The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2024
Filed:
May. 22, 2019
Valmet Ab, Sundsvall, SE;
Åke Sundström, Timrå, SE;
Jonas Magnusson, Sundsvall, SE;
Anders Löfstrand, Sundsvall, SE;
Peter Nykvist, Timrå, SE;
Jörgen Lundberg, Uppsala, SE;
VALMET AB, Sundsvall, SE;
Abstract
A pulp-filter arrangement () comprises a rotatable drum () and a non-rotating valve arrangement (). The rotatable drum () has a cylindrical water-permeable pulp-supporting shell (), a plurality of drain pipes () and a rotating hollow shaft (). The plurality of drainpipes () connects the rotating hollow shaft () with a collecting channel () situated radially directly inside the cylindrical water-permeable pulp-supporting shell (). The non-rotating valve arrangement () is disposed within the rotating hollow shaft () for sealing off the rotating hollow shaft () from a radially inner outlet () of the drain pipes () when respective radially inner outlet () is situated within a sealed zone. The non-rotating valve arrangement () is further arranged to, in a transition zone immediately following the sealed zone, open a throttled passage between the rotating hollow shaft () and the radially inner outlet ().