EP 0991490 A1 20000412 - METHOD FOR IMPROVING WEAR RESISTANCE OF ABRASIVE TOOLS
Title (en)
METHOD FOR IMPROVING WEAR RESISTANCE OF ABRASIVE TOOLS
Title (de)
METHODE ZUM VERBESSERUNG VERSCHLEISSWIEDERSTAND VON SCHLEIFWERKZEUGEN
Title (fr)
PROCEDE D'AUGMENTATION DE LA RESISTANCE A L'USURE D'OUTILS ABRASIFS
Publication
Application
Priority
- US 9812602 W 19980616
- US 87738297 A 19970617
- US 9589198 A 19980611
Abstract (en)
[origin: WO9857771A1] A drill bit (10) is provided with a cylindrical body portion (24) fabricated from a plastic material. The body portion is fastened in concentric, end to end relation to a cylindrical cutter (12) fabricated from a metallic material and having an array of cutting elements (16) disposed thereon. The body portion and cutter are preferably tubular, wherein the cutting elements are disposed in an annular array, to facilitate core or crown drilling operations.
IPC 1-7
IPC 8 full level
B23B 31/00 (2006.01); B23B 51/04 (2006.01); B28D 1/04 (2006.01); B28D 1/14 (2006.01)
CPC (source: EP)
B23B 31/005 (2013.01); B23B 51/0426 (2013.01); B28D 1/041 (2013.01); B23B 2226/61 (2013.01); B23B 2231/0228 (2013.01); B23B 2251/02 (2022.01)
Citation (search report)
See references of WO 9857771A1
Designated contracting state (EPC)
AT BE CH DE ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9857771 A1 19981223; AU 727957 B2 20010104; AU 7973998 A 19990104; BR 9810048 A 20000919; CA 2291279 A1 19981223; CN 1105614 C 20030416; CN 1260741 A 20000719; EP 0991490 A1 20000412; ID 24113 A 20000706; JP 2001527469 A 20011225; NZ 501168 A 20010629
DOCDB simple family (application)
US 9812602 W 19980616; AU 7973998 A 19980616; BR 9810048 A 19980616; CA 2291279 A 19980616; CN 98806139 A 19980616; EP 98930324 A 19980616; ID 991611 A 19980716; JP 50474399 A 19980616; NZ 50116898 A 19980616