Double acting cylinder for filling dies with molten metal
CA 2119582 A1 · Owner: Kidd, Thomas F. · Inventors: Thompson, Stephen A.; Kidd, Thomas F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A melting casting process produces meltable metal cores for subsequent molding of components made of plastic material and encapsulated components such as turbine blades so they may be held for machining. The process utilizes a double acting piston (12) in a cylinder (10) to permit unlimited dispensing capacity without having to pause between piston strokes. The apparatus comprises a tank (32) for containing molten metal, a double acting cylinder (10) having both ends closed and an injection piston (12) therein and an operating mechanism for reciprocating the piston (12) in the cylinder (10). Valve mechanisms (20, 26) are provided so that when the piston (12) is moved in either direction …
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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
- Filed August 31, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2014.
- 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.