Liquid level control device
US4515178A · kind A · utility
Inventor
Key dates
| Filing date | May 29, 1984 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | May 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/731
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid amplifier for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level. An inlet develops a liquid flow stream. A first passage of major cross-sectional dimensions is provided for delivering a major portion of the flow stream to the reservoir or storage tank. A second passage of minor cross-sectional dimensions is spaced laterally of the first passage for developing a small signal fluid power stream substantially parallel to the major supply stream. A sensor is responsive to the static presence of the liquid level at the predetermined level for altering the smaller fluid power stream from its substantially parallel flow condition to a condition in which it diverts and attaches to the major supply stream. A signal developing device is provided for receiving a fluid pressure signal of one magnitude when the fluid power stream is parallel to the major supply stream and of a second magnitude when the fluid power stream is diverted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.