Cylinder head casting apparatus and method
CA 2017499 C · Owner: Navistar International Transportation Corp. · Inventors: Cagle, Billy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A one-piece cylinder head casting, including reliably located passageways for fuel-air intake for exhaust and for, coolant, is formed by a plurality of interengaging one-piece core elements including a one-piece coolant jacket core a, one-piece exhaust core and a one-piece fuel-air intake core all reliably positioned and held together in an integral core assembly. Preferably, a further core element having a plurality of core supporting and positioning surfaces provides surfaces that mate interfacing surfaces of the onepiece water jacket core, one-piece exhaust core and onepiece intake core and support such cores in position with respect to one another, and the intake core may be provided …
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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 May 24, 1990 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2012.
- 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.