Coaxial linear motor for extended travel
CA 2290059 A1 · Owner: Linear Drives Limited · Inventors: Boast, Gerard Sean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiphase linear motor has an elongated stator with a stack of permanent magnets end-to-end along its length and a coaxial drive coil configuration which is, such as to leave a gap permitting mechanical support of the permanent magnets at, least at intervals along the length of the stator intermediate its ends. Specifically, the drive coils comprise sub-coils with arcuate turns which subtend less than 360°, around the motor axis to leave free a gap for the aforementioned mechanical support.
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 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2021.
- 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.