Differential with laser hardened case
CA 2279509 A1 · Owner: American Axle & Manufacturing, Inc. · Inventors: Gage, Garrett W.; Haske, Larry G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a method for hardening the gear pockets in a differential case through use of laser energy. As such each gear , pocket, is left with a plurality of hardened tracks formed on its wall surface. The laser, hardened tracks reduce the damaging effect of any wear condition experienced between the wall surface in the gear pockets and gears rotatably mounted therein.
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 2, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 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.