Metal gasket for cylinder head
CA 2585968 C · Owner: Hirayama, Shinichi · Inventors: Abe, Tsunehiko; Hirayama, Shinichi; Matsushita, Yoshitaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal gasket for cylinder head 1 of plate lamination type comprises two base plates 2 formed of metal plates and each of which , includes cylinder holes 2a circumferential beads 2b formed around the peripheries of individual cylinder holes cooling water holes 2c formed , outside the peripheries of the circumferential beads and an outer bead 2d , formed and positioned so as to entirely enclose the circumferential beads and the cooling water holes, wherein the circumferential beads 2b of the two base plates 2 are aligned in the direction of thickness of the metal gasket. The metal gasket is characterized by inserting claw-like protrusions 3a provided for one of an outer step adjustment …
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 October 27, 2005 and granted January 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.