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:
Dec. 04, 1984
Filed:
Dec. 15, 1981
Applicant:
Inventor:
Finn Lass, Copenhagen, DK;
Assignee:
F. L. Smidth & Co., Cresskill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241 30 ; 241 37 ; 241121 ;
Abstract
The present invention relates to a vertical roller mill including a grinding roller which is urged against a grinding path on a grinding table by a hydraulic cylinder. The loading on the roller is measured by a transducer and the acceleration of the roller by an accelerometer. Resulting signals are combined at a controller which controls a valve through which hydraulic fluid is supplied to the hydraulic cylinder, so that the loading is compensated for the influence of the instantaneous velocity and acceleration of the roller.