Title:
SPARKING PLUG
Document Type and Number:
WIPO Patent Application WO/2016/013615
Kind Code:
A1
Abstract:
[Problem] To provide a sparking plug capable of preventing failures caused by gas remaining inside, even if said sparking plug has, at the front end part of the central electrode, a conductor cylinder mounted on the outside surface of an insulation cylinder. The central electrode (2) consists of a rear end part (21) provided with has a terminal part (20) to receive electric supply from the outside, and of a front end part (22) which diameter is smaller than the rear end part (21) diameter, and which is provided with an electrode tip part. At the front end part (22), a conductor cylinder (2A) is mounted on the outside surface of an insulation cylinder (2B). A ring (2C) to prevent the insulation cylinder (2B) from falling out is arranged on the inside surface at one end of the conductor cylinder (2A). The outside surface of the other end of the conductor cylinder (2A) is joined to the rear end part (21) of the central electrode (2). A gas exhausting mechanism (6) consisting of recesses and protrusions formed on the contact surface between the ring (2C) to prevent the insulation cylinder (2B) from falling out and said insulation cylinder, discharges to the outside the gas remaining inside.
Inventors:
IKEDA YUJI (JP)
KANBARA SEIJI (JP)
KANBARA SEIJI (JP)
Application Number:
PCT/JP2015/070972
Publication Date:
January 28, 2016
Filing Date:
July 23, 2015
Export Citation:
Assignee:
IMAGINEERING INC (JP)
International Classes:
H01T13/20; H01T13/34; H01T13/40
Foreign References:
| JP2012127286A | 2012-07-05 | |||
| JP2011003482A | 2011-01-06 | |||
| JP2001227442A | 2001-08-24 |
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