Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1994-06-06
1995-03-07
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
73 5418, 73 5415, G01N 1112, G01N 1114
Patent
active
053947398
ABSTRACT:
A viscosity tester includes a free standing magnetic object disposed in fluid in a stationary receptacle. A magnetic force drives the object in an orbit and the magnetic force, the speed of the object and the lag angle between the magnetic field and the object are either measured or controlled and, based on at least one of these three parameters, the viscosity of the fluid is determined. In one embodiment, a magnetic ball is driven by four electromagnets, with proximity sensors detecting the presence of the ball and controlling the electromagnets. In another embodiment, a free standing magnet is driven in an orbital pattern by a rotating field that is coaxial with the orbital pattern and is produced by a rotating magnet or a stator.
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Abnett Albert C.
Garvey, III Raymond E.
Piety Kenneth R.
Computational Systems Inc.
Wiggins J. David
Williams Hezron E.
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