Twin airfoils for a sport-curling brush
CA 2446348 A1 · Owner: Wilson, David Gary · Inventors: Wilson, David Gary
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Twin airfoils for mounting to a push broom or brush used in the winter sport of curling. Main objective is to aerodynamically enhance brushing performance by utilizing a curved, surface to create a Coanda effect (tendency of air to follow a curved surface), reducing air, pressure on the leading surface of a moving curling stone. As a secondary benefit, these, "wings" help reduce ice-contact friction of a brush used as a sliding balance during stone, delivery. May also modernize or enhance the appearance of a curling brush similar to how, adding an air spoiler to an automobile aids defining a sports car.
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 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2025.
- 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.