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Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2015/099082
Kind Code:
A1
Abstract:
A connecting portion that connects, inside a through-hole of an insulator, a central electrode and a terminal fitting, has a resistor and a magnetic material structure that includes a magnetic material and a conductor that are disposed in a position that is to the tip side or the rear-end side of the resistor and is separated from the resistor. Of the resistor and the magnetic material structure, the member disposed at the tip side is termed a first member, while the member disposed at the rear-end side is termed a second member. The connecting portion further has a first conductive seal portion, a second conductive seal portion, and a third conductive seal portion. The first conductive seal portion is disposed at the tip side of the first member and makes contact with the first member. The second conductive seal portion is disposed between the first member and the second member and makes contact with the first member and the second member. The third conductive seal portion is disposed at the rear-end side of the second member and makes contact with the second member. The magnetic material structure includes a conductive substance as a conductor, an iron-containing oxide as a magnetic material, and a ceramic that includes at least one from among silicon, boron, and phosphorus.

Inventors:
KASASHIMA, Takashi (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
TAKAOKA, Katsuya (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
KUROSAWA, Kazuhiro (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
TANAKA, Kuniharu (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
HONDA, Toshitaka (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
KURONO, Hirokazu (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
YOSHIDA, Haruki (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
UEGAKI, Hironori (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
Application Number:
JP2014/084393
Publication Date:
July 02, 2015
Filing Date:
December 25, 2014
Export Citation:
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Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
International Classes:
H01T13/20
Foreign References:
JPS62150681A1987-07-04
JPS6139385A1986-02-25
JPH02284374A1990-11-21
JPS62150681A1987-07-04
JPS61230281A1986-10-14
JPS54151736A1979-11-29
JPS61135079A1986-06-23
JPS61104580A1986-05-22
JPS61208768A1986-09-17
Other References:
See also references of EP 3089290A4
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN OHTORI INTERNATIONAL PATENT FIRM (Marunouchi Annex Bldg. 8th floor, 18-10 Marunouchi 2-chome, Naka-ku, Nagoya-sh, Aichi 02, 〒4600002, JP)
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