Spark plug for internal-combustion engines

Details Spark plug for internal-combustion engines Spark plug for internal-combustion engines

2006-11-16

2010-12-28

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

C313S143000, C313S144000, C148S419000, C148S428000, C420S455000

Reexamination Certificate

active

07859177

ABSTRACT:
A spark plug for an internal-combustion engine is provided wherein the central and ground electrodes exhibit a long service life and wherein the fatigue strength at high temperatures is improved. The ground electrode is made from an alloy comprised of nickel (Ni) as a primary component, chromium: 20-30% by weight, iron: 7-20% by weight, aluminum: 1-3% by weight, titanium: 0.05-0.5% by weight, manganese: not higher than 0.1% by weight, silicon: not higher than 0.1% by weight, and carbon: not higher than 0.5% by weight. The alloy further includes at least one specific element selected from zirconium, yttrium, neodymium, cerium, lanthanum and samarium. Further, the total content of the specific element group is 5% or more of the aluminum content and is not higher than 1% by weight.

REFERENCES:
patent: 5755897 (1998-05-01), Brill
patent: 6472801 (2002-10-01), Matsubara et al.
patent: 6761854 (2004-07-01), Smith et al.
patent: 2002/0158559 (2002-10-01), Sugiyama et al.
patent: 2004/0013560 (2004-01-01), Hrastnik
patent: 2000-336446 (2000-12-01), None
patent: 2002-129268 (2002-05-01), None
patent: 2002-235138 (2002-08-01), None
patent: 2002-260818 (2002-09-01), None
Patent Abstracts of Japan, Patent & Utility Model Gazette DB, Japanese Patent Application Laid-Open (kokai) No. 2002-235138, abstract (1 page in English) and claims (1 page in English); http://www4.ipdl.ncipi.go.jp/Tokujitu/tjsogodbenk.ipdl.

Affiliated with

Also associated with

Rating

Spark plug for internal-combustion engines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spark plug for internal-combustion engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spark plug for internal-combustion engines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4221382