Ignition coil for internal combustion engine
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United States of America Patent
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Issued Date -
May 30, 2019
app pub date -
Nov 29, 2018
filing date -
Nov 29, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
An ignition coil has primary and secondary coils, a coil casing having a casing body, an accommodating part and a high voltage tower shaped part of a cylindrical shape, a resistance member arranged as a movable member in a tower through hole of the high voltage tower, a high voltage cap, and an insulation resin member with which the accommodating part is filled. A proximal end part of the tower through hole has an inner diameter which is greater than an outer diameter of a maximum outer diameter part of the resistance member. A distal end part of the tower through hole has an inner diameter which is less than the outer diameter of the maximum outer diameter part of the resistance member. A vent part is formed, through which the proximal end part of the tower through hole communicates with the distal end part of the tower through hole.
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