Dual diaphragm apparatus with diaphragm assembly and rupture detection methods
US4971523A · kind A · utility
21Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1988 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Sep 13, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A diaphragm assembly includes a pair of superposed flexible diaphragms adhesively secured to an annular spacer ring. The space between the diaphragms and the interior of the rings is filled preferably with de-ionized water. The resistivity of the water is monitored to detect conductivity changes upon leakage or diaphragm rupture when pumped materials or pump lubricant mix with the water. Diaphragm assembly and rupture detection methods are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.