Method for making an electric motor winding
CA 2118932 C · Owner: Mihalko, Emil S. · Inventors: Mihalko, Emil S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for making a wound field for an electric motor generator or alternator includes the steps of continuously winding an insulated conductor into a coil having a first plurality of windings wound in a first direction and a second plurality of, windings wound in a second direction opposite the first direction flattening the coil into a two-layered flat web wherein a, peripheral section of the first plurality of windings overlies a corresponding diametrically-opposite peripheral section of the second plurality of windings. A multiphase wound field (24) can be made by winding a plurality of insulated conductors (38 40 and 42), to form a plurality of groups of adjacent coil units (62 76, …
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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 September 11, 1992 and granted April 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.