Bearing system in a refiner
CA 2122142 A1 · Owner: Reinhall, Rolf B. · Inventors: Reinhall, Rolf B.; Kjellqvist, Olof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bearing system in a refiner for manufacturing pulp where the, raw material is refined in a refining gap between at least one pair of refining members (22, 24) rotating relative to one another and where at least one of said refining members (24) is supported by an axially movable and rotary axle (26). The bearing system comprises a combined hydrostatic/hydrodynamic axial bearing arrangement and consists of a housing (32) with at least one rotary piston (30), which is attached on the rotary axle (26) for rotation with the same. A stationary holder (29 33) is located in the, housing (32) on at least one side of the rotary piston (30). An outer and an inner ring cylinder (200, 210 and …
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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 December 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2014.
- 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.