Prestressed annular acoustic transducer
US6065349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1997 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Jun 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0655
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to annular acoustic transducers formed by a set of piezoelectric segments placed under prestress. It consists in grouping these segments (101) into a set of sectors (102) which are separated by tightening wedges (109). The set is placed in a shaper annulus (108). The keys are drawn towards the center by screws (111), thus thrusting the sectors against the shaper annulus and prestressing the segments. The strain gauges (107) make it possible to check the stress obtained in order to adjust it to the desired value while minimizing the scatter between the sectors. It makes it possible to manufacture dismantleable low-frequency high-power acoustic transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.