Relief valve
US4972872A · kind A · utility
6Cited by
4References
2Claims
0Family size
Inventor
Key dates
| Filing date | Oct 31, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7761
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pressure relief valve is disclosed that includes a ball valve and an electrically powered valve operator for opening and closing the valve in response to electrical signals. A conduit connects a piezoelectric pressure gauge to upstream pressure. The gauge sends opening and closing electrical signals to the operator when the pressure in the conduit reaches preselected amounts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.