressure exceeding that of the external medium, depending on the pressure level in said cavity as compared to that of the external medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.