Spark plug with ground electrode having mechanically locked...

Details Spark plug with ground electrode having mechanically locked... Spark plug with ground electrode having mechanically locked...

2007-03-13

2007-03-13

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

C313S118000, C313S143000

Reexamination Certificate

active

11322517

ABSTRACT:
A ground electrode for a spark plug has a through hole located adjacent a firing end of the electrode, with a precious metal firing tip extending through the hole. The firing tip is compressed axially to define a bulging portion extending radially outwardly from its longitudinal axis to mechanically retain the firing tip within the through hole. The firing tip additionally has an enlarged head or otherwise expanded portion at each axial end of the tip to provide a second mechanical interlock of the tip to the ground electrode. The firing tip can then also be welded to further strengthen its connection to the ground electrode. A method of manufacturing the ground electrode and a spark plug containing the ground electrode is also disclosed.

REFERENCES:
patent: 4023058 (1977-05-01), Lara et al.
patent: 4414483 (1983-11-01), Nishio et al.
patent: 4670684 (1987-06-01), Kagawa et al.
patent: 4743793 (1988-05-01), Toya et al.
patent: 4771210 (1988-09-01), Mohle et al.
patent: 5347193 (1994-09-01), Oshima et al.
patent: 5493171 (1996-02-01), Wood, III et al.
patent: 5510667 (1996-04-01), Loffler et al.
patent: 5982080 (1999-11-01), Shibata et al.
patent: 5998913 (1999-12-01), Matsutani
patent: 6078129 (2000-06-01), Gotou et al.
patent: 6337533 (2002-01-01), Hanashi et al.
patent: 6346766 (2002-02-01), Kanao et al.
patent: 6412465 (2002-07-01), Lykowski et al.
patent: 6533629 (2003-03-01), Boehler et al.
patent: 2001/0030494 (2001-10-01), Kanao
patent: 2001/0030495 (2001-10-01), Kanao et al.
patent: 2002/0074920 (2002-06-01), Chiu et al.
patent: 1 139 530 (2001-10-01), None
patent: 1 244 189 (2002-09-01), None
patent: WO 02/065601 (2002-08-01), None

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