Variable geometry tiller
CA 2008235 C · Owner: Bombardier Inc. · Inventors: Pelletier, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the realm of snow grooming devices for ski hills, a unique snow tiller is disclosed. The snow tiller is pulled by a tracked vehicle and has a snow chamber which can be varied in size and dimension. The tiller is also equipped with a cutting drum which works the snow for a longer period of time when the snow chamber is enlarged. By varying the angle of the trailing bar mounted on a flexible membrane, which forms the outer bounds of the snow chamber, more or less snow is retained in the chamber depending upon snow conditions.
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 January 22, 1990 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2012.
- 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.