Gearing system
CA 2053285 C · Owner: Young, Niels O. · Inventors: Young, Niels O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gearing system includes a pair of gear support plates (5 10) arranged to rotate about parallel but offset axes (9 14) with, the plates extending parallel to each other in parallel radially extending planes. Each plate includes axially extending teeth (40 45) having concave (43, 54) and convex (42 52) opposed surfaces. The teeth are interdigitated axially such that various pairs of interdigitated teeth will be in cooperating surface contact. Rotation of each support plate about its own axis causes the teeth to orbit relative to each other and engage in a driving relationship in a smooth manner with the convex portion of certain teeth engaging smoothly with the concave portion of adjacent …
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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 February 19, 1991 and granted May 13, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 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.