Global patent index - EP 1058595 A1

EP 1058595 A1 2000-12-13 - MULTI-PASS GRINDING METHOD

Title (en)

MULTI-PASS GRINDING METHOD

Title (de)

MEHRFACH-DURCHLAUF SCHLEIFVERFAHREN

Title (fr)

PROCEDE DE MEULAGE A PASSES MULTIPLES

Publication

EP 1058595 A1 (EN)

Application

EP 99909605 A

Priority

  • US 9904106 W
  • US 7607198 P

Abstract (en)

[origin: WO9943469A1] A multi-pass grinding method for fabricating an endodontic instrument. A tapered rod (10) is sucessively advanced past a rotating grinding wheel (12) to remove layers (14, 16, 18, 20) of material from the rod (10) until attaining a desired flute depth. The method is characterized by relatively shallow cutting depths, relatively high feed rates and low grinding wheel wear. The method reduces the process time and operator supervision required for fabricating nickel-titanium endodontic instruments. A further process is disclosed for automatically compensating for wear on the grinding wheel (12) so that periodic recalibration of the grinding wheel (12) may be eliminated or reduced.

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

B24B 19/04

IPC 8 full level (invention and additional information)

A61C 5/02 (2006.01); B24B 1/00 (2006.01); B24B 17/10 (2006.01); B24B 19/04 (2006.01); B24B 27/00 (2006.01); B24B 51/00 (2006.01)

CPC (invention and additional information)

B24B 1/00 (2013.01); A61C 5/023 (2013.01); B24B 17/10 (2013.01); B24B 19/04 (2013.01); B24B 27/0084 (2013.01); B24B 51/00 (2013.01)

Designated contracting state (EPC)

DE FR

EPO simple patent family

WO 9943469 A1 19990902; AU 2877499 A 19990915; EP 1058595 A1 20001213; EP 1058595 A4 20020821; JP 2002504440 A 20020212

INPADOC legal status

2003-03-26 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020924

2002-08-21 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20020704

2002-08-21 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR

2002-08-21 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7B 24B 19/04 A, 7A 61C 5/02 B, 7B 24B 19/02 B

2000-12-13 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000804

2000-12-13 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR