Linear motor conveyance system
CA 2029698 C · Owner: Lamprey Investment Holdings Limited · Inventors: Manning, Michael John Nicholas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The linear motor conveyance system is intended to power conveyances in shafts typically mine shafts. The system includes spaced apart parallel winding , support, members 10 carrying stator windings and extending in the direction of the shaft. A, reaction member 16 is located between the winding support members 10 so as to be driven along the shaft by electromagnetic forces. The reaction member 16 is composed of a number of reaction elements typically permanent magnets 18, which, are arranged in groups 20. The groups are articulated to one another to take account of shaft inaccuracies.
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 November 9, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2012.
- 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.