Mill for grinding granular material

• US 4,807,818 A
• Filed: 10/27/1986
• Issued: 02/28/1989
• Est. Priority Date: 02/26/1985
• Status: Expired due to Fees

• Current Assignee: British Technology Group Ltd.
• Original Assignee: National Research Development Corporation
• Inventors: Standring, Peter M.
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US06/930,370
• Time in Patent Office: 855 Days
• Field of Search: 241/30, 241/117, 241/118, 241/120, 241/123, 241/126, 241/198 R, 241/199, 241/199.9, 241/220, 241/257, 241/258, 241/301
• US Class Current: 241/228
• CPC Class Codes: B02C 15/16 with milling members essentially having different peripheral speeds and in the form of a hollow cylinder or cone and an internal roller or cone
• CPC Class Codes: B02C 2/00 Crushing or disintegrating by gyratory or cone crushers with non-coaxial discs with intersecting axes B02C7/005
• CPC Class Codes: B02C 7/005 Crushers with non-coaxial toothed discs with intersecting axes

Abstract

A conical grinding member (2) is caused to move over a grinding surface (1) and material deposited on the surface is ground by a crushing and shearing action. The mill finds particular application in the grinding of grain.

Claims

1. A mill for grinding granular material comprising:

a grinding surface;

a generally conical grinding member having a hollow therein and an apex;

a mounting arrangement for supporting the grinding member in such a manner that the grinding member can be precessed around the grinding surface, the mounting arrangement including feed means, having one or more holes through a peripheral conical surface thereof for introducing the granular material into the hollow of the grinding member to be fed to the grinding surface as the grinding member is precessed around the grinding surface.