Plasticizing and injecting unit for use in an injection molding machine
CA 2041775 C · Owner: Hehl, Karl · Inventors: Hehl, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The plasticizing and injecting unit comprises at least one hydraulic advance-retract actuator that is provided with external screw threads which are, screwed into internal screw threads of a bore formed in a carrier and supply block. Means for locking the advanceretract actuator in the bore in that the interengaging screw threads are wedged against each other comprise a plurality of lock screws, which are parallel to the injection axis and disoosed on a circle that surrounds the bore in which the actuator is received. Said screws can be tightened to different degrees so that the carrier and supply block and the advance-retract actuator are biased in mutually opposite senses and any …
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 May 3, 1991 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2013.
- 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.