Method of and apparatus for measuring rheological characteristics of substances
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United States of America Patent
Stats
-
Feb 23, 1988
Grant Date -
N/A
app pub date -
Dec 1, 1986
filing date -
Dec 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The viscometer comprises a measuring element suspended on a torsion wire and immersed in a substance to be tested contained in a measurement vessel. The measurement vessel with the therein contained substance is driven by a first drive member. A second drive member as well as a measuring system are arranged on a shaft between the torsion wire and the measuring element. A signal transducer prescribes or sets a predetermined amount of torque for the second drive member. The predetermined amount of torque corresponds to a predetermined shear stress characteristic of the substance to be measured. A predetermined angular deflection or angular velocity is applied to the first drive member through a regulation connection arranged between the measuring system and the first drive member. The viscometer is, due to its high accuracy, particularly advantageous for applications in low viscosity ranges of structurally viscous substances.
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