Gear making process
CA 2121923 C · Owner: Eaton Corporation · Inventors: Lisowsky, Bohdan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of manufacturing a helical gear allowing strategic placement of a hardenable wear-resistant and high strength layer at predetermined locations on the gear. The method includes the steps of forming (24) a gear core preform having the general shape of the helical gear and positioning (26) the gear care preform within an elastomeric mold having the specific shape of the helical gear. The method also includes the steps of filling (26) the mold at the predetermined locations with the hardenable metallurgical material and densifying (28) the gear core preform and the metallurgical material. Lastly the, method also includes the step of heat treating (30) the densified gear core preform and …
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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 April 5, 1994 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2016.
- 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.