Dampened ultrasonic transducer
US4417480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Jun 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved dampened ultrasonic transducer for imparting sonic energy to or receiving sonic energy from fluid, having a housing with a cylindrical cavity therein providing a closed end wall at one end and an opening in the opposite end, the housing having internal threads adjacent the opening. A piezoelectric crystal is positioned within the housing, the front face being contiguous to the cavity closed end wall, a cylindrical dampening member positioned within the cavity with the front face contiguous to the crystal rear face, a plurality of spring washers, the forwardmost washer engaging the rearward face of the dampener member, and an externally threaded plug member positioned in the rearward end of the housing and threadably advanced to apply compressive resilient force against the dampening member to maintain firm contact of the dampening member with the crystal and the crystal with the housing closed end wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.