Saw tooth mounting system and saw tooth
CA 2236657 C · Owner: Chappell, Jack Raymond · Inventors: Isley, Reggald Emory; Chappell, Jack Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A saw blade has a rotatable body with a plurality of cutting elements mounted around its periphery. The cutting elements have self holding tapered shanks which are received in sockets in holders on the saw blade. The sockets have corresponding tapers. The holders are U-shaped members which straddle the peripheral edge of the body. The shanks are dimensioned so that the holders are slightly deformed when the cutting elements are fully inserted into the holders. This helps to grip the cutting elements tightly in the holders. The holders have bearing surfaces adjacent the sockets . The bearing surfaces bear against faces on the cutting elements when the cutting elements are fully engaged in …
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 May 4, 1998 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 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.