Set screw
CA 2048964 C · Owner: Corrigan, Niall · Inventors: Beegan, Desmond; Corrigan, Niall; Keating, Gerry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a set screw comprising a shank having external threads and a work-engaging end portion integrally formed at one end of the shank. The work-engaging end portion has a frustohemispherical outer surface comprising a plurality of circumferentially spaced serrations in the form of teeth. Each of the teeth comprises a ramp extending outwardly from a root to a crest thereof with the ramp being inclined in a direction which is opposite to the direction of rotation of engaging the set screw in a workpiece. A cavity is formed in the outer extremity of the work-engaging end portion. The cavity cooperates with the frustohemispherical outer surface to form therebetween an …
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 12, 1991 and granted April 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2013.
- 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.