Device for transmitting acoustic waves through a liquid medium
US4139835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1977 |
| Grant date | Feb 13, 1979 |
| Priority date | — |
| Expiry date | Mar 22, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/135
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for transmitting acoustic waves through a liquid medium in which it is submerged comprising two movable assemblies including respectively members provided with first contact walls and delimiting with a sealing membrane a water tight enclosure, and members provided with second contact walls which are the armatures of an electro-magnet, the respective members being so arranged that when the first contact walls are in contact, the second contact walls are spaced apart and conversely, pressure actuated means for moving the first contact walls apart from each other and releasable locking means including an energizing coil for maintaining the armatures of the electro-magnet in spaced apart relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.