Spark plug insulator containing mullite and spark plug including same

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United States of America Patent

PATENT NO 9912126
SERIAL NO

15507893

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An insulator is rendered less breakable. A spark plug insulator is a tube-shaped spark plug insulator having a through hole extending in a direction of an axial line. The spark plug insulator contains alumina as a main component and mullite at at least part of the insulator. Mullite is contained in only an inner circumferential surface of the tube-shaped spark plug insulator and in at least part of the inner circumferential surface of the spark plug insulator in an area extending toward a distal end from a portion having a largest outer diameter.

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Patent Owner(s)

  • NGK SPARK PLUG CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujimura, Kengo Ichinomiya, JP 13 13
Honda, Toshitaka Nagoya, JP 60 318
Kurono, Hirokazu Nagoya, JP 46 165
Nagae, Ryuji Hioki, JP 1 2

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