Global Patent Index - EP 0725463 B1

EP 0725463 B1 20000712 - A spark plug for an internal combustion engine

Title (en)

A spark plug for an internal combustion engine

Title (de)

Zündkerze für einen Verbrennungsmotor

Title (fr)

Bougie d'allumage pour moteur à combustion interne

Publication

EP 0725463 B1 20000712 (EN)

Application

EP 96300722 A 19960201

Priority

JP 1492095 A 19950201

Abstract (en)

[origin: EP0725463A1] In a spark plug (1) for an internal combustion engine, an insulator (2) has a concentric axial bore (2a) in which a center electrode (3) is placed with a front end (3a) of the center electrode extending beyond a front end portion (2b) of the insulator. A metallic shell (4) is placed to support the insulator (2). An outer electrode (5) is connected to a front end (4a) of the metallic shell (4) to form a spark gap (G) with the front end portion (3a) of the center electrode (3). At least an outer surface of the outer electrode (5) is formed by a smoothly curved profile so as to smoothly run air-fuel mixture along the outer electrode (5). <IMAGE> <IMAGE>

IPC 1-7

H01T 13/32

IPC 8 full level

H01T 13/20 (2006.01); H01T 13/32 (2006.01)

CPC (source: EP)

H01T 13/32 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0725463 A1 19960807; EP 0725463 B1 20000712; CN 1050707 C 20000322; CN 1136721 A 19961127; DE 69609209 D1 20000817; DE 69609209 T2 20001123; JP H08213149 A 19960820

DOCDB simple family (application)

EP 96300722 A 19960201; CN 96101357 A 19960201; DE 69609209 T 19960201; JP 1492095 A 19950201