The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2022
Filed:
Apr. 09, 2020
Applicant:
Federal-mogul Ignition Llc, Southfield, MI (US);
Inventors:
Shuwei Ma, Ann Arbor, MI (US);
Richard Keller, Whitehouse, OH (US);
Assignee:
FEDERAL-MOGUL IGNITION LLC, Southfield, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/06 (2006.01); H01T 21/02 (2006.01);
U.S. Cl.
CPC ...
H01T 13/06 (2013.01); H01T 21/02 (2013.01);
Abstract
A metal shell for a spark plug is made from a steel material that has increased carbon content and, in some embodiments, boron as well. The steel material is well-suited for extrusion because of its ductility, while maintaining requisite strength. The spark plug shell may have a reduced outer diameter (OD) at a crimped hot lock region, such as the case when the shell is used in smaller diameter spark plugs, such as M8 and M10 plugs. According to a non-limiting example, the spark plug shell steel material comprises 0.20-0.55 wt % carbon, inclusive.