Self-adjusting centrifugal impeller
CA 2077924 A1 · Owner: Liszka, John · Inventors: Liszka, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a rotating impeller of a centrifugal pump a fluid is allowed, to leak at angle across the impeller vanes between adjacent internal channels of the impeller, at reduced rates of flow. Such action disturb the homogenous velocity pattern of the fluid inside the channels by causing flow detachment from the trailing surfaces of the impeller vanes and a severe internal circulation of the fluid. This in turn results in reduced pump discharge pressure and a much desirable reduction in energy consumption.
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 September 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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.