Fan inlet flow controller
CA 2267301 C · Owner: Howden Buffalo Inc.-Npd · Inventors: Harris, Stanley M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for reducing distortion of air flow entering the inlet (16) of a fan (10). The device includes a perforated body member (32) that has a first end (34) that is attachable to the inlet end (16) of the fan (10) and a second end (36). The apertures in the body member (32) are arranged in a plurality of circumferential rows. Preferably the apertures in each successive row from the first end (34) to the second end (36) increase in diameter with the apertures in the row adjacent the first end being smaller in diameter than the apertures in the row adjacent the second end. The body member (32) can be frustoconical cylindrical or ellipsoidal in shape. In addition the body, member …
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
- Filed October 15, 1997 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2019.
- 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.