Two reservoir system in which fluid is drawn from one to maintain a level in the other
US4376449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1980 |
| Grant date | Mar 15, 1983 |
| Priority date | — |
| Expiry date | Feb 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86187
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A sensor utilizes the opposition of a fluid to physical displacement to provide information about the fluid itself, such as its quality as measured by its density or viscosity, or about the state of a fluid system which contains it, such as the fluid pressure existing at some point in the system. The sensor includes a fluid displacement device or element physically adapted to displace the fluid and repetitively urged into displacement by the application of a known impetus or urging force. The resulting motion of the element is then analyzed to obtain the information desired. The fluid displacement element may additionally perform a pumping function, or it may operate in a fluid stream externally powered. When employed as a pump, the sensor may provide information on the fluid pumped or on the state of the fluid system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.