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Title:
CERAMIC HEATER AND GLOW PLUG
Document Type and Number:
WIPO Patent Application WO/2007/108490
Kind Code:
A1
Abstract:
A ceramic heater where a failure such as a gap at the boundary between a heating element and an insulating base is less likely to occur in a production process or use process, and a glow plug using the ceramic heater. The ceramic heater (110) has an insulating base (111) extending in the direction of an axis (AX), and also has a heating element (115) embedded in the insulating base (111) and having a heating portion (116), lead portions (117, 117), and lead lead-out portions (118a, 118b). The ceramic heater (110) satisfies the formula a ≥ 0.15(b + c), where a is the minimum gap between the pair of lead portions (117, 117) on the minimum imaginary line (kl) in a cross-section perpendicularly intersecting the direction of the axis (AX), and b and c are the dimensions of the pair of lead portions (117, 117), respectively.

Inventors:
NISHIHARA, Hiroshi (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
西原 寛 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 日本特殊陶業株式会社内 Aichi, 4678525, JP)
Application Number:
JP2007/055753
Publication Date:
September 27, 2007
Filing Date:
March 20, 2007
Export Citation:
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Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
日本特殊陶業株式会社 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 Aichi, 4678525, JP)
NISHIHARA, Hiroshi (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
International Classes:
H05B3/10; F23Q7/00; H05B3/03; H05B3/14; H05B3/18; H05B3/48
Foreign References:
JP2003238252A2003-08-27
JP2004251613A2004-09-09
JP2006049279A2006-02-16
JP2005300046A2005-10-27
JP2006024394A2006-01-26
JPH0220293U1990-02-09
JP2002203665A2002-07-19
JP2002220285A2002-08-09
JP2002289327A2002-10-04
Other References:
See also references of EP 1998596A4
Attorney, Agent or Firm:
COSMOS PATENT OFFICE (Annex 2nd Floor, Nagoya Center Building 2-22, Nishiki 2-chome, Naka-ku, Nagoya-sh, Aichi 03, 4600003, JP)
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