Metal part and process for its production
CA 2135832 A1 · Owner: Schroder, Gunther · Inventors: Schroder, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rolling ring comprising a base and a wear ring the base, consisting of a material having a higher heat expansion coefficient and a lower wear resistance than the material of the wear ring. A method of construction of such rolling ring wherein the wear ring is placed over the base and solder is applied between them. The assembly is heated causing the base to expand to a greater extent than the wear ring and producing distribution of the solder through the area of the solder joint. Upon cooling of the assembly the greater radial shrinkage of the base produces inwardly directed forces which are transmitted by way of the soldering joint to the wear ring.
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 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2016.
- 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.