Spark plug

Details Spark plug Spark plug

2006-03-21

2006-03-21

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

C313S144000

Reexamination Certificate

active

07015633

ABSTRACT:
A noble metallic firing tip includes a protruding portion which is formed partly on its outer circumferential surface so as to protrude in the direction substantially normal to the axis of a center electrode. The protruding portion is disposed in confronting relationship via a discharge gap with a distal end of an opposed portion of a ground electrode far from its leg portion.

REFERENCES:
patent: 6166480 (2000-12-01), Ishida et al.
patent: 6215234 (2001-04-01), Abe et al.
patent: 2002/0038992 (2002-04-01), Morita et al.
patent: 2002/0070645 (2002-06-01), Chiu et al.
patent: 2002/0109447 (2002-08-01), Hanashi et al.

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