Spark plug having a metallic shell with defined relationship...

Details Spark plug having a metallic shell with defined relationship... Spark plug having a metallic shell with defined relationship...

2011-04-12

2011-04-12

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Shaped electrode chamber, insulator end, shell skirt, baffle...

C313S144000

Reexamination Certificate

active

07923910

ABSTRACT:
A spark plug including an insulator and a metallic shell having an outer surface and an inner surface. The outer surface has a taper portion which comes into contact with a peripheral region around a mounting hole of an internal combustion engine, a tool engagement portion, and a trunk portion formed between the tool engagement portion and the taper portion. The inner surface has an annular step portion projecting toward the insulator and an internal trunk portion extending from the base of the step portion toward the rear end of the metallic shell. When the insulator and the metallic shell are fixed to each other by one of either cold and hot crimping, the projected area of the taper portion is at least two times or at least 1.5 times that of the step portion, respectively.

REFERENCES:
patent: 6373173 (2002-04-01), Suzuki
patent: 2008/0061670 (2008-03-01), Nakayama et al.
patent: 2009/0102345 (2009-04-01), Hotta et al.
patent: 404570 (1990-12-01), None
patent: 1022828 (2000-07-01), None
patent: 06333664 (1994-12-01), None
patent: 2002260817 (2002-09-01), None
patent: 2007-059077 (2007-03-01), None
patent: 2008-091322 (2008-04-01), None

Affiliated with

Also associated with

Rating

Spark plug having a metallic shell with defined relationship... 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 having a metallic shell with defined relationship..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spark plug having a metallic shell with defined relationship... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2679219