Drive with linear motor, lift with this drive and method of operating this drive
CA 2464150 C · Owner: Kocher, Johannes · Inventors: Evertz, Joerg; Kocher, Johannes
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 drive (10), a method of operating this drive and a lift (100) which is operated by this drive for the movement of persons or goods by at least one cage (20). The drive comprises at least one linear motor with a secondary part (3) between a first primary part (1 1') and a second primary part (2, 2'). The drive comprises at least one compensation means (5) which acts by a compensating normal force against an attractive normal force between each of the primary parts and the secondary part.
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 13, 2004 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 13, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 2026.
- 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.