Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1995-05-24
1997-03-25
Chilcot, Richard
Measuring and testing
Fluid pressure gauge
Diaphragm
73723, G01L 708, G01L 900
Patent
active
056146779
ABSTRACT:
Apparatus for measuring the pressure of a fluid includes a first pressure transmission element in form of a membrane in contact with a pressure sensor, and a second pressure transmission element in form of a membrane which is acted upon by a fluid whose pressure is to be determined. The first membrane has a peripheral area which is pressed against the second membrane in such a manner that the space between the first and second membranes is sealed off from outside and is of a size as small as possible. Both membranes thus move in synchronism in dependence of the fluid pressure so that positive as well as negative pressures can be measured.
REFERENCES:
patent: 4185641 (1980-01-01), Minior et al.
patent: 4541282 (1985-09-01), Auerweck et al.
patent: 4856340 (1989-08-01), Garrison
patent: 4885983 (1989-12-01), Zavoda
Christmann-Braun Horst
Pieper Walter
Wamsiedler Ralf
Wojke Ralf
Chilcot Richard
Feiereisen Henry M.
Fresenius AG
Oen William L.
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