SPARK PLUG
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
N/A
app pub date -
Nov 22, 2017
filing date -
Nov 29, 2016
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A cylindrical metal shell extending in an axis direction has a seat portion projecting radially outward, and an annular gasket is disposed so as to oppose a front end surface of the seat portion. A value G/S obtained by dividing an arithmetic average roughness G of a first surface, of the gasket, which comes into contact with the front end surface of the seat portion by an arithmetic average roughness S of the front end surface of the seat portion satisfies 0.5≤G/S≤2.0. The arithmetic average roughness G is not more than 0.16 μm, and an average of an area of a second surface on a back side of the first surface and an area of the first surface is not more than 280 mm2.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully