Spark plug for internal combustion engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9954344
SERIAL NO

15550458

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A spark plug 1 includes a cylindrical housing, a cylindrical insulator, a center electrode, a terminal bracket, a ground electrode, and a resistor. The insulator is held on the inside of the housing. The center electrode 4 is held on the inside of the insulator, with a tip end being projected therefrom. The terminal bracket is held on the inside of the insulator, with a base end part and being projected therefrom. The ground electrode forms a spark discharge gap G between itself and the center electrode. The resistor contains carbon and is disposed on the inside of the insulator so as to be located between the center electrode 4 and the terminal bracket. In an axial direction X of the spark plug, the resistor has a higher carbon content in a first region positioned on a tip side, compared to a second region positioned on a base end side.

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Patent Owner(s)

  • DENSO CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Araki, Hiroshi Kariya, JP 112 1230
Hase, Shin Kariya, JP 1 0
Hattori, Kenji Kariya, JP 58 615
Imanaka, Yasuomi Kariya, JP 10 43
Nakamura, Toshiya Kariya, JP 15 76
Shibata, Masamichi Kariya, JP 63 345
Suzuki, Hirofumi Kariya, JP 73 888
Watanabe, Tomoyuki Kariya, JP 124 1515

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