Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2011-05-17
2011-05-17
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S061750
Reexamination Certificate
active
07942056
ABSTRACT:
A piezoelectric cantilever sensor includes a piezoelectric layer and a non-piezoelectric layer, a portion of which is attached to the piezoelectric layer. In one embodiment, one end of the non-piezoelectric layer extends beyond the end of piezoelectric layer to provide an overhang. The overhang piezoelectric cantilever sensor enables increased sensitivity allowing application of the device in more viscous environments, such as liquid media, as well as application in liquid media at higher flow rates than conventional piezoelectric cantilevers. In another embodiment, the sensor includes first and second bases and at least one of the piezoelectric layer and the non-piezoelectric layer is affixed to each of the first and second bases to form the piezoelectric cantilever sensor. In this embodiment, the sensor is robust and exhibits excellent sensing characteristics in both gaseous and liquid media, even when subjected to relatively high flow rates.
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Campbell Gossett Augustus
Maraldo David
Mutharasan Rajakkannu
Rijal Kishan
Drexel University
Shah Samir M
Williams Hezron
Woodcock & Washburn LLP
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