Drive apparatus for an injection unit
CA 2235380 C · Owner: Cincinnati Milacron Inc. · Inventors: Reinhart, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electro-mechanical drive apparatus uses an electric drive motor (20) and three one-way clutches (42, 66, 74) to provide both injection and extruder functions in an injection unit (10) of an injection molding machine. During rotation of the drive motor in an injection direction a third one-way clutch , (42) engages, rotating a ball screw mechanism (32) which results in forward movement of a feed screw (14), a second one-way clutch (66) slips and a first one-way clutch (74) engages to prevent rotation of the feed screw as it moves forward. When the drive motor is rotated in an extrusion direction the second , one-way clutch engages, the first one-way clutch slips and the third …
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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 October 1, 1996 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2018.
- 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.