Mix-in structure for gas or the like in pressurization centrifugal pump
CA 2493419 A1 · Owner: Yonehara, Ryoichi · Inventors: Yonehara, Ryoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mix-in structure for a gas or the like in a pressurization centrifugal pump capable of mix-discharging liquid and gas or the like to prevent cavitation and of suppressing gas residence in the pump chamber at the time of operation stoppage or the like. It comprises a drum-like case (4) having a suction port (2) and a delivery port (3), in which opposedly disposed are a vane wheel (5) radially formed with a plurality of vanes (19) a pressurization surface (36) , formed with a compression chamber (33) opposed to the vane wheel (5) and converging from the suction port (2) toward the vanes (19) and pressurization , section (16) formed with a pressurization partition wall (35) disposed …
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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 July 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2025.
- 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.