EP 0400950 B1 20000209 - Spark plug
Title (en)
Spark plug
Title (de)
Zündkerze
Title (fr)
Bougie d'allumage
Publication
Application
Priority
JP 13276089 A 19890529
Abstract (en)
[origin: EP0400950A1] In a spark plug for an internal combustion engine, a center electrode has a firing tip at its front end. The firing tip is made from iridium powder compact which is degreased, and sintered in a condition such as a vacuum, or inert atmosphere, so that the density of the powder compact is more than 90 percent to impart a spark-corrosion resistant property.
IPC 1-7
IPC 8 full level
H01T 13/39 (2006.01); H01T 21/02 (2006.01)
CPC (source: EP)
H01T 13/39 (2013.01); H01T 21/02 (2013.01)
Citation (examination)
- EP 0353196 A1 19900131 - BATTELLE MEMORIAL INSTITUTE [CH]
- US 4427915 A 19840124 - NISHIO KANEMITSU [JP], et al
- GB 1099387 A 19680117 - JOHNSON MATTHEY CO LTD
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0400950 A1 19901205; EP 0400950 B1 20000209; DE 69033451 D1 20000316; DE 69033451 T2 20000608; JP H031475 A 19910108; JP H07109783 B2 19951122
DOCDB simple family (application)
EP 90305797 A 19900529; DE 69033451 T 19900529; JP 13276089 A 19890529