Heavy-duty valve stem seal assembly
CA 2387032 A1 · Owner: Stamback, Mark Allen · Inventors: Hegemier, Timothy Alan; Stamback, Mark Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integral valve stem seal retainer and spring seat for a valve seal subassembly is disclosed having lower and upper portions. An annular sealing member engages the upper portions of the metal retainer and an annular flange extends radially outwardly of the lower portion of the retainer to engage at least one, coil of a valve spring. The annular sealing member further includes upper and lower, portions, wherein the upper portion engages an outer surface of a valve stem while the, lower portion engages a transitional surface of a valve guide.
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 May 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2024.
- 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.