Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1997-02-28
1998-07-07
Brock, Michael
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
73 5435, G01N 1114
Patent
active
057772126
ABSTRACT:
A rotary viscometer has a control mode for measuring the viscosity of a liquid sample with a high viscosity or a high yield value in an ultra-low shear rate range using a spring relaxation method. In this rotary viscometer, a pivot protecting device attains a locked state in which a pivot is separated from a bearing and a rotor shaft is locked against the rotation therein, a released state in which the lock of the rotor shaft is released while the pivot is in contact with the bearing, and a latched state disposed therebetween, in which the rotation of the rotor shaft is locked and the pivot is in contact with the bearing. Responding to user's instructions, a control device controls a locking motor to bring the pivot protecting device to a designated state, and controls a rotational driving motor in accordance with the state. For the spring relaxation measurement, the control device controls so that the spring is wound up while the pivot protecting device is in the latched state.
REFERENCES:
patent: 5201214 (1993-04-01), Sekiguchi et al.
patent: 5287732 (1994-02-01), Sekiguchi
Sadayoshi Hattori
Sekiguchi Koji
Brock Michael
Toki Sangyo Co., Ltd.
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