Spark plug
US-2024275138-A1 · Aug 15, 2024 · US
Spark plug
US8975809B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8975809-B2 |
| Application number | US-201214359175-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 6, 2012 |
| Priority date | Dec 21, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
Official abstract text for this publication.
An ignition plug having a ceramic insulator with an axial bore, a metallic shell provided around the ceramic insulator, and a terminal electrode having a leg portion inserted into a rear end portion of the axial bore and a head portion projecting from the rear end of the ceramic insulator, wherein the length L of a portion of the ceramic insulator projecting from the rear end of the metallic shell is not less than 28 mm but not greater than 34 mm. The thickness t of the thinnest portion of the ceramic insulator is 1.0 mm or greater within a region which extends 5.5 mm from the rear end of the ceramic insulator toward the forward end side with respect to the direction of the axis.
First claim
Opening claim text (preview).
The invention claimed is: 1. An ignition plug comprising: an insulator having an axial bore extending in a direction of an axis; a center electrode inserted into a forward end portion of the axial bore; a terminal electrode having a rod-shaped leg portion inserted into a rear end portion of the axial bore, and a head portion projecting from a rear end of the insulator; and a tubular metallic shell disposed around the insulator such that a portion of the insulator projects fr…
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Frequently asked questions
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- What does patent US8975809B2 cover?
- An ignition plug having a ceramic insulator with an axial bore, a metallic shell provided around the ceramic insulator, and a terminal electrode having a leg portion inserted into a rear end portion of the axial bore and a head portion projecting from the rear end of the ceramic insulator, wherein the length L of a portion of the ceramic insulator projecting from the rear end of the metallic sh…
- Who is the assignee on this patent?
- Ngk Spark Plug Co
- What technology area does this patent fall under?
- Primary CPC classification H01T13/20. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).