A device for continuously varying a rotative speed
CA 2203076 C · Owner: Grossi, Imperio · Inventors: Grossi, Imperio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device for, continuously varying a rotative speed including a first, (1, 2, 3) and a second (4 5, 6) differential assembly, each one including a plurality of functionally interconnected wheels, the first differential assembly being arranged on the drive shaft and the second differential assembly being arranged on the driven shaft said first and second differential assembly reciprocally interacting by means of the coupling of at least a wheel (2) of the first assembly witha wheel (4) of the second assembly.
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 April 18, 1997 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 2019.
- 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.