Method of die casting machine lubrication with unitized lubricant
CA 2189172 C · Owner: Freeman, Lewis Gene · Inventors: Freeman, Lewis Gene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of lubricating a lubricant requiring portion of a die casting machine includes inserting a unitized lubricant element of flowable material into a cylinder when an associated ram is retracted and advancing the ram against the lubricant element to squeeze the element against a partially closed end of the cylinder and force the lubricant to flow through a restricted passage to the portion to be lubricated. A metal injecting shot sleeve and plunger may act as the cylinder and ram for lubricant delivery prior to the introduction of molten casting metal where the die cavity is to be lubricated but provision of a separate cylinder and ram apparatus is preferred. Various forms of unitized …
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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 30, 1996 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.