Patent ID: 8143772
Filing Date: 2012-03-27
Classification: H01T

Abstract:
1. A spark plug for an internal combustion engine, comprising: a spark plug shell and an insulating body carrying said spark plug shell; a center electrode and at least one ground electrode disposed on said spark plug shell; said center electrode and said at least one ground electrode being encased by a chamber supported on said spark plug shell, and disposed within said chamber; a wall part of said chamber having a circular-ring-shaped cross section or being formed from a cylindrical ring; said at least one ground electrode having a support disposed on said spark plug shell and extending from said support; and said ground electrode support and each said at least one ground electrode extending therefrom being disposed at a spacing distance from an inner wall surface of said chamber; said ground electrode support having a circular-ring-shaped cross section viewed perpendicular to a longitudinal axis of the spark plug, or being formed by a cylindrical ring; two concentric, cylindrical end projections formed on said spark plug shell, said end projections including an inner end projection extending above an outer end projection in a direction of said chamber; and wherein said ground electrode support is placed on said inner end projection, and said wall part of said chamber is placed on said outer end projection.