Viscometer
US4175425A · kind A · utility
Inventor
Key dates
| Filing date | Jun 21, 1978 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Jun 21, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A viscometer of the type has a chamber within which there are concentric, open ended cylindrical elements, one within the other. A drive is provided to rotate one of the elements and the inner element, which is free to turn, has one end of a readout rod connected axially thereto. The readout rod extends freely through a tube which seals the rod against the fluid flowing through the chamber and its other end is outside the viscometer with the rotor of a readout device connected thereto. The major percentage of the wanted torsional resistance against the turning of the inner element relative to the other element is provided by a resilient device which also ensures lateral stability for the inner element thus enabling the rod-sealing tube to offer but a minor percentage of such resistance. The readout rod is held by a bearing adjacent its outer end and close to the center of gravity of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.