System for detecting leaks in underground fuel tanks and the like
US4885931A · kind A · utility
12Cited by
6References
19Claims
0Family size
Inventor
Key dates
| Filing date | Mar 14, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Mar 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for detecting leaks in hazardous liquid tanks, particularly underground gasoline tanks at service stations. The tank is filled incompletely to leave a space in the tank which is then filled with a gas under pressure. A reference tank is disposed within this space and continuous streams of gas are forced into the liquid in the reference tank and the liquid in the tank being measured. Resistance to gas introduction in the reference tank is compared with the resistance to gas introduction in the gasoline tank and monitored during a test period to note any differential variation which would indicate a leak in the tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.