Making precision castings using thixotropic materials
CA 2309900 A1 · Owner: Chipless Metals Llc · Inventors: Buckley, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Precision castings, such as brake calipers and parts requiring a fine finish and having complex internal geometries can be produced by casting a shot of a semi-solid thixotropic metal alloy about a core (12) preferably a hot-chamber , die-cast core having a lower melting point than the solid-to-semi-solid transition temperature of the thixotropic alloy. Then after the shot , solidifies to form a casting (10) with a captured core (12) the core (12) is , melted from the casting in a liquid bath in an air or gas furnace, or during , heat treatment of the part. The process dramatically reduces or even eliminates machining requirements for cast metal parts because the inner surface of the …
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 October 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2020.
- 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.