Expansion chamber method and apparatus for eliminating accuracy errors when testing gaseous flowmeters
CA 2059355 A1 · Owner: Geery, Paul W. · Inventors: Geery, Paul W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A properly designed expansion chamber is mounted in a flowmeter test equipment configuration to quench or prevent pulsations from resonating the acoustic cavities in the configuration and, thereby eliminate, resonation errors in testing the accuracy of the flowmeter. The invention is particularly though not exclusively adapted to use with a testing configuration including a prover master meter and a conduit connecting the inlet of the prover master meter to the outlet of the gaseous flowmeter being tested. In the practice of the present invention, the pulsation frequencies can be quenched before the acoustic cavity within the conduit can be excited by introducing an expansion chamber at one …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.