Valve gate assembly for injection molding
CA 2317779 A1 · Owner: Babin, Denis · Inventors: Babin, Denis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve pin assembly for an injection molding apparatus is disclosed comprising a valve pin capable of movement up and down in a nozzle to open and close a ring gate. An annular passage is created through the nozzle and is unobstructed and without restriction at all points up to and through the ring, gate, permitting melt to flow freely to the gate and depending on the , position, of the valve pin into the mold cavity. The valve pin has a head with a diameter, larger than the valve pin shaft for selectively closing the gate. The ring gate, channel diameter is larger than the melt channel diameter to permit parts with large apertures therein to be formed.
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 September 6, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2022.
- 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.