Measuring and testing – Fluid pressure gauge – With protective separator
Patent
1979-02-27
1980-12-02
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
With protective separator
73744, G01L 716
Patent
active
042364124
ABSTRACT:
This invention provides a pressure transmitting and sealing apparatus between a high or low pressure fluid line and a gauge monitoring the pressure of the fluid in the line. This apparatus transmits pressure fluctuations between the measured fluid and a dissimilar fluid in the standing line connected to the measuring gauge. The invention is particularly applicable in instances where the ambient temperature is below the freezing point of the measured fluid and a non-freezing fluid is required in the standing line and gauge. The apparatus comprises an in-line piston and cylinder unit which transmits variations in the pressure in the measured line to the fluid in the standing line to the gauge, while maintaining separation of the two fluids and at the same time allowing the non-freezing fluid in the standing line to lubricate the piston and cylinder. In the event of a break in the standing line, the piston will prevent leakage from the measured fluid line.
REFERENCES:
patent: 1828093 (1931-10-01), Ailman
patent: 2481651 (1949-09-01), Fitzpatrick
patent: 3415123 (1968-12-01), Broughton
patent: 3521491 (1970-07-01), Limbach
patent: 4050312 (1977-09-01), Myrick
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