Injection molding assembly
CA 1185412 A · Owner: Export Tool & Welding Co. Limited · Inventors: Dykehouse, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides in a two-stage injection molding unit, a vertical shut-off valve for controlling the flow of a moldable material between the screw and the injection chamber of the molding unit, comprising: a valve body mounted on the unit, the body having a bore in communication with the screw and the injection chamber, a valve plunger slidably supported on the body, the plunger being movable between a first position and a second position, to close and open respectively, communication between the screw and the injection chamber means, for moving the plunger between the first and second positions and wherein when the valve is in the first position and the screw is overspun, …
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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
- Granted April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- 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.