Snow wings
CA 2256908 C · Owner: Wessman, Brian · Inventors: Wessman, Brian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pair of wing assemblies for attachment to a snow thrower or snow blower employing an impeller within a housing and having a forward opening therein to facilitate the feeding of snow to the impeller. The wing assemblies are each adjustably pivotally attached to a horizontal rack provided on each side of the housing. The position of each wing assembly is determined by the position of an arm connecting the back of the wing with the rack. In a first operative position suitable for use after a light snowfall the wings are positioned so as to diverge forwardly and thus increase the catchment area of the snow to be fed to the impeller thereby improving the efficiency of operation of the snow …
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 December 21, 1998 and granted March 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2020.
- 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.