Oil flow sensing
US6789420B2 · kind B2 · utility
2Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Oct 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrical current is passed through a thermistor to raise its temperature above the temperature of oil flowing in pulses past the thermistor. A change is measured in the temperature of the thermistor occurring with respect to one or more of the pulses. A level of oil flow is determined corresponding to the measured change in temperature. A signal is issued based on the determined flow level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.