Apparatus for cleaning a filter cloth in a filtering device
CA 2355863 A1 · Owner: Danielsson, Ake · Inventors: Ralvert, Ake; Danielsson, Ake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for cleaning a filter cloth (222) in a filtering device (200) with a rotatable drum (210) has an inlet (212) for the liquid that is to be filtered. The drum (210) has in its circumferential surface (216) openings (213) through which the filtering liquid is conducted in a filtering direction out of the drum (210) for filtering through a filter cloth (222). The cleaning apparatus comprises at least one spray nozzle (233) which is adapted to spray cleaning liquid onto a portion of the filter cloth (222) in a direction opposite to the filtering direction. Moreover the appratus comprises a driving device for providing a reciprocating motion of the spray nozzle (233). The …
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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 December 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2021.
- 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.