Improvements in linear induction motors
CA 2129104 C · Owner: Domtar Inc. · Inventors: Gladish, Herbert E. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in the primary (22) and the secondary of linear induction motors for a SAILRAIL air bearing support and conveying systems increase the efficiency of such systems. In the primary (22) the core (36) includes a plurality of laterally adjacent toothed laminations (26) with the edges (40) of the teeth (38) being complementarily curved to the curvature of the rail (12). The electrical windings (42) extend around air ducts (46) formed in the primary improving cooling. Additional cooling is achieved by bleeding air to vertical nozzles (54) in the core (36) the cooling bleed air also helping to support a runner (110) as it passes over the primary (22). The secondary is provided in the …
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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 April 14, 1992 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 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.