Spark plug
US-2017033540-A1 · Feb 2, 2017 · US
Spark plug
US12407148B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12407148-B2 |
| Application number | US-202218571546-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 12, 2022 |
| Priority date | Aug 2, 2021 |
| Publication date | Sep 2, 2025 |
| Grant date | Sep 2, 2025 |
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Abstract
Official abstract text for this publication.
A spark plug which is reduced in consumption of a discharge member, thereby having a longer service life. This spark plug is provided with: a first electrode that comprises a discharge member; and a second electrode that faces the discharge member, with a spark gap lying therebetween. The discharge member is mainly composed of Ru, while containing 0.5% by mass to 30% by mass of Ni or Co.
First claim
Opening claim text (preview).
What is claimed is: 1. A spark plug comprising: a center electrode including a base material and a discharge member at a tip of the base material, the discharge member covering a front end of the tip of the base material; and a ground electrode opposed to the discharge member with a spark gap therebetween, wherein the discharge member contains Ru as a main component, and not lower than 0.5% by mass and not higher than 30% by mass of Ni or Co. 2. The spark plug according to claim 1 , wherein the discharge member contains not lower than 5% by mass and not higher than 25% by mass of Ni or Co. 3. The spark plug according to claim 1 , wherein the discharge member is a sintered material, and wherein a density of the discharge material is not lower than 95%.
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Frequently asked questions
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- What does patent US12407148B2 cover?
- A spark plug which is reduced in consumption of a discharge member, thereby having a longer service life. This spark plug is provided with: a first electrode that comprises a discharge member; and a second electrode that faces the discharge member, with a spark gap lying therebetween. The discharge member is mainly composed of Ru, while containing 0.5% by mass to 30% by mass of Ni or Co.
- Who is the assignee on this patent?
- Niterra Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01T13/39. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 02 2025 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).