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A shielding device for spark plugs which are oriented in an engine block by a key and keyway means such that the electrodes of the spark plug are located in a predetermined orientation in a combustion chamber in the engine. The spark plug is secured in place by a shielding enclosure to prevent radio

A shielding device for spark plugs which are oriented in an engine block by a key and keyway means such that the electrodes of the spark plug are located in a predetermined orientation in a combustion chamber in the engine. The spark plug is secured in place by a shielding enclosure to prevent radio frequency interference and also to provide an explosion-proof chamber around the spark plug. The shield of the spark plug is provided with an externally threaded section which is threadedly secured to a mating threaded section on the vehicle engine block. The shield is provided with an inner conical surface abutting against a shoulder on the body of the spark plug in order to axially force the plug into the engine block with shoulder to shoulder contact. The shield body is also provided with a plurality of wrenching flats enabling the shield body to be threadedly secured into the block and to press the plug into tight-fitting engagement with the engine block and thereby permit the spark plug electrodes to be located in the desired predetermined orientation in the engine block.

대표청구항 ▼

A separate and removable spark plug shield for use with a spark plug, said shield comprising: an elongated hollow body with a central bore sized to receive the body of a spark plug, said elongated body having an internal shoulder in said central bore facing an end of the elongated body for engagemen

A separate and removable spark plug shield for use with a spark plug, said shield comprising: an elongated hollow body with a central bore sized to receive the body of a spark plug, said elongated body having an internal shoulder in said central bore facing an end of the elongated body for engagement with the body of a spark plug, said elongated body having means cooperative with and securable to an engine for axially forcing said body of said plug toward said engine and clamping the body of said plug between said shoulder and the engine, and means at the other end of said body for connecting a shielded ignition wire to said body in contact with the plug.