Title:
GLOW PLUG AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2013/145568
Kind Code:
A1
Abstract:
In order to prevent a decrease in the retention force of a retaining part with respect to a heater member and to improve fuel consumption, reduce manufacturing costs, improve the rapid heating property, and conserve power, this glow plug (1) is equipped with: a tubular housing (2), having a shaft hole (4) extending in the direction of the axis line (CL1), and having on the outer circumferential surface a threaded part (5) for screwing into an attachment hole of an internal combustion engine; and a heater member (3) that is inserted into the shaft hole (4) in a state wherein at least the tip part of the heater member protrudes from the tip end of the housing (2). The housing (2) has a pressure contact part (7) that presses against a bearing surface of the internal combustion engine when the threaded part (5) is screwed into the attachment hole of the internal combustion engine, and a tubular tip-side body part (9) that is provided between the pressure contact part (7) and the threaded part (5). The tip-side body part (9) is equipped with a retaining part (20) the inner circumference of which directly or indirectly retains the heater member (3), and the retaining part (20) has the smallest outer diameter in the tip-side body part (9).
Inventors:
OSAWA TAKAYUKI (JP)
ISHII SHUEI (JP)
ISHII SHUEI (JP)
Application Number:
PCT/JP2013/001380
Publication Date:
October 03, 2013
Filing Date:
March 06, 2013
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
F23Q7/00
Foreign References:
| JP2003185137A | 2003-07-03 | |||
| JP2002303424A | 2002-10-18 | |||
| JP2002174423A | 2002-06-21 | |||
| JP2001182937A | 2001-07-06 | |||
| JP2010249354A | 2010-11-04 | |||
| JPH10506982A | 1998-07-07 | |||
| JP2009162409A | 2009-07-23 |
Other References:
See also references of EP 2833069A4
Attorney, Agent or Firm:
AOKI, Noboru et al. (JP)
Aoki 昇 (JP)
Aoki 昇 (JP)
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