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Expired Canadian patentCanada

Axial flow inducers for hydraulic devices

CA 1053075 A · Owner: Nikkiso Co. · Inventors: Agata, Akihiko; Tsutsui, Toshiaki; Hamaguchi, Tomomitsu

CIPO record

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

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Abstract From the Canadian patent

The present invention provides an axial flow inducer for hydraulic devices comprising a pump casing a rotary shaft, rotatably journaled by said pump casing a main impeller secured, to said rotary shaft and an inducer coaxially arranged in front of a fluid suction inlet side of said main impeller said, inducer comprising at least two stages of axial flow blades including a front stage axial flow blade part located at the fluid inlet side and a rear stage axial flow blade part the, outer diameter of said rear stage axial flow blade part being smaller than the outer diameter of said front stage axial flow part, the blade angle of said front stage axial flow part being made smaller than that of …

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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 April 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 24, 1979
Term endedApril 24, 1996
Patent numberCA 1053075 A
Classification (IPC)F04D3/02

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedApril 24, 1979Term endedApril 24, 1996

Sources & verification

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