Method for treating and sealing piezoelectric tuning forks
US8878548B2 · kind B2 · utility
1Cited by
42References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2011 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Apr 28, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an apparatus for estimating a property of a fluid. The apparatus includes: a piezoelectric resonator configured to be disposed in the fluid; an electrode embedded in the piezoelectric resonator and included in a resonator circuit configured to output an electrical signal related to the property; a discontinuity defined by a surface of the piezoelectric resonator, the discontinuity altering an impedance of the resonator circuit if a high-dielectric fluid or a conductive fluid is disposed in the discontinuity; and an insulating material disposed in the discontinuity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.