Spark plug with receiving end of ground elbow set above discharge terminal of central electrode and located by one side of central electrode extension line
AssigneeTop 1 Green Development Co., Ltd.
InventorJen-Chun Poe
Life of this patent
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Abstract
A spark plug include an insulator, a central electrode, which is in the form of a bar received in the insulator, a metal case, which surrounds the insulator and is grounded, and a ground elbow fixed to the metal case. The central electrode includes a discharge terminal exposed outside the insulator and defining an extension line as an imaginary line extending from the discharge terminal along a central axis of the central electrode. The ground elbow has a connection end and an opposite, sharp-tip-like receiving end. The connection end is fixed to the metal case. The receiving end is set close to but spaced from the discharge terminal and is locate by one side of the extension line.
Claims8
A spark plug, comprising:
- an insulator;
- a central electrode, which is in the form of a bar received in the insulator and comprising an end face located outside the insulator for forming a discharge terminal, an extension line being defined as a line extending from the end face of the central electrode along a central axis of the central electrode;
- a metal case, which surrounds the insulator and is grounded;
- and
- at least one ground elbow, which has a connection end and an opposite, sharp-tip-like receiving end, the connection end being fixed to the metal case, the receiving end being set close to but spaced from the end face of the central electrode, wherein the receiving end of the ground elbow is set above the end face of the central electrode in a partly overlapping fashion and located by one side of the extension line.
Dependencies are inferred from the claim text.