Glow plug

Details Glow plug Glow plug

1984-07-13

1986-06-03

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Electrical device making

29613, H05B 330

Patent

active

045921342

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.

REFERENCES:
patent: 2367445 (1945-01-01), Stoltenberg
patent: 2861162 (1958-11-01), Van Inthoudt
patent: 3434461 (1978-05-01), Beesch
patent: 4087904 (1978-05-01), Steinke et al.
patent: 4112577 (1978-09-01), Mann
patent: 4200077 (1980-04-01), Kauhl et al.
patent: 4211204 (1980-07-01), Glauner et al.
patent: 4252091 (1981-02-01), Steinke
patent: 4314401 (1982-02-01), Saku

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