Relaxation-type viscosimeter having a magnetic field generator and method therefor
US6988392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2000 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Dec 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2013/0258
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The process for measuring viscosity relies on the observation of the relaxation of a sample drop (A) initially flattened between two plates (7,8), normally without any contact with them due to a gas layer blown through their opposite faces (10, 11); one correlates the observed phenomenon with a relaxation model fitting each portion of the measurement curve so as to estimate concurrently the viscosity and the shear rate, then the sensitiveness of the viscosity to the shear rate by compiling the said portions. The proposed viscometer includes a variable magnetic field generator (16) to produce, using a removable screen (18), various stirring and shears in the sample (A).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.