Glow plug with prestressed contact surfaces

Details Glow plug with prestressed contact surfaces Glow plug with prestressed contact surfaces

1994-10-17

1996-12-31

Jeffery, John A.

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219541, 361266, F23Q 700, H05B 310

Patent

active

055890911

ABSTRACT:
Glow plug with a metallic hollow body 1 in which a ceramic heating rod 2 is arranged such that it projects axially on one side of hollow body 1. The heating rod 2 is formed of a ceramic conductor 6 which is embedded in a ceramic insulator 7 and is connected to the power supply terminals, i.e., to ground via the metal of hollow body 1 and via a plug terminal 3. The contacts of the ceramic conductor 6 with the power supply terminals are formed by contact surfaces 8, 9 on the ceramic conductor 6, via which the conductor is in contact, on the one hand, with metallic hollow body 1, and with plug terminal 3, on the other hand. The contacts are preferably pressure loaded by generating a prestress between the components in contact. Preferably, metallic contact parts, for example, contact rings 10, 11, are provided at the contact points between the contact surfaces 8, 9 and the metallic hollow body 1 and plug terminal 3.

REFERENCES:
patent: 4312120 (1982-01-01), Comer
patent: 4418661 (1983-12-01), Esper et al.
patent: 4582981 (1986-04-01), Brooks et al.
patent: 5084607 (1992-01-01), Shafer et al.
patent: 5172664 (1992-12-01), Mueller et al.

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