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:
Mar. 16, 2021
Filed:
Feb. 17, 2016
Bühler Ag, Uzwil, CH;
BÜHLER AG, Uzwil, CH;
Abstract
A roller mill () for grinding material, an aspirating assembly (') and a method of retrofitting an existing roller mill. The roller mill () contains a grinding space (′) for grinding material, a separating wall () separates the grinding space from an aspiration space (′). At least one aspiration opening (), is formed in the separating wall () through which aspiration air can flow due to a pressure difference between the aspiration space and the grinding space. The roller mill () has a closing element () for opening and closing the aspiration opening (). The closing element () is in or moves into an opening position (O), which opens the aspiration opening (), when the pressure difference exceeds a threshold value, and is in or moves into a closing position (S), which closes the aspiration opening (), when the pressure difference falls bellow the threshold value.