Viscoelastometer

Details Viscoelastometer Viscoelastometer

1981-10-06

1984-03-20

Goldberg, Gerald

Measuring and testing

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

Viscosity

73 644, 73169, G01N 1110, G01N 1302

Patent

active

044373376

ABSTRACT:
A viscoelastometer for measuring and displaying a viscoelastic effect in a liquid such as water, oils, paints, blood or thickened liquids or suspensions including types commonly used as foods or pharmaceuticals as a reproducible force time signature. The viscoelastometer comprises a rigid member suspended from the free end of a resilient, deflectable cantilever which extends from a rigid support, a liquid sample cup associated with a pneumatic cylinder for moving the sample cup at a selected rate between an upper position at which the rigid member is immersed to a predetermined depth in the liquid and a lower position at or before which occurs relaxation and separation of a filament of the liquid which forms between the rigid member and the surface of the liquid during downward movement of the sample cup, strain gauges associated with a portion of the cantilever intermediate the rigid member and the rigid support, and a display associated with the strain guages to display a quantitatively reproducible force time signature representative of the viscosity and elasticity of the liquid as a function of the sensed strain imparted to the cantilever as the sample cup is moved between the upper and lower positions.

REFERENCES:
patent: 1960224 (1934-05-01), Schoenberg
patent: 3043131 (1962-07-01), Heneage
patent: 3415109 (1968-12-01), Sucker et al.
patent: 3463014 (1969-08-01), Katz et al.
patent: 3780569 (1973-12-01), Graham
Rosano, H. L. et al., Determination of the Critical Surface Tension Using an Automatic Wetting Balance, In Journ. of Coll. and Interface Sci., 36(3): pp. 298-307, Jul. 1971.
Kee, D. et al., New Method for the Determination of Yield Stress, In Journ. of Text. Stud. 10, pp. 281-288, Sep. 17, 1979.

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