Spark plug

Details Spark plug Spark plug

2007-06-12

2007-06-12

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

C313S118000, C313S143000, C313S144000, C313S145000, C123S1690EL, C123S14500A, C123S14500A, C123S635000

Reexamination Certificate

active

10990988

ABSTRACT:
A spark plug includes a metal shell, an insulator, a center electrode, a ground electrode, and a terminal fixed to the insulator. The dimensional parameters in the structure of the spark plug, such as a maximum diameter A of the terminal and a diameter B of the insulator satisfy a dimensional relationship defined through experimental investigation. The structure facilitates an attachment of a plug cap to the spark plug.

REFERENCES:
patent: 6680561 (2004-01-01), Yamaguchi et al.
patent: 5-55489 (1993-07-01), None
patent: 09219273 (1997-08-01), None

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