Differential fluid pressure measurement apparatus

Details Differential fluid pressure measurement apparatus Differential fluid pressure measurement apparatus

2008-02-11

2009-08-25

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S736000

Reexamination Certificate

active

07578194

ABSTRACT:
A differential liquid pressure sensor (10) has an upper housing (12) that mounts a connector portion (12a) and receives in a recess a sense element module (14). The sense element module is a body in which a generally U-shaped oil filled passageway (14h) is formed with openings at opposite ends provided on respective first and second diaphragm mounting surfaces. A fluid pressure sense element, such as a piezoresistive sense element (15) is disposed in one of the passageway openings and flexible metal diaphragms (14a,14b) are mounted on the respective diaphragm mounting surfaces of the module facing a common direction. A lower housing (18) having first and second port connections for the respective diaphragms is disposed on the lower surface of the module.

REFERENCES:
patent: 3492872 (1970-02-01), Ziegler et al.
patent: 3901082 (1975-08-01), Lyon
patent: 4909083 (1990-03-01), Fazeli et al.
patent: 6813953 (2004-11-01), Baba et al.
patent: 7197936 (2007-04-01), Baba
patent: 7464599 (2008-12-01), Silverbrook et al.
patent: 2003/0200813 (2003-10-01), Baba et al.

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