Spark plug with replaceable ground electrode

Details Spark plug with replaceable ground electrode Spark plug with replaceable ground electrode

1996-08-27

1999-09-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313123, 313122, 313128, H01T 1320, H01T 1324, H01T 1346, H01T 1314

Patent

active

059558270

ABSTRACT:
An internal combustion engine spark plug having an inside annular groove at the end of its shell that accommodates a replaceable ground electrode that consists of a circular wire of durable metal that fits the annular groove and having ends that are pre-formed to terminate adjacent to the peripheral edge of the center electrode providing a double spark gap.

REFERENCES:
patent: 1489454 (1924-04-01), Osterhout
patent: 2292216 (1942-08-01), Doran
patent: 2894162 (1959-07-01), Ignatjev
patent: 3790842 (1974-02-01), Westenkirchner
patent: 4268774 (1981-05-01), Forkum, Jr.
patent: 4659960 (1987-04-01), Toya et al.
patent: 5121026 (1992-06-01), Patrician
patent: 5132587 (1992-07-01), Lemelson
patent: 5408961 (1995-04-01), Smith
patent: 5430346 (1995-07-01), Johnson
patent: 5430396 (1995-07-01), Johnson
patent: 5581145 (1996-12-01), Kato et al.
patent: 5612586 (1997-03-01), Benedikt et al.

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