Electric lamp and discharge devices – Spark plugs – Particular electrode structure or spacing
Reexamination Certificate
2000-10-18
2003-06-24
Day, Michael H. (Department: 2879)
Electric lamp and discharge devices
Spark plugs
Particular electrode structure or spacing
C313S118000, C313S145000, C313S143000, C123S1690EB, C123S1690EL, C123S1690CL
Reexamination Certificate
active
06583538
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a spark plug with an electrically insulating ceramic insulator.
2. Description of the Related Art
In these conventional popular spark plugs with a spark gap in air malfunctions often occur due to fouling; they include restart and cold starting problems which due to low shunt resistance of the insulator base which is caused by electrically conductive combustion residues (carbon) lead to malfunction of the spark plug.
SUMMARY OF THE INVENTION
Therefore, the object of the invention is to make available a spark plug with cold starting properties which have been greatly improved, in which the aforementioned problems are greatly reduced.
The object in accordance with the invention is achieved by providing a spark plug with an electrically insulating ceramic insulator, a metallic spark plug body, a ground electrode and a middle electrode centrally located in a hole of the ceramic insulator, whereby a peripheral tip is formed around the ignition-side end area on the periphery of the middle electrode, the peripheral tip encompassing the middle electrode in an annular manner.
REFERENCES:
patent: 1192602 (1916-07-01), Bond
patent: 1216139 (1917-02-01), Kopf
patent: 1323932 (1919-12-01), Trautman
patent: 1332904 (1920-03-01), Kulick
patent: 1350319 (1920-08-01), Longworth
patent: 3883762 (1975-05-01), Harris et al.
patent: 5569971 (1996-10-01), Clifford et al.
patent: 5877584 (1999-03-01), Kato et al.
patent: 572 446 (1924-06-01), None
patent: 113 774 (1918-03-01), None
patent: 04-249877 (1992-09-01), None
Examiner: E. Bijn, European Search Report, Date of Search: Jan. 17, 2001, pp.: 3, Place of Search: Den Haag.
Adolf Manfred
Niessner Werner
Beru AG
Day Michael H.
Nixon & Peabody LLP
Perry Anthony
Safran David S.
LandOfFree
Spark plug does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spark plug, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spark plug will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3146310