Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2010/052875
Kind Code:
A1
Abstract:
Disclosed is a spark plug (100) having a resistor (15) between a central electrode (3) and a terminal fitting (13). The resistor (15) comprises glass, ceramic powder, and an electroconductive material and metal; of these, there exists an average of two or more pieces of the metal in any 300 (μm) × 300 (μm) region of any cross section of the resistor (15), with the metal within this region accounting for less than 1.6% of the total cross-sectional area.
Inventors:
YOSHIDA HARUKI (JP)
NAKAGAWA KEITA (JP)
SHIBATA TSUTOMU (JP)
NAKAGAWA KEITA (JP)
SHIBATA TSUTOMU (JP)
Application Number:
PCT/JP2009/005778
Publication Date:
May 14, 2010
Filing Date:
October 30, 2009
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
YOSHIDA HARUKI (JP)
NAKAGAWA KEITA (JP)
SHIBATA TSUTOMU (JP)
YOSHIDA HARUKI (JP)
NAKAGAWA KEITA (JP)
SHIBATA TSUTOMU (JP)
International Classes:
H01C7/00; H01T13/20
Foreign References:
| JP2005327743A | 2005-11-24 | |||
| JPS60150602A | 1985-08-08 | |||
| JPS5760761B2 | 1982-12-21 | |||
| JPS60150601A | 1985-08-08 | |||
| JPS60150602A | 1985-08-08 |
Other References:
See also references of EP 2348589A4
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Akinari international patent firm (JP)
Patent business corporation Akinari international patent firm (JP)
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