Composite powdered metal combustion seal ring
CA 2111771 A1 · Owner: Shuster, Mark M. · Inventors: Willis, Harry G. Jr.; Shuster, Mark M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An annular combustion seal ring for an engine gasket includes a central section having a generally circular cross-section and at least one tab section extending radially away from the central section. The ring is formed from a homogeneous composite powdered metal with material zones of varying densities. The composite powdered metal combustion seal ring has numerous advantages. Not only is it possible to design and manufacture a ring having a desired yield strength in both the vertical and hoop directions, but the stiffness along a particular axis may be selectively varied as a function of seal loading. Also, the varying density zones may provided by layers of material. In other aspects of …
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 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2015.
- 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.