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Title:
CERAMIC HEATER AND GLOW PLUG
Document Type and Number:
WIPO Patent Application WO/2007/108491
Kind Code:
A1
Abstract:
A ceramic heater in which a defect that a gap is formed at the interface between an insulating base and a heating resistor hardly occurs in the production process and in use and a glow plug using the ceramic heater are provided. The ceramic heater (110) comprises the insulating base (111) extending in the axial direction AX and the heating resistor (115) buried in the insulating base and having a heating part (116), lead parts (117, 117), and lead-out parts (118a, 118b). The ceramic heater (110) meets an expression S1 ≤ 0.34Sa where the area of the cross section of the ceramic heater (110) perpendicular to the axial direction AX is Sa and the total of the cross sectional areas of the pair of lead parts (117, 117) is S1.

Inventors:
KURONO, Hirokazu (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
黒野 啓一 (〒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)
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:
JP2007/055754
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)
KURONO, Hirokazu (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
黒野 啓一 (〒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)
NISHIHARA, Hiroshi (14-18, Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 4678525, JP)
International Classes:
H05B3/03; F23Q7/00; H05B3/10; H05B3/14; H05B3/18; H05B3/48
Foreign References:
JPH0220293U1990-02-09
JP2006024394A2006-01-26
JP2005300046A2005-10-27
JP2006049279A2006-02-16
JP2002203665A2002-07-19
Other References:
See also references of EP 1998595A4
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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