Progressing cavity pump system for transporting high-solids, high-viscosity, dewatered materials
CA 2689805 C · Owner: Sliwinski, Richard A. · Inventors: Sliwinski, Richard A.; Wild, Alan G.; Snyder, Charles L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for transporting high-viscosity high-solids, dewatered , materials , essentially includes a progressing cavity pump system utilizing a twin-screw feeder with an , extended tunnel section. The feeding of the material into an extended tunnel section of the twin , screw feeder creates a positive pressure which assists in feeding the product , into the suction housing of the progressing cavity pump and correspondingly, into the pumping elements. This , increases volumetric (fill) efficiency of the progressing cavity pump thereby , allowing a smaller , pump to be used. The suction housing of the progressing cavity pump includes an auger , positioned therein that is …
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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 August 17, 2001 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2023.
- 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
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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.