Piezoelectrically driven ultrasonic transducer
US4173725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1978 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | Mar 7, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0618
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrasonic transducer comprising a first cylindrical member which includes a mechanical vibration amplifying part formed in symmetry around the axis thereof and having a gradually increased cross-sectional area toward a base portion thereof, the base portion having a flat surface perpendicular to the axis thereof, and an annular rigid part formed with the mechanical vibration amplifying part coaxially therewith, the annular rigid part being extended from the outer wall of the base portion axially and radially outwardly to have sufficient rigidity and weight, and the annular rigid part being provided, in the proximity of the outer wall of the base portion, with an annular groove or gap having a predetermined axial depth in order to reduce the diameter of the flat surface. The transducer further comprises a second cylindrical member which includes a backing block of a cylindrical body, a base portion of which is formed with a flange and a flat surface perpendicular to the axis thereof having the larger diameter than that of the flat surface of the first cylindrical member. An ultrasonic transducer portion is interposed between the flat surfaces of the first and second cylindrical …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.