Pressure sensor

Details Pressure sensor Pressure sensor

2007-10-09

2007-10-09

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Electrical

C361S283100

Reexamination Certificate

active

11406535

ABSTRACT:
A pressure sensor for sensing a pressure level of a medium. The pressure sensor includes a rigid substrate having a medium contacting side and a pressure sensitive resistor mounted on the medium contacting side. The resistor exhibits a change in resistance in response to pressure changes on the resistor above a predetermined threshold. Other embodiments of the invention are shown using a wheatstone bridge with pressure sensitive resistors and resistors that are insensitive to pressure changes.

REFERENCES:
patent: 4072058 (1978-02-01), Whitehead, Jr.
patent: 4321578 (1982-03-01), Nagasu et al.
patent: 4536820 (1985-08-01), Binder et al.
patent: 4542435 (1985-09-01), Freud et al.
patent: 4546653 (1985-10-01), Tobita et al.
patent: 6782755 (2004-08-01), Tai et al.
patent: 2004/0237285 (2004-12-01), Rangsten et al.

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