GLOW PLUG AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Issued Date -
Mar 19, 2015
app pub date -
Mar 6, 2013
filing date -
Mar 29, 2012
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A glow plug includes a cylindrical housing having an axial hole and provided with a screw portion, and a heater member which is inserted into the axial hole in a state where at least a front end portion thereof projects from a front end of the housing. The housing includes a pressure contact portion brought into pressure contact with a seat surface of an internal combustion engine when the screw portion is screwed into a mounting hole of the internal combustion engine, and a cylindrical front-end-side body portion provided between the pressure contact portion and the screw portion. The front-end-side body portion includes a holding portion which holds the heater member directly or indirectly at an inner circumference thereof, and the holding portion has a smallest outer diameter in the front-end-side body portion.
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