Melt pressure measurement and the like
US5224383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0681
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention features a melt pressure measurement device for measuring the pressure of a melted substance useful in cooled state for forming solid objects. The device comprises a probe for insertion through an aperture in a wall of a melt-containing vessel, with the probe having a pressure-deflectable end surface for contact with pressurized melt. The probe has pressure-resistant securing means for fixing the probe in the wall with the end surface of the probe exposed for contact with the melt in a non-flow obstructive relationship. A seal surface on the probe between the end of the probe and the securing means provides cooperative sealing action with a mating sealing means associated with the wall to prevent exposure of the melt to the securing means. The probe also has pressure detection means internal of the probe, responsive to deflection of the end surface of the probe, for detecting pressure of the melt. The pressure detection means comprises a temperature-compensated capacitive sensor, with one plate of the capacitor defined by the end surface of the probe exposed to the melt and the opposite plate of the capacitor mounted within the probe. A capacitive gap is defined by th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.