Pressure gauge construction
US4196633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L7/043
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Excess pressure being supplied to a pressure gauge is controllably relieved through the gauge cavity and an unsealed aperture in a spring-like crystal. A sleeve member extends transversely in a forced engagement between the inside face of the crystal and an annular gasket compressed in surrounding relation about the inlet of the Bourdon tube. The gasket normally seals the passage clearance about the tube inlet against supply pressure leakage therepast but in response to an overpressure is displaced inwardly toward the cavity until leakage can occur. Concomitant displacement of the sleeve member deflects the crystal outwardly a like amount afforded by its spring rate matched in correlation with the maximum anticipated overpressure to be provided for.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.