Method for the centrifugal casting of pipes
CA 1232428 A · Owner: Von Roll Infranet Sa · Inventors: Grutter, Kurt; Bergmann, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A molten metal is introduced into a rotating ingot mold during the centrifugal casting of pipes. Before or during the introduction of the molten metal, a metal powder containing 80 wt% or more nickel is fed in, which contains a small amount of further alloying elements. The metal powder has a higher specific weight than that of the molten metal. If the melting point is also made lower than the casting temperature of the molten metal, an alloyed outer skin of the pipe of austenitic cast iron with 21 to 24% nickel is formed. As a result the, pipe, which is manufactured at lower costs has the same, corrosion resistance as an applied protective layer while reliably preventing damage to the …
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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 February 9, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2005.
- 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.