Venturi flowmeter for use in an exhaust sampling apparatus
US6546812B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 11, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | May 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2264
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for sampling the emission content of an exhaust gas from an exhaust source has an exhaust inlet adapted for connecting the exhaust source with a venturi metering device for measuring the flow rate of the exhaust gas. The venturi metering device includes a housing having an entrance section, a throat section, and an exit section, the throat section having a smaller diameter than the entrance and exit sections. The housing includes first and second pressure transducers that produce an electrical output that characterizes the pressure that the pressure sensing means senses, the electrical outlet enabling a computer of the venturi metering device to accurately measure the pulsating flow of the exhaust gas in both directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.