Backwash system for filter thickeners
CA 1323313 C · Owner: Robinsky, Eli I. · Inventors: Robinsky, Eli I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for backwashing filter elements in a filter vessel. At least one collapsible bladder in the form of a tube is suspended together with a plurality of filter elements in a mixture compartment of a vessel for filtering solids from a liquid-solids mixture, the tube having a volumetric displacement at least as great as the volume of filtrate required to flow from a filtrate compartment into the filter elements to slightly expand filter fabric enveloping the filter elements to disengage filtrate deposited thereon. Means are provided to fill the tube with fluid for expansion thereof and to rapidly empty fluid from the tube for sudden collapse of the tube and attendant rapid …
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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
- Granted October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
- 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.