Method for the manufacture of rivet or for a fixed spike or for a sleeve-mounted spike, respectively, and equipment for carrying out the method
CA 1315939 C · Owner: Neste Oy · Inventors: Suvanto, Erkki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for the manufacture of a rivet for a fixed spike or for a sleeve-mounted spike respectively, by pressing, in a mould. In the method of the invention the cavity space in the, mould , corresponding to the shape of the spike to be manufactured, is first filled to the desired extent with a first material to form the body part of the spike. Hereupon a first punch whose diameter is substantially smaller than the diameter of the cavity space in the mould, is fitted into the cavity space concentrically with the cavity space, and the annular space between said first punch and the cavity space is filled with a second material so as to form the wear-resistant surface …
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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
- Granted April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
- 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.