Cylinder head gasket
CA 2006347 A1 · Owner: Nicholson, Terence P. · Inventors: Nicholson, Terence P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal gasket comprises perforated metal sheets 11 13, corrugated around at least 1 aperture and secured by an intervening layer 15 of adhesive extending across the corrugations. The peaks of the corrugations have elastomer layers 23. The corrugations preferably have a profile providing a hard right-angled junction between the corrugation and the plane sheet, and a relatively shallow intervening arc, causing the corrugation to collapse with a rolling action under compression. In a cylinder head gasket, the cylinder apertures are not provided with corrugations but shims 21 are provided between the gasket sheets around the cylinder apertures. The gaskets have been found to provide …
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 December 22, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.