Elongation drive device of stretch rod in stretch blow molding machine and bottom-type lifting drive device
CA 2508450 A1 · Owner: Kobayashi, Sentaro · Inventors: Sakai, Osamu; Koda, Hideaki; Kobayashi, Sentaro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The elongation drive device of a stretch rod provided in a stretch blow molding machine and a bottom-type lifting drive device are simplified downsized and rendered durable by using both a magnetic screw shaft and a magnetic nut member that smoothly permit a rotation-linear motion conversion in a non-contact condition. A nut member and a screw shaft provided in a elongation drive device (6) and a lifting drive device (30) are respectively formed of a magnetic nut member (65,116) and a magnetic screw shaft (66 117) , in which N-pole magnetized strips and S-pole magnetized strips are spirally and alternately applied at the same pitch to the inner peripheral surface of a cylindrical …
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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 December 10, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2025.
- 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.