Fluid pressure measuring device with pressure attenuation

Details Fluid pressure measuring device with pressure attenuation Fluid pressure measuring device with pressure attenuation

1988-04-18

1989-12-05

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With protective separator

73727, 338 4, G01L 708, G01L 906

Patent

active

048844519

ABSTRACT:
The invention relates to a device for measuring pressures in a hydraulic or pneumatic system comprising preferably a piezoresistive pressure measuring cell disposed within the pressure housing in a pressure chamber filled with a separating fluid and separated from the medium to be measured by means of a diaphragm. In the pressure housing on the pressure input side before the pressure measuring cell or the sensor element (10.0), at least one pressure attenuation element (3.0;4.0;5.0) transferring the pressure is arranged before and/or behind the separating diaphragm (2.0). In an embodiment, a pressure attenuation element (3.0 or 5.0, resp.) is arranged on the pressure input side behind the diaphragm being provided with an elastic protective layer (2.1) turned toward the pressure attenuation element. The pressure attenuation element (3.0;4.0;5.0) consists of a microporous sintered metal, e.g. of a microporous non-iron material, a microporous ceramic material, or a stainless-steel plate with at least one passing-through microbore having a borehole diameter of equal to or less than 0.5 mm.

REFERENCES:
patent: 3422679 (1969-01-01), McGowan et al.
patent: 4077261 (1978-03-01), Ring et al.
patent: 4668889 (1987-05-01), Adams

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