Patent · US Expired

Spark plug electrode including a profiled noble-metal part

US6630771B1 · kind B1 · utility

6Cited by

3References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Heinz Ulm · Gräfenberg, DE
Rainer Kocik · Charleston, US
Stephan Weigel · Thurnau, DE
Jochen Fischer · Whitehall, US
Peter Metzler · Stegaurach, DE
Detlef Hartmann · Bamberg, DE

Key dates

Filing date	Feb 23, 2001
Grant date	Oct 7, 2003
Priority date	—
Expiry date	Feb 23, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/39
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A spark plug electrode having a welded-on noble-metal part for a longer service life of the spark plug. Prior to the welding process, the noble-metal part is provided with a profiling on the side facing the spark plug electrode.

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