Pressure sensor with laminated membrane

Details Pressure sensor with laminated membrane Pressure sensor with laminated membrane

2006-08-15

2006-08-15

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Tire, tread or roadway

C073S716000, C073S736000

Reexamination Certificate

active

07089790

ABSTRACT:
A pressure sensor (30) for sensing a fluid pressure in harsh environments such as the air pressure in a tire, by using a chamber (58) partially defined by a flexible membrane (50), the flexible membrane (50) is a laminate having at least two layers wherein at least one of the layers is at least partially formed from conductive material, and the chamber (58) containing a fluid at a reference pressure, such that the flexible membrane (50) deflects from any pressure difference between the reference pressure and the fluid pressure; and,associated circuitry (34) for converting deflection of the flexible membrane (50) into an output signal indicative of the fluid pressure.Forming the membrane from a number of separately deposited layers alleviates internal stress in the membrane (50). The layers can be different materials specifically selected to withstand harsh environments.

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