Method and apparatus for measuring the rheological characteristi

Details Method and apparatus for measuring the rheological characteristi Method and apparatus for measuring the rheological characteristi

1985-10-22

1987-02-17

Levy, Stewart J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

G01N 1116

Patent

active

046430210

ABSTRACT:
The invention relates to a method and to a device for measuring, e.g. the viscosity of a fluid, by means of a rotating cylinder immersed in the fluid and on the basis of a torque applied to the cylinder and the cylinder's speed of rotation. The rotary cylinder (50) is completely immersed in the fluid contained in a tube (40) which is itself placed inside a constant temperature jacket (38) and is rotated by a rotating electromagnetic field produced by an induction winding (64) coaxially surrounding the tube and the cylinder and powered with alternating current at an adjustable predetermined intensity. The invention is applicable to measuring the viscosity of biological fluids, such as blood.

REFERENCES:
patent: 2603087 (1952-07-01), Von Hortenau
patent: 3053078 (1962-09-01), Jewett
patent: 4152927 (1979-05-01), Feng et al.
patent: 4299119 (1981-11-01), Fitzgerald et al.
patent: 4499753 (1985-02-01), Carr
Hodgins, M. G. et al, Magnetic Densimeter-Viscometer, in Rev. Sci. Instr., vol. 42 (10), pp. 1455-1457, Oct. 1971.

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