Valve stem assembly with multiple leg retainer
CA 2417618 A1 · Owner: Dana Corporation · Inventors: Hegemier, Timothy A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radially compliant valve stem seal assembly for an internal combustion engine includes a metallic retainer having a plurality of circumferentially spaced, axially depending legs. Each of the legs includes at least one radially inwardly, depending protuberance adapted to engage a valve guide surface. The legs are arranged and disposed on the retainer to be radially flexible yet axially , stiff, to, balance forces of installation against those of securement of valve stem seal assembly, over a wide valve guide diameter tolerance range. W one disclosed embodiment the, retainer has three separate circumferentially spaced legs each including a , single, dimple in its structure. The dimples …
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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 January 29, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2025.
- 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.