Air flow measurement apparatus
US6327905A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 21, 1998 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Dec 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/698
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved heating resistor type air flow measurement apparatus which can operate properly even when the noises are produced by a large surge current, and even when the air flow measurement apparatus is made of plastic member. The apparatus has a heating resistor arranged in the main air passage, a temperature-sensitive resistor and a flow measurement circuit for processing signals from their resistors. Inductors are provided between these resistors to prevent noise invasion into the flow measurement circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.