Method and apparatus for measuring the pressure of a liquid

Details Method and apparatus for measuring the pressure of a liquid Method and apparatus for measuring the pressure of a liquid

1984-01-23

1985-09-17

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Piston

73301, 73302, 73745, G01F 2318

Patent

active

045412855

ABSTRACT:
In a method and apparatus for measuring the pressure of a liquid in a closed storage tank, a measuring piston is guided in a cylinder and is acted upon on one side by a pressure dependent on the pressure to be measured, the piston being in communication with a load measuring device. In order to compensate for the pressure exerted by gas and/or vapor in the interior space of the tank, that side of the piston opposite to said one side is acted upon by this pressure. This is achieved by enclosing the cylinder and the piston in a container filled with a blocking gas, such as nitrogen. The pressure of the blocking gas in the container is controlled by a regulator operation of which is controlled by sensing means for sensing the gas and/or vapor pressure in the interior of the tank.

REFERENCES:
patent: 4259975 (1981-04-01), Kinsey, Jr. et al.
patent: 4332166 (1982-06-01), Lawford
patent: 4377809 (1983-03-01), Lawford
patent: 4491016 (1985-01-01), Haefner

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