Vacuum valve for use in an emergency system for reducing the risk of escape from injuries under the waterline of tankers
US5213127A · kind A · utility
2Cited by
3References
23Claims
0Family size
Inventor
Key dates
| Filing date | Mar 6, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Mar 6, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7897
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vacuum valve for use in a tanker is constructed with means for releasing a supplemental force on the valve body if the pressure drop across the vacuum valve rises substantially above a value designated for the vacuum valve. Such an extraordinary rise of the pressure drop will occur by escape from an injury under the water-line caused by grounding, and the supplemental closing froce will therefore close the valve very fast and will thereby contribute to maintaing a high vacuum in the tank, counteracting continued escape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.