Title:
CERAMIC HEATER WITH CYLINDRICAL MEMBER AND GLOW PLUG
Document Type and Number:
Japanese Patent JP2019128124
Kind Code:
A
Abstract:
To provide a ceramic heater with a cylindrical member that allows the ceramic heater to be hardly damaged.SOLUTION: A ceramic heater with a cylindrical member comprises: the ceramic heater comprising a base made of insulating ceramic and extending along an axis, and a conductor comprising a heat generating part embedded in the base and made of insulating ceramic; and the cylindrical member holding the base along the axis while exposing at least a portion in which the heat-generating part is embedded out of the base. In the ceramic heater, grinding marks are formed on a surface of a portion exposed from the cylindrical member out of the base. When viewed from a direction orthogonal to the axis, an angle formed by at least a first grinding mark continuous with the cylindrical member out of the grinding marks and an imaginary line passing through the first grinding mark and parallel to the axis is 80° or less.SELECTED DRAWING: Figure 2
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Inventors:
SUGA YOHEI
TAKEUCHI HIROTAKA
IGAI YOSHIHITO
TAKEUCHI HIROTAKA
IGAI YOSHIHITO
Application Number:
JP2018011274A
Publication Date:
August 01, 2019
Filing Date:
January 26, 2018
Export Citation:
Assignee:
NGK SPARK PLUG CO
International Classes:
F23Q7/00
Domestic Patent References:
| JP2002364843A | 2002-12-18 | |||
| JP2013215822A | 2013-10-24 |
Attorney, Agent or Firm:
Patent Service Corporation Shinmei Century