Spark plug and semi-finished product thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 4, 2018
Grant Date -
May 17, 2018
app pub date -
Nov 15, 2017
filing date -
Nov 17, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A spark plug includes a main fitting having a first, second, and third portions adjacent to each other. The spark plug further includes an insulator having a first opposing portion with a predetermined portion opposed to the first portion with a first interval, a second opposing portion with a second portion opposing the second portion with a second interval, and a third opposed portion opposed to the third portion. A connecting portion between the second opposing portion is supported by a support portion, and a value obtained by dividing the first interval by a length from the support portion to a rear end portion of the predetermined portion is configured to be smaller than a value obtained by dividing the second interval by a length from the support portion to a rear end portion of the second opposed portion.
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Cited Art Landscape
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