Seal arrangement
CA 2235448 C · Owner: Vogt, Rolf · Inventors: Vogt, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sealing arrangement for use with a rotatable machine element for maintaining a medium in a sealed space. The sealing arrangement includes a sealing surface on the machine element and a radially sealing ring having a polymeric sealing lip for engagement with the sealing surface. The sealing lip has a sealing edge defined by a pair of intersecting first and second conical surfaces, whereby the first conical surface is directed towards the sealed space and encloses a first angle with the axis of rotation which is steeper than the cone angle of the conical surface directed away therefrom. A helical groove with rounded base is machined into the sealing surface, whereby the groove base has a …
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 22, 1998 and granted August 26, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2020.
- 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.