Patent · US Expired

Wear-resistant hard-surfacing for the rolls of high-pressure roll presses for size reduction of granular material

US5704561A · kind A · utility

13Cited by

7References

13Claims

0Family size

Assignee

DEUTZ AKTIENGESELLSCHAFT · DE

Inventors

Jakob Ansen · Cologne, DE
Frank Fischer-Helwig · Neukirchen, DE
Ludger Alsmann · Neunburg vorm Wald, DE
Michael Wollner · Gummersbach, DE

Key dates

Filing date	Aug 28, 1995
Grant date	Jan 6, 1998
Priority date	—
Expiry date	Aug 28, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB02C4/305
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The rolls of high-pressure roll presses for the compressive size reduction of granular material are hard surfaced with nub pins which are wear-resistant and suitable for autogenous wear protection. The nub pins, which have a long potential service life even under the action of high compressive loads, have a radially inner pin part (13) which is easily welded to the roll surface (12) and a radially outer harder pin part (14) protectively covering the radially inner pin part.

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