Fluidic level control system
US4522228A · kind A · utility
Inventor
Key dates
| Filing date | Jun 12, 1984 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Jun 12, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/731
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A liquid level control system for controlling the flow of liquid into a reservoir, storage tank or other container. A nozzle develops a liquid flow stream therethrough, and a valve effectively opens and closes the nozzle. A fluid amplifier is associated with the nozzle and includes a fluid power stream, a signal developing port for receiving a fluid pressure signal from the power stream, and a sensor for diverting the fluid power stream from the signal developing port in response to the static presence of the interface at a predetermined sensing level of liquid in the reservoir. A pressure responsive switch is coupled to the valve and is located below the signal developing port of the fluid amplifier. A pressure signal tube communicates between the signal developing port and the pressure responsive switch to create a hydrostatic pressure head above the switch to maintain the switch and, therefore, the valve in a first condition when the fluid power stream delivers a fluid pressure signal to the signal developing port. A second condition is developed when the fluid power stream is diverted from the signal developing port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.