Screw driven sludge thickeners
CA 1204734 A · Owner: Societe Anonyme D'Etudes, De Recherches Et De Productions D'Agents Chimiques -E.R.P.A.C. · Inventors: Treyssac, Georges; Morawek, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is provided for thickening a suspension of solid particles in a liquid, such as a sludge which may be flocculated, comprising a rotary endless screw extending longitudinally in a cylindrical enclosure provided with at least one inlet for the suspension to be thickened, an outlet for the thickened suspension situated in the vicinity of the front end of the screw and at least one outlet for the thickening liquid, wherein all or part of the threads of the endless screw have, at least on the thrust face a high friction coefficient.
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
- Granted May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
- 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.