Flexible screw for conveyors
CA 2091325 A1 · Owner: Mitsubishi Cable Industries, Ltd. · Inventors: Furukawa, Kiyoshi; Ito, Takahisa; Ohtsuji, Masaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible screw for conveyors which comprises a flexible, rod and a polymer-coated cord helically wound on the rod said, cord comprising a core and a polymer layer formed on the core and said core comprising a fiber bundle having a specific amount of buckling of not more than 0.3%. When the screw is used for transporting containers, it can adapt itself to a drastic change in the surrounding temperature and can endure a great tension caused by the transport of heavy containers since, winding pitch of the cord is not easily widened and the disturbance of the pitch can be prevented.
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 March 9, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2015.
- 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.