Liquid level detector
US4582025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1984 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Feb 21, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/78
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.