Vacuum valve to be used in an emergency system to reduce the risk of escape of liquid from tankers due to injuries under the waterline
US5365964A · kind A · utility
22Cited by
4References
14Claims
0Family size
Inventor
Key dates
| Filing date | Dec 1, 1992 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Dec 1, 2012 |
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 (11, 12, 13, 33, 35, 36) for applying a supplemental closing force to 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 escapage from an injury under the waterline caused by grounding, and the supplemental closing force will therefore close the valve very fast and will thereby contribute to maintaining a high vacuum in the tank, counteracting continued escape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.