Spark plug

Details Spark plug Spark plug

2007-05-08

2007-05-08

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Spark plugs

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

Reexamination Certificate

active

11220738

ABSTRACT:
A spark plug having a packing interposed between an insulating porcelain and a metallic shell, wherein Young's modulus G of the material forming the metallic shell50and Young's modulus F of the material forming the packing80satisfies the relation of 7.4×1010Pa is less than or equal to F is less than or equal to G minus 5×1010Pa.

REFERENCES:
patent: 6407487 (2002-06-01), Sugimoto
patent: 6632381 (2003-10-01), Sugimoto
patent: 2003/0117052 (2003-06-01), Yamaguchi et al.
patent: 1309052 (2003-05-01), None
patent: 61-93575 (1986-12-01), None
patent: 9045456 (1997-02-01), None
patent: 10073069 (1998-03-01), None
patent: 2002260817 (2002-09-01), None

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