Invention Grant
- Patent Title: Ignition plug
-
Application No.: US15938368Application Date: 2018-03-28
-
Publication No.: US10178751B2Publication Date: 2019-01-08
- Inventor: Kohei Usami , Kenji Ban
- Applicant: NGK Spark Plug Co., LTD.
- Applicant Address: JP Nagoya
- Assignee: NGK SPARK PLUG CO., LTD.
- Current Assignee: NGK SPARK PLUG CO., LTD.
- Current Assignee Address: JP Nagoya
- Agency: Leason Ellis LLP
- Priority: JP2017-69841 20170331
- Main IPC: H01T13/32
- IPC: H01T13/32 ; H01T13/52 ; H01T13/20 ; H01T13/34 ; H05H1/52

Abstract:
An ignition plug includes a center electrode; a cylindrical insulator that surrounds at least the circumference of a front end portion of the center electrode and that includes a bottom portion at the front side; and a cylindrical metal shell that holds the insulator from the outer circumference side. The center electrode includes a shaft portion that extends along an axial line and a head portion disposed at a front end of the shaft portion. The head portion has a width greater than that of the shaft portion in the radial direction. The insulator includes a first and second insulator. The first insulator has an axial hole and a diameter smaller than the maximum diameter of the head portion. The second insulator is joined to the first insulator. The shaft portion is disposed in the axial hole of the first insulator. The second insulator encloses the head portion.
Public/Granted literature
- US20180288864A1 IGNITION PLUG Public/Granted day:2018-10-04
Information query