Locking fastener
CA 2079477 C · Owner: Ewing, Paul Edward · Inventors: Ewing, Paul Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A locking threaded fastener (10, 60, 60') of the wedge-action type is disclosed, with threaded (12, 12', 12") threadless (14 14', 14") nut members with wedge , elements (26, 28, 32, 34, 82, 86) therebetween for wedging the nut members (12 12', 12", 14, 14', 14") apart when the threaded nut member (14 14', 14") is turned in the , loosening direction. In a two-piece nut (10), the threadless nut member (14) has a flat inner surface, (44) for engaging the workpiece (22) and the wedge elements (26 28, 32, 34) , have en-, gaging surfaces with a coefficient of friction therebetween which is less than that be-, tween the flat inner surface (44) and the workpiece surface. In a three-piece nut …
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 February 5, 1992 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2014.
- 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.