Electric lamp and discharge devices – Spark plugs – Particular electrode structure or spacing
Reexamination Certificate
2011-07-05
2011-07-05
Patel, Vip (Department: 2889)
Electric lamp and discharge devices
Spark plugs
Particular electrode structure or spacing
C313S118000
Reexamination Certificate
active
07973459
ABSTRACT:
A spark plug having a particular firing end configuration that satisfies numerous dimensional ranges for improved performance. The spark plug generally includes a shell, an insulator, and center and ground electrodes, with the electrodes each having a copper core for improved thermal conductivity and a noble metal insert for improved erosion and corrosion resistance. The noble metal insert for the center electrode is preferably in the form of a cylindrical Ir-based tip, which is received within a complimentary recess formed in the center electrode. The noble metal insert for the ground electrode is in the form of a flat Pt-based pad attached to a surface of the ground electrode. Various dimensional ranges are provided for the various components of the spark plug assembly, both individually and in combination with other dimensions.
REFERENCES:
patent: 2296033 (1941-01-01), Heller
patent: 4700103 (1987-10-01), Yamaguchi et al.
patent: 4845400 (1989-07-01), Takamura et al.
patent: 5124612 (1992-06-01), Takamura et al.
patent: 5159232 (1992-10-01), Sato et al.
patent: 5347193 (1994-09-01), Oshima et al.
patent: 5440198 (1995-08-01), Oshima et al.
patent: 5514929 (1996-05-01), Kawamura
patent: 5873338 (1999-02-01), Matsubara et al.
patent: 5877584 (1999-03-01), Kato et al.
patent: 5929556 (1999-07-01), Matsubara et al.
patent: 5990602 (1999-11-01), Katoh et al.
patent: 6093071 (2000-07-01), Osamura et al.
patent: 6094000 (2000-07-01), Osamura et al.
patent: 6147441 (2000-11-01), Osamura
patent: 6262522 (2001-07-01), Osamura et al.
patent: 6265816 (2001-07-01), Ito et al.
patent: 6528929 (2003-03-01), Matsutani et al.
patent: 6548945 (2003-04-01), Tamura
patent: 6552476 (2003-04-01), Hanashi et al.
patent: 6653768 (2003-11-01), Kato et al.
patent: 6707237 (2004-03-01), Teramura et al.
patent: 7109646 (2006-09-01), Morita et al.
patent: 7569978 (2009-08-01), Tinwell
patent: 2003/0071552 (2003-04-01), Teramura et al.
patent: 479540 (1938-02-01), None
patent: 09-219274 (1997-08-01), None
patent: 2000243535 (2000-09-01), None
patent: 2002-359051 (2002-12-01), None
patent: 2003-142224 (2003-05-01), None
patent: 2004006250 (2004-01-01), None
patent: 2000-243535 (2009-09-01), None
Japanese Office Action for Japanese Patent Appln. No. 2006-551956, dated Jun. 22, 2010, 7 pages.
Japanese Office Action for Japanese Patent Appln. No. 2006-551956, dated Mar. 15, 2011, 4 pages.
Petition for Prior Art Submission, submitted Feb. 2, 2011 to the Japanese Patent Office, 3 pages.
Federal-Mogul Ignition (U.K.) Limited
Patel Vip
Reising Ethington P.C.
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