Electric lamp or space discharge component or device manufacturi – Process – Spark plug or spark gap making
Reexamination Certificate
2010-02-09
2011-10-11
Patel, Nimeshkumar (Department: 2879)
Electric lamp or space discharge component or device manufacturi
Process
Spark plug or spark gap making
C445S001000
Reexamination Certificate
active
08033880
ABSTRACT:
A method for manufacturing a spark plug which includes: (a) preparing a metal shell; (b) preparing an insulator; (c) inserting the insulator in an insertion hole of the metal shell; (d) forming an intended crimping portion of the metal shell into a crimping portion; and (e) pressing a lower side portion of the metal shell closer to a position lower than the intended compressive deformation portion, and pressing the crimping portion of the metal shell in an axial direction to compressively deform the intended compressive deformation portion of the metal shell and thus seal a space between a stepped portion of the metal shell and a stepped portion of the insulator, wherein step (e) controls a pressing amount of a press in a constant value from the start of compressive deformation to the end thereof.
REFERENCES:
patent: 4871339 (1989-10-01), Sadegh
patent: 6538365 (2003-03-01), Nasu et al.
patent: 2002/0041135 (2002-04-01), Fukushima
patent: 2002/0193033 (2002-12-01), Nasu et al.
patent: 2007-141868 (2007-06-01), None
Musasa Mamoru
Nakamura Mai
Suzuki Akira
NGK Spark Plug Co. Ltd.
Patel Nimeshkumar
Sughrue & Mion, PLLC
Zimmerman Glenn
LandOfFree
Method for manufacturing 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 Method for manufacturing spark plug, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing spark plug will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4301163