Gas rate sensor
US4930349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | May 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The gas rate sensor in the present invention is provided with a holder assembly having a metallic holding portion for holding flow sensors and a cylindrical casing containing the holder assembly and heater wires which are wound around the outside thereof. The outer periphery of the holding portion is provided with a plural number of projections which are brought into compressive contact with the inner periphery of the casing for enabling pressing of the holder assembly into the casing. A temperature detection element is disposed in a gas flow passage between the holder assembly and the casing for performing energizing control of the heater wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.