Electric heating – Heating devices – Resistive element: igniter type
Reexamination Certificate
2005-12-27
2005-12-27
Evans, Robin O. (Department: 3742)
Electric heating
Heating devices
Resistive element: igniter type
C123S14500A
Reexamination Certificate
active
06979801
ABSTRACT:
A glow plug includes a cylindrical housing having an inward protrusion extending radially inwardly, a threaded portion for screwing the glow plug in an engine plug hole and a sealing portion in a front side of the male threaded portion for airtightly engaging the housing with a given portion of the plug hole, a sheath having a rear sheath end portion airtightly fixed in the housing, a heater disposed in the sheath, a center electrode disposed in the housing and having a front electrode end portion electronically connected with the heater and mechanically connected with the sheath and an outward protrusion protruding radially outwardly, and a combustion pressure sensor having a pressure-sensitive element arranged between a front surface of the inward protrusion and a rear surface of the outward protrusion to generate an electrical signal in response to variations in stress applied thereto.
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patent: 5922229 (1999-07-01), Kurano
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Fuma Tomohiro
Kondo Mitsuru
Okazaki Koji
Suzuki Takahiro
Evans Robin O.
Fastovsky Leonid M
NGK Spark Plug Co. Ltd.
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