Fluidic oil viscometer

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity

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137804, G01N 1104, G01N 3330

Patent

active

042779715

ABSTRACT:
A fluidic oil viscometer for determining the degradation of machinery lubating oils compares the viscosity of the machinery oil with the viscosity of another fluid, such as air. Both the viscosity of the air and the viscosity of the oil are sensed, using capillary-orifice combination sensors, and the air viscosity reading is amplified using a series of laminar proportional amplifiers to equalize its change in viscosity with that of oil. The outputs of the capillary orifice combination sensors are applied to two different pressure gauges, the difference between these two pressure gauges represents the viscosity breakdown. This difference will be independent of temperature.

REFERENCES:
patent: 3616809 (1971-11-01), Laakaniemi et al.
patent: 3678733 (1972-07-01), Blatter
patent: 3744315 (1973-07-01), Hirs
patent: 3952576 (1976-04-01), Drzewiecki
patent: 4120322 (1978-10-01), Bowles

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