Method and apparatus for measuring the rheological characteristics of a fluid, in particular of a biological fluid such as blood
US4643021A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Oct 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and to a device for measuring, e.g. the viscosity of a fluid, by means of a rotating cylinder immersed in the fluid and on the basis of a torque applied to the cylinder and the cylinder's speed of rotation. The rotary cylinder (50) is completely immersed in the fluid contained in a tube (40) which is itself placed inside a constant temperature jacket (38) and is rotated by a rotating electromagnetic field produced by an induction winding (64) coaxially surrounding the tube and the cylinder and powered with alternating current at an adjustable predetermined intensity. The invention is applicable to measuring the viscosity of biological fluids, such as blood.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.