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:
Jul. 08, 1980
Filed:
May. 03, 1978
Erich Eigner, Lodersdorf, AT;
Waagner-Biro Aktiengesellschaft, Vienna, AT;
Abstract
A tumbling mill such as a tube or ball mill, wherein an outer shell is provided with an interior liner made up of a series of rings surrounding and distributed along the axis of the shell and each defining and surrounding an interior hollow milling space which has the cross section of a star with rounded points, in a plane normal to the shell axis, with this space having sharp corners extending inwardly toward the shell axis and alternating with the rounded points. The series of rings which form the liner in the shell are angularly offset one with respect to the next in a haphazard, non-uniform manner, and the configuration of the star-shaped space which is surrounded by each ring is that of a pair of superposed squares which have rounded corners and which are angularly offset one with respect to the other so that the rounded corners of one square alternate with the rounded corners of the other square to provide the space which is surrounded by each ring with the configuration of an eight-pointed star having rounded points.