Spark plug

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12080997
APP PUB NO 20240243556A1
SERIAL NO

18559754

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A spark plug includes an insulator having an axial hole, a center electrode disposed in the axial hole and having a forward end portion projecting to a forward end of the axial hole, a tubular metallic shell which holds the insulator on its inner circumference and has a screw portion formed on its outer circumferential surface, and a ground electrode whose first end portion is inserted into a through hole provided in the metallic shell and is welded to the through hole and whose second end portion forms a discharge gap between the second end portion and the forward end portion. The screw portion has a first screw portion located on a rear end of the through hole and a second screw portion located on a forward end of the through hole, and the second screw portion has a pitch diameter larger than that of the first screw portion.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
NITERRA CO LTD1-1-1 HIGASHISAKURA HIGASHI-KU NAGOYA-SHI AICHI 4610005

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gozawa, Tatsuya Nagoya, JP 28 61
Imai, Susumu Nagoya, JP 34 201

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