Injection molding torpedo with thermocouple bore
CA 2091409 C · Owner: Babin, Denis L. · Inventors: Babin, Denis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Injection molding apparatus for hot tip gating wherein a torpedo is screwed into a threaded seat in the forward end of a nozzle. The torpedo has an elongated shaft with a pointed tip mounted centrally in an outer collar by a pair of spiral blades which impart a swirling motion to the melt flowing to the gate. The temperature of the melt in the gate varies according to a continuous thermodynamic cycle in the torpedo. A thermocouple bore extends radially inward through the outer collar and one of the spiral blades to a conductive inner portion of the central shaft of the torpedo. The thermocouple bore is positioned whereby a thermocouple element extends radially outward from it into an …
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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 March 10, 1993 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2015.
- 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.