Glow plug
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United States of America Patent
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-
Jun 3, 1986
Issued Date -
N/A
app pub date -
Jul 13, 1984
filing date -
Apr 8, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of making a glow plug includes the steps of swaging a sheath of a heater having an internal heating coil therein and a compressible washer at the open end of the sheath to reduce the sheath's diameter and to force some of the washer out of the sheath to leave a washer portion of a diameter larger than the swaged sheath diameter. The heater is force fitted into a housing with the external washer being press fitted against an internal bore wall of the housing to form an air-tight seal with the bore wall. This eliminates the usual brazing step of brazing the sheath to the housing to seal against flow of combustion gases therebetween.
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