Glow plug with heat range indicative color

Details Glow plug with heat range indicative color Glow plug with heat range indicative color

2007-04-17

2007-04-17

Evans, Robin (Department: 3742)

Electric heating

Heating devices

Resistive element: igniter type

C219S541000, C219S544000, C123S14500A, C123S14500A

Reexamination Certificate

active

10965443

ABSTRACT:
A glow plug having a heat range indicated by a colored insulating ring. The insulating ring, along with first and second washers, insulates a central electrode from a glow plug body. Electrical insulation is provided by anodizing the insulating ring. A colored anodizing is used on the insulating ring which is visible from the top of the glow plug, which colored anodizing is indicative of the heat range of the glow plug.

REFERENCES:
patent: 2030937 (1936-02-01), Reichmann
patent: 4620512 (1986-11-01), Brooks et al.
patent: 5486283 (1996-01-01), Mnich
patent: 6346688 (2002-02-01), O'Donnell
patent: 6696670 (2004-02-01), O'Donnell
patent: 01095221 (1989-04-01), None
Duratrax catalog , Sep. 2001.
MIL-A-8625F, Sep. 1993.

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