Capillary rheometer plunger pressure transducer and measurement technique
US5209107A · kind A · utility
9Cited by
4References
68Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Apr 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capillary rheometer including a plunger pressure transducer assembly which contains a liquid metal fill capillary passage therein. When the plunger is urged downward onto the melted polymer, a diaphragm at the end of the plunger senses the pressure within the melted polymer and transmits this pressure to the liquid metal fill. An additional diaphragm disposed in the opposite end of the plunger pressure transducer assembly senses this transmitted pressure within the liquid metal fill for an accurate indication of the pressure therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.