Centrifugal pump impeller having auxiliary vanes
CA 2601680 C · Owner: Weir Minerals Africa (Proprietary) Limited · Inventors: Geldenhuys, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A centrifugal pump (10) includes a pump casing (12) within which an impeller (14) is mounted for rotation, cantilever fashion on a shaft (16). The casing , (12) has an axial inlet (20) and a peripheral volute (22) around the impeller (14) leading to an outlet (24). The impeller (14) has axially spaced annular sides (26, 28) with radially outwardly arranged rearwardly curved, vanes (30) , between the sides. Outwardly of the sides clearing corresponding sides of the , casing (12) auxiliary vanes (32, 34) are provided to generate a pressure gradient to prevent or counteract leakage of working fluid. Leading faces of the auxiliary vanes slope relative to a perpendicular to the sides i.e. …
Read the whole patent
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 March 10, 2006 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.