Gear system
CA 2129188 C · Owner: Ikona Gear Usa, Inc. · Inventors: Koriakov-Savoysky, Boris A.; Vlasov, Ivan P.; Aleksahin, Igor V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a conventional internal gear pair system such as a planetary gear system with a small gear ratio of the internal gear to the driving pinion common problems include tip interference and limited contact between the teeth of the gears. An internal gear pair system which avoids these problems includes a pinion meshing with an internal gear the pinion having as few as one tooth less than the internal gear the only contact between the pinion and the internal gear being on at least one side of a line extending diametrically through the centers of the pinion and the internal gear and the teeth of the pinion being conjugate to the internal gear teeth.
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 July 29, 1994 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 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.