Self-cleaning filter
CA 1267611 C · Owner: Pneumafil Corporation · Inventors: Williams, Roger D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A self-cleaning apparatus comprising a rotary drum filter which collects foreign matter on one surface of the filter media thereof and a, cleaning apparatus that includes an endless belt having openings formed therein and arranged for axial movement along the surface of the filter media, the belt being mounted for such movement on a plenum chamber having an extending slot which communicates with the openings in the belt during such movement thereof whereby a vacuum imposed within the plenum chamber will act to remove foreign matter from the filter media surface. The belt includes retaining means which permit a variety of nozzle elements or imperforate plates to be …
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.