Method of producing a rotationally oriented thread
US-2016303672-A1 · Oct 20, 2016 · US
Spark plug and assembling structure thereof
US9190812B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9190812-B2 |
| Application number | US-201214113390-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 9, 2012 |
| Priority date | Apr 28, 2011 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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A spark plug having a metallic shell extending along an axis (CL 1 ) and a solid annular gasket. The metallic shell has an externally threaded portion and a seat portion, and the gasket has an inside diameter smaller than the thread diameter of the externally threaded portion and is provided between the externally threaded portion and the seat portion. The forward end surface of the gasket has an inclined portion which inclines rearward with respect to the direction of the axis (CL 1 ) from the radially outer side toward the raidally inner side. The thickness of the gasket along the axis (CL 1 ) is 2.0 mm or less; the distance along the axis (CL 1 ) between the outermost circumferential edge and the innermost circumferential edge of inclined portion is 0.02 mm to 0.12 mm; and the Vickers hardness of the gasket is 60 Hv or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A spark plug comprising: a tubular metallic shell extending along an axis and a solid annular gasket made of metal and provided externally of an outer circumference of the metallic shell, the metallic shell having an externally threaded portion formed on an outer circumference of a forward portion thereof and a seat portion formed on a rear side of the externally threaded portion and protruding radially outward, and the gasket having an insi…
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- What does patent US9190812B2 cover?
- A spark plug having a metallic shell extending along an axis (CL 1 ) and a solid annular gasket. The metallic shell has an externally threaded portion and a seat portion, and the gasket has an inside diameter smaller than the thread diameter of the externally threaded portion and is provided between the externally threaded portion and the seat portion. The forward end surface of the gasket has …
- Who is the assignee on this patent?
- Miyashita Naomichi, Nakano Yuuichi, Ngk Spark Plug Co
- What technology area does this patent fall under?
- Primary CPC classification H01T13/08. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 17 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).