Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Reexamination Certificate
2010-04-06
2011-12-27
Noori, Max (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
C073S760000
Reexamination Certificate
active
08082800
ABSTRACT:
A contactless SAW based torque and temperature sensor comprising a first (2) and second (3) SAW resonator provided on a substrate made of Y+34° cut of quartz. The first SAW resonator (2) has its principle axis inclined at +45° to the X-axis of the substrate, which, in use is either aligned with the longitudinal axis of the device who torque is to be measured or is perpendicular thereto, and the second SAW (3) has its principle axis inclined at −45° to the X-axis of the substrate. A third SAW (4) has its principle axis inclined at an angle of 30 degrees to the X-axis of the substrate. Each said SAW resonator (2,3,4) is formed by laying a film of aluminum on the substrate having a thickness (h) and the SAW resonators have an average operating wavelength λ where the ratio h/λ is in the range 0.021 to 0.032.
REFERENCES:
patent: 7165455 (2007-01-01), Magee et al.
patent: 7795779 (2010-09-01), Kalinin
patent: 2003/0000309 (2003-01-01), Lonsdale et al.
patent: 2009/0314104 (2009-12-01), Lohr et al.
patent: 2426336 (2006-11-01), None
Keusey & Associates, P.C.
Noori Max
Transence Technologies Plc
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