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Expired Canadian patentCanada

Vortex flow meter

CA 1306120 C · Owner: Atsumi, Koji · Inventors: Atsumi, Koji; Misumi, Masao

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A vortex flow meter having a vortex generator comprises a plurality of vortex generating elements installed in a fluid passage against the fluid's flow and perpendicular thereto. An upstream-side vortex generating element and a downstream-side vortex generating element both arranged in parallel at a predetermined interval therebetween in the direction of the fluid's flow. Zero to plural flat plates are arranged in parallel at equal intervals between both vortex generating elements. The representative length portions of the vortex generating elements are located respectively on the surfaces opposed to each other. The frequency ratio of the vortexes generated when, independently arranged, are …

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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

  • Granted August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 13, 1987
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306120 C
Classification (IPC)G01F1/32

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 13, 1987Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.