Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Reexamination Certificate
2006-12-12
2006-12-12
Noori, Max (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
Reexamination Certificate
active
07146862
ABSTRACT:
A strain gage sensor having improved operational aspects and lower production costs. The strain gage sensor includes two active resistors, two passive resistors, and a structure for minimizing strain experienced by the two passive resistors. The active and passive resistors are attached in a Wheatstone bridge configuration and are Piezoresistors. The active resistors and the strain minimizing structures are mounted on the backing plate. The backing plate or the strain minimizing structure includes alumina ceramic substrate. A voltage to current converter circuit is attached to the active and passive resistors and mounted to the backing plate. Multiple Wheatstone bridge circuits or multiple Wheatstone bridge circuits with voltage to current converter circuits are manufactured on a single backing plate and separated prior to use.
REFERENCES:
patent: 3841150 (1974-10-01), Pearson
patent: 5410908 (1995-05-01), Erichsen
patent: 2002/0032403 (2002-03-01), Savagle et al.
patent: 2004/0069067 (2004-04-01), Mancinone et al.
Kosht Danial L.
Oboodi Reza
Piascik James
Walling Joseph M.
Black Lowe & Graham PL
Noori Max
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