Piezoelectric transducer for the destruction of concretions within an animal body
US4858597A · kind A · utility
59Cited by
19References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A piezoelectric transducer in the form of a spheroidal cap comprises a mosaic of individual piezoceramic elements having a height of 3 to 10 mms and a lateral extension that does not substantially exceed the height there being gaps between the piezoceramic elements which are filled with an electrically insulating material having a modulus of elasticity which is smaller by at least one order of magnitude than that of the ceramic material, with the rise of the spheroidal cap amounting to at least 5 cms and the apex angle of the corresponding spherical sector amounting to at least 60.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.