Patent · US Expired

Roller mill

US4915311A · kind A · utility

0Cited by

2References

7Claims

0Family size

Assignee

Krupp Polysius AG · DE

Inventors

Heinz Grachtrup · Ennigerloh, DE
Otto Heinemann
Helmut Krumme · Wadersloh, DE
Helmut Lucke · Beckum, DE
Werner Schossler · Ahlen, DE
Karl von Greiffenstern · Beckum, DE

Key dates

Filing date	Feb 16, 1989
Grant date	Apr 10, 1990
Priority date	—
Expiry date	Feb 16, 2009

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB02C4/283
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a roller mill with two rollers, a grinding gap formed thereby and a material inlet shaft the end walls of which bear on their lower ends carrier plates with replaceable sintered metal wear parts. Each wear part is formed by a plurality of small sintered metal plates of small area which are set close against one another like a mosaic and are individually screwed onto the carrier plate so that in case of wear only those small sintered metal plates which are actually worn can be replaced simply, quickly and economically.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.