Patent ID: 8125130
Filing Date: 2012-02-28
Classification: H01T

Abstract:
1. A spark plug comprising: (a) a central electrode having a proximal portion and a distal portion, the distal portion having a circular cross section with a longitudinal axis and terminating in a distal end; (b) a plurality of peripheral electrodes, each peripheral electrode having a lower portion and an upper portion and being substantially identical in shape and dimensions, each upper portion having a distal-most point, each distal-most point being disposed in a central plane within which the longitudinal axis of the distal portion of the central electrode is wholly disposed, the cross-section of each upper portion taken along its central plane defining a convex outer side and a non-convex inner side, each convex outer side having a curved surface which is tangent to a plurality of tangent planes, all of which tangent planes intersect the longitudinal axis of the distal portion of the central electrode at points at or above the distal end of the distal point of the central electrode.