Title:
VISCOMETERS
Document Type and Number:
WIPO Patent Application WO2003098195
Kind Code:
A3
Abstract:
A viscometer for testing the viscosity of a fluid, comprising a rotor that engages with a stator, the rotor being coupled to a drive means capable of rotating the rotor with respect to the stator, there been a separation gap between the stator and the rotor for the accommodation of fluid to be tested, and measurement means for measuring the characteristics of the rotor and/or stator such that the viscosity of the fluid can be determined. The drive means accelerates the rotor from rest or from a low rotational speed which does not significantly affect the specified test temperature of the rotor, stator and test fluid, to the required angular velocity, and the measurement of the required characteristics are taken, all within a time period sufficiently short such that no temperature change significant to the calculation of the viscosity occurs. The required angular velocity is such that rotating the rotor at or near this velocity for longer than the said time period would cause a temperature change significant to the calculation of the viscosity to occur.
Inventors:
CLIVE HAMER (GB)
Application Number:
PCT/GB2003/002113
Publication Date:
March 11, 2004
Filing Date:
May 16, 2003
Export Citation:
Assignee:
PCS INSTR LTD (GB)
CLIVE HAMER (GB)
CLIVE HAMER (GB)
International Classes:
G01N11/14; (IPC1-7): G01N11/14
Foreign References:
| DE2314671B1 | 1974-02-14 | |||
| US2812656A | 1957-11-12 | |||
| FR2445958A1 | 1980-08-01 |
Other References:
SUTERA S P ET AL: "A PROGRAMMABLE, COMPUTER-CONTROLLED CONE-PLATE VISCOMETER FOR THE APPLICATION OF PULSATILE SHEAR STRESS TO PLATELET SUSPENSIONS", BIORHEOLOGY, vol. 25, no. 3, 1988, pages 449 - 459, XP009018577
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