Asynchronous electric machine and rotor and for use in association therewith
CA 2099951 C · Owner: Sundyne Corporation · Inventors: Arkkio, Antero
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An asynchronous electric machine, wherein a rotor rotating relative to a stator is provided with an electrically conductible coating. An air gap (8) between rotor (6) and stator (2) is substantially according to a formula in which formula, Dr = outer rotor diameter (mm) Ds = inner stator diameter (mm), u = peripheral speed (m/s) .delta. = air gap (mm), A = a constant whose magnitude ~ 0.3, preferably 0.7 - 1.5 suitably 1; description, mm, B = a constant whose magnitude < 150, preferably 50 - 100 suitably 70, C = a constant, whose magnitude < 1200 preferably 300 600, suitably 400;, description m/S/mm The peripheral speed of rotor (6) is more than 100 m/s. The rotor (6) is provided on a shaft …
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 6, 1993 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2015.
- 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.