Global patent index - EP 0975075 A2

EP 0975075 A2 2000-01-26 - A method for producing a spark plug

Title (en)

A method for producing a spark plug

Title (de)

Herstellungsverfahren einer Zündkerze

Title (fr)

Méthode de fabrication d'une bougie d'allumage

Publication

EP 0975075 A2 (EN)

Application

EP 99122560 A

Priority

  • EP 97110583 A
  • JP 18834796 A
  • JP 33511996 A

Abstract (en)

A method for producing a spark plug comprising a central electrode, an insulator provided exterior to the central electrode, main metallic shell provided exterior to the insulator in such a way that the central electrode protrudes from one end, and a ground electrode coupled at one end to the metallic shell and which has the other end disposed to face the central electrode (3), with a chip being secured to either the central electrode or the ground electrode or both to form spark discharge gap (g). The chip is made by working an alloy including Ir based alloy, including Rh in an amount ranging from 3 wt.% to less than 50 wt.% to a chip of desired dimensions. <IMAGE>

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

H01T 21/02

IPC 8 full level (invention and additional information)

F02P 13/00 (2006.01); C22C 5/04 (2006.01); H01T 13/39 (2006.01); H01T 21/02 (2006.01)

CPC (invention and additional information)

H01T 21/02 (2013.01); H01T 13/39 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 0817341 A1 19980107; EP 0817341 B1 20000906; EP 0817341 B2 20031210; CN 1059293 C 20001206; CN 1170980 A 19980121; DE 69703011 D1 20001012; DE 69703011 T2 20010111; DE 69703011 T3 20040527; EP 0975075 A2 20000126; EP 0975075 A3 20000202; JP 3461670 B2 20031027; JP H1074575 A 19980317

INPADOC legal status

2004-07-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040116

2003-10-22 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030905

2000-10-18 [AKX] PAYMENT OF DESIGNATION FEES

- Free Format Text: DE FR GB IT

2000-05-03 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000307

2000-02-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): DE FR GB IT

2000-01-26 [AC] DIVISIONAL APPLICATION (ART. 76) OF:

- Ref Document Number: 817341

- Country of Ref Document: EP

- Format of ref. document F/P: P

2000-01-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB IT