Ultra-precision micro-differential pressure measuring device...

Details Ultra-precision micro-differential pressure measuring device... Ultra-precision micro-differential pressure measuring device...

2007-03-06

2007-03-06

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Bourdon

C073S716000

Reexamination Certificate

active

10546159

ABSTRACT:
The ultra-precision micro-differential pressure measuring device comprises a device body1having an inner space part therein, a pressure receiving plate3which is installed inside the inner space of the device body1and divides the said inner space hermetically into a lower space7and an upper part space8,an electronic weighing and pressure converting device2which is installed in the lower space7,and supports and secures the pressure receiving plate3,and a liquid sealing part R which liquid-seals the outer peripheral part of the aforementioned pressure receiving plate3and maintains the air-tightness between the lower space7and the upper space8.A micro-differential pressure between a pressure P1inside the upper space8and a pressure P2inside the lower space7is measured by the electronic weighing and pressure converting device2through the pressure receiving plate3.

REFERENCES:
patent: 1409182 (2003-04-01), None
patent: 57-35743 (1982-02-01), None
patent: 02-52975 (1990-02-01), None
patent: 6-76937 (1994-09-01), None
patent: 2004226377 (2004-08-01), None

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