Cold chamber die-casting piston
CA 2387617 A1 · Owner: Copromec S.R.L. · Inventors: Schivalocchi, Carlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The finding relates to a piston for cold chamber die-casting machines that comprises a steel body and at least one sealing band in copper alloy mounted around the body into a respective housing in back position with respect to the piston head. At least two channels are provided on the outside surface of the piston comprised between head and sealing band for an inflow on the melted metal under the same band. When such metal solidifies, it creates a thickness that radially pushes the band outwards thus compensating for its wear.
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 May 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2024.
- 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.