Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1997-01-02
1998-05-19
Oen, William L.
Measuring and testing
Fluid pressure gauge
Diaphragm
G01L 708
Patent
active
057538212
ABSTRACT:
A pressure gauge structure that consists of a gauge frame with a graduated gauge face at the top of a lower base at the bottom. Protruding from the circumference of the lower base is an annular seat and a guide pipe that provides for gaseous flow. A diaphragm is positioned on the lower base and on the diaphragm is a coil spring topped by a shaft sleeve for a pivoting needle shaft in the tube mount protruding from the gauge face, with the needle shaft o the gauge meter positioned in a coil spring. A calibration rod extends laterally from the needle shaft, the upper end of which is secured in a pivotal state to the gauge face by a mounting base. Around the needle shaft is a spiral spring, one end mounted to the gauge frame and the other end attached to the needle shaft. Under the gauge frame is a hoop flange and the lower base has a guide pipe for gaseous flow. The diaphragm is constructed out of metal with corrugations formed on the surface. The annular seat, ring-shaped gasket and diaphragm are clamped together in the hoop flange, to form a sealed air chamber in between the diaphragm and the lower base that only allows for external access through the guide pipe.
REFERENCES:
patent: 1409028 (1922-03-01), Richter
patent: 4040298 (1977-08-01), Lee et al.
patent: 4685336 (1987-08-01), Lee
Chin Ray Industrial Co., Ltd.
Oen William L.
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