Liquid level indicators
US7287426B2 · kind B2 · utility
10Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Mar 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level indicator, suitable for determining the level of a volatile liquid within a container, includes temperature sensors spaced vertically apart from each other. A processor processes the outputs of the temperature sensors and produces an indication, such as an audible indication by an audible alert device, when liquid level is detected. The determination of liquid level can be by one or more of various temperature processing techniques, including difference in temperature between temperature sensors, and/or difference in temperature over time at one or more of the temperature sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.