On-board rotational viscometers
US6412338B2 · kind B2 · utility
20Cited by
11References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A viscometer for sensing or characterizing the stress required to shear a fluid at a given rate includes a pair of members coaxially mounted for relative rotation. Between the members is an annular gap defining a flow path for the fluid. The flow path is configured such that during differential rotation of the members, fluid is caused to flow through the annular gap that is a function of the differential rotation and the viscosity of the fluid. A sensor measures the torque or torque equivalent required to achieve such differential rotation between the members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.