Global Patent Index - EP 0857552 A3

EP 0857552 A3 20000209 - Stone cutting element with increased wear resistance

Title (en)

Stone cutting element with increased wear resistance

Title (de)

Steinbearbeitungswerkzeug mit verbessertem Anschnittverhalten

Title (fr)

Elément pour couper de la pierre ayant une résistance accrue à l'usure

Publication

EP 0857552 A3 (DE)

Application

EP 98200161 A

Priority

AT 10997 A

Abstract (en)

[origin: EP0857552A2] In a stone working (e.g. core drilling) tool with multilayer abrasive elements consisting of sintered metal-bonded cutting material, preferably diamond, each abrasive element (1) has a leading initial cutting zone (3) with a different composition and increased wear compared with the regular portion (4) of the element. Preferably, the initial cutting zone (3) contains a wear promoting filler selected from tungsten disulphide, tungsten carbide, molybdenum disulphide, lime, corundum, silicon carbide, carbon particles, glass, ceramic and pore formers. It contains more fragile and easily worn diamond particles, has a lower concentration of diamond particles and/or has a binder with lower hardness and/or wear resistance, compared with the regular portion (4) of the abrasive element.

IPC 1-7

B28D 1/12; B24D 3/34; B28D 1/04

IPC 8 full level

B24D 3/34 (2006.01); B24D 7/14 (2006.01); B28D 1/04 (2006.01); B28D 1/12 (2006.01)

CPC (source: EP)

B24D 3/34 (2013.01); B24D 7/14 (2013.01); B28D 1/041 (2013.01); B28D 1/12 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0857552 A2 19980812; EP 0857552 A3 20000209; EP 0857552 B1 20001025; AT 197133 T 20001115; DE 59800309 D1 20001130; ES 2154072 T3 20010316

DOCDB simple family (application)

EP 98200161 A 19980122; AT 98200161 T 19980122; DE 59800309 A 19980122; ES 98200161 T 19980122