Disk locking device
CA 2258134 C · Owner: Norton Company · Inventors: Halliley, Alistair G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Locking devices for attaching an abrasive disk to a grinder are provided by a backup pad and lock nut combination wherein the mounting aperture of the backup pad is shaped to correspond to the exterior surface of the barrel of the lock nut which is provided with at least two planar surfaces. This is particularly useful in securing correct alignment where the backup pad is intended to support an abrasive disk having a specific configuration that requires the disk and the backup pad to be aligned in a specific way.
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 6, 1999 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2021.
- 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.