Piezoelectric transducers and acoustic antennas which can be immersed to a great depth
US4151437A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Jul 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0618
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Piezoelectric transducers and antennas comprising a plurality of identical transducers arranged coaxially, each transducer comprising a ring and a plurality of piezoelectric motor elements arranged radially against the inner wall of the ring. The rings form an envelope which is closed by two covers and the envelope encloses an axial cylindrical channel containing a piston. The inside of the envelope contains a solid material which is elastomeric or rigid and is separated from the inner walls of the envelope by a small clearance which communicates with the end of the cylinder. An application is the construction of acoustic antennas intended to be immersed to great depths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.