Rotation viscosimeter and method for determining the viscosity of materials using a rotation viscosimeter
US10976230B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Oct 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the viscosity of materials uses a rotation viscosimeter having a measuring shaft connected through a coupling element to a drive and a measuring element on a shaft end applied to a sample. An angle measuring unit measures an angle deflection between drive and shaft. The measuring element is immersed in a measuring container containing the sample. The rotational speed of the shaft increases from a first measuring point at an initial speed in steps to further measuring points and the angle deflection between the drive and the shaft is determined in the measuring points. An estimation function is determined for the rotational speed and the angle deflection for the sample using measured values in the measuring points. An optimum rotational speed is determined based on the estimation function of a previously defined optimum angle deflection and the viscosity measurement of the sample is carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.