Global Patent Index - EP 0833712 A4

EP 0833712 A4 2000-05-03 - DIAMOND OR CBN FLUTED CENTER CUTTING END MILL

Title (en)

DIAMOND OR CBN FLUTED CENTER CUTTING END MILL

Title (de)

DIAMANT ODER CBN ZENTRUMSCHAFTFRÄSER

Title (fr)

FRAISE A EXTREMITE DE COUPE CENTRALE CANNELEE EN DIAMANT OU EN DIAMANT POLYCRISTALLIN

Publication

EP 0833712 A4 (EN)

Application

EP 95920412 A

Priority

US 9505944 W

Abstract (en)

[origin: WO9635537A1] A center cutting or plunging end mill (10) or ball mill has one or more spiral grooves (18) and flutes (14) in the walls of a mill body (12) of cemented tungsten carbide. Each groove (18) includes polycrystalline diamond (30) or cubic boron nitride formed in situ along a leading edge (15) of each flute. Such a groove (18) extends across the cutting end of the mill so that the mill can be used for center cutting or plunging. The vein of diamond-like material may extend to the center of the mill body or may extend almost all of the way to the center, leaving an area of tungsten carbide exposed at the center of the mill body. A high temperature-high pressure press is used for forming the polycrystalline diamond-like veins in situ within the grooves in the mill.

IPC 1-7 (main, further and additional classification)

B23C 5/02; B23C 5/06; B23C 5/10; B23C 5/16

IPC 8 full level (invention and additional information)

B23C 5/10 (2006.01)

CPC (invention and additional information)

B23C 5/10 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE DK FR GB IE IT LI SE

EPO simple patent family

WO 9635537 A1 19961114; AU 2587095 A 19961129; EP 0833712 A1 19980408; EP 0833712 A4 20000503; JP H11504868 A 19990511; ZA 9603779 B 19961125

INPADOC legal status


2002-03-20 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010906

2001-06-13 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010425

2000-05-03 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20000316

2000-05-03 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT CH DE DK FR GB IE IT LI SE

2000-05-03 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7B 23C 5/02 A, 7B 23C 5/06 B, 7B 23C 5/16 B, 7B 23C 5/10 B

1998-04-08 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19971118

1998-04-08 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT CH DE DK FR GB IE IT LI SE