Modified ubbelohde viscosimeter
US4028929A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1976 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Mar 5, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Ubbelohde viscosimeter is disclosed which is modified according to the present invention by mounting to its reservoir a pressure tube and to the upper ends of the pressure tube and the conventional capillary tube a double three way cock. The cock controls pressure supply to the reservoir, as well as selectively connecting the reservoir to atmosphere. In addition a separate suction tube is provided in association with the reservoir to permit selective withdrawal of material from the reservoir. By this arrangement viscosity measurements of polymer solutions at high temperatures are possible without removing the viscosimeter from the thermostat for cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.