Overfill protecting arrangement for a liquid storage tank
US5050639A · kind A · utility
Inventor
Key dates
| Filing date | Aug 7, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Aug 7, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86324
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An overfill protecting arrangement for a liquid storage tank comprises in combination a venting valve and a spill valve. The arrangement is designed for a maximum permissible loading rate, and the venting valve is so dimensioned that at this loading rate the tank pressure will assume an equivalent value substantially lower than a safety limit value prescribed by the authorities. The spill valve is a quick-opening valve, preferably a magnetic value, which has an opening pressure distinctly higher than said equivalent value of the tank pressure and lower than said safety limit value. The drops of pressure caused by a flow of liquid at the loading rate into the venting valve system and out of the fully open spill valve are so co-ordinated that flow of gas out of the spill valve and flow of liquid out of the venting valve cannot occur at any circumstances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.