Leak detector
US4571987A · kind A · utility
Inventor
Key dates
| Filing date | Sep 21, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Sep 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for testing liquid storage tanks for leakage by using apparatus to measure changes in liquid level and temperature over a predetermined period of time in which the liquid level apparatus includes means for discharging a uniform low pressure to a fixed point below the liquid level in the container and measuring any change in pressures over the predetermined period of time and in which the temperature measuring apparatus includes a liquid filled probe extending for substantially the full depth of the liquid in the tank with any changes in temperature in the probe liquid resulting in an expansion or contraction of the probe liquid with such liquid expansion or contraction being visibly indicated at a sight tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.