Patent · US Expired

Spark plug for an internal combustion engine

US5818152A · kind A · utility

3Cited by

4References

1Claims

0Family size

Assignee

General Motors LLC · US

Inventors

Gunter Bolduan · Langen (Hessen), DE
Dittmar Klett · Freiberg am Neckar, DE
Jurgen Wurth · Heilbronn, DE
Oswald Glaser · Neuffen, DE
Hermann Kersting · Oelde, DE
Roland Muller · Weiling, DE

Key dates

Filing date	Jan 24, 1996
Grant date	Oct 6, 1998
Priority date	—
Expiry date	Jan 24, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/467
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A spark plug for an internal combustion engine comprising: a cylindrical metal tube; a rod-shaped central electrode within the cylindrical metal tube; a tubular insulator within which the rod-shaped central electrode is located, wherein the tubular insulator is arranged substantially centrally in and substantially coaxially with the cylindrical metal tube; and at least two ground electrodes affixed to the cylindrical metal tube, wherein the at least two ground electrodes are each bent toward the metal electrode, wherein each ground electrode together with the central electrode forms a different member of a set of spark paths comprising: (i) an air sliding spark path, (ii) and air-air sliding spark path and (iii) an air spark path.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.