Isolator apparatus

Details Isolator apparatus Isolator apparatus

1987-03-12

1989-01-17

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With protective separator

73715, 73716, 73717, G01L 708, G01L 900, G01L 1302

Patent

active

047980893

ABSTRACT:
An isolator apparatus for coupling pressure from a pressurized fluid carried in a conduit to a pressure sensor in a pressure transmitter having an isolation diaphragm, isolation fluid, and a pressure sealing ring for providing an annular seal around an active region of the isolation diaphragm. The isolator apparatus includes a rigid support for spacing the pressure sealing ring away from the active region which reduces pressure measurement errors related to temperature-induced isolation fluid expansion, such that the annular seal overhangs the isolation diaphragm's active region.

REFERENCES:
patent: 1924091 (1933-08-01), Eisenhour
patent: 2671833 (1954-03-01), Dunmyer et al.
patent: 2725749 (1955-12-01), Green
patent: 2989084 (1961-06-01), Jones
patent: 3618390 (1971-11-01), Frick
patent: 4370890 (1983-02-01), Frick

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