Sealing arrangement for a segmented rotary valve
CA 2046359 C · Owner: Fuhl, Rudolf · Inventors: Fuhl, Rudolf; Hoppe, Hans; Beirle, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a segmented wheel rotary valve, a sealing arrangement is positioned between the side discs of the segmented wheel and the respective adjacent bearing supporting housing covers. The sealing arrangement includes a plastic filler ring which is positioned in a floating arrangement between each cover and the respective adjacent side disc and is loaded in axial as well as radial direction by an appropriate resilient ring or spring arrangement. The sealing arrangement experiences relatively reduced wear and thus uneven wear of the sealing rings is substantially prevented.
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 July 5, 1991 and granted July 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2013.
- 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.