Pressure relief valve with pressure indicating means
US4232698A · kind A · utility
16Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1978 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Sep 28, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8326
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An adjustably positionable element having a curved end plate is located in proximity to the conventional rupturable curved disc in a pressure relief valve for high pressure cylinders. The end plate serves as one plate of a capacitor and the curved disc serves as the other plate. Impedance variation responsive circuitry senses any change in impedance of the capacitor due to a change in flex of the curved disc brought about by a variation in pressure within the cylinder to which the relief valve is attached. The change in impedance is calibrated to provide an indication of the actual pressure within the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.