Pre-stressed pressure transducer and method of forming same
US5349491A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Nov 6, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L13/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pre-stressed capacitive pressure transducer is disclosed which is capable of withstanding an applied high pressure. The transducer incorporates a pre-stress mechanism comprising upper and lower pre-stress members which are welded together to apply a compressive force to the transducer sealing means. The compressive force serves to improve the transducer seal resistance to high pressure damage. The pre-stress mechanism may also be adapted to provide additional overpressure protection by bottoming out against the transducer input flange. A method of forming such a pre-stressed transducer is also disclosed. The pre-stress mechanism and method can be easily adapted to meet the requirements of a wide variety of transducers without requiring modification of the transducer internal design parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.