G - Physics
01
F
73/15
G01F 1/38 (2006.01) G01F 1/26 (2006.01)
Patent
CA 1040884
ABSTRACT OF THE DISCLOSURE A flow meter is described which provides a linear read- out signal proportional to flow therethrough and which can compen- sate for changes in the viscosity of the fluid. The flow meter is designed for in-line installation. The working element consists of two spring-restrained pistons mounted on a common stem. One of the pistons moves axially inside a contoured cylinder providing a nonlinear area-displacement characteristic. The cylinder con- tour, and the nonlinear area displacement characteristic thereof, is designed to produce a linear relationship between the piston displacement and fluid flow rate. The second piston provides the viscosity-compensating correction force to give an accurate flow indication in the presence of changes in fluid viscosity. The stem upon which the pistons are mounted extends into a calibrated read- out scale to provide an indication of flow rate as a function of piston displacement.
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