Apparatus for grinding a fibrous material suspension
US12188177B2 · kind B2 · utility
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16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2021 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Dec 21, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/303
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A refiner for refining pulps, includes a shaft, a rotor disc attached firmly to the shaft and a shaft bearing, the rotor disc being disposed between two stator discs and forming a refining chamber between the rotor disc and the stator discs. The shaft is movable in an axial direction and the shaft bearing is connected hydraulically to the refining chamber, ensuring low wear on the rotor discs and stator discs and, in particular, on the refiner plates on these discs, also in continuous operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.