Round rings and flat links traction chain
CA 2182992 C · Owner: Lavoie, Sylvain · Inventors: Lavoie, Sylvain; Lavoie, Laval
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a traction chain designed to be mounted on the tread of a vehicle wheel particularly the wheel of a heavy vehicle like a skidder. This chain comprises a number of round rings positioned in a regular pattern such that each ring is equidistant from all other rings closest to it. This chain also comprises a number of links loosely attached to the rings so as to connect each ring to the rings closest to it. Each link is comprised of a piece of metal of substantially constant rectangular section whose width greatly exceeds its thickness. This piece forms a flattened loop in which the rings are loosely attached. This loop has flat top and bottom surfaces which lie in planes …
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 August 8, 1996 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2018.
- 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.