| Patent application number | Description | Published |
|---|
| 20080238282 | METHOD FOR PRODUCING SPARK PLUG AND SPARK PLUG - A spark plug ( | 10-02-2008 |
| 20090085304 | GASKET AND AUTOMOTIVE COMPONENT - A gasket for use around a thread neck of an automotive component, the gasket dimensioned to prevent the gasket from falling off of the thread neck and to prevent a male screw portion from biting into the gasket. | 04-02-2009 |
| 20100117506 | SPARK PLUG - A spark plug comprised of a spark plug main body and a cylindrical pressing member used for mounting the spark plug main body on an internal-combustion engine. The spark plug main body includes a cylindrical metal shell. A removing-tool engagement portion is formed on an outer circumferential face of the metal shell at a front end side of a caulking portion. The removing-tool engagement portion is used for engaging with a tool, when removing the spark plug main body from a plug hole of an internal-combustion engine. | 05-13-2010 |
| 20100242888 | SPARK PLUG FOR INTERNAL COMBUSTION ENGINE - In a spark plug having a precious metal tip joined to the front end portion of a ground electrode, the stable junction state of the precious metal tip is guaranteed for a long time. A precious metal tip | 09-30-2010 |
| 20100264796 | SPARK PLUG - There is provided a spark section ( | 10-21-2010 |
| 20100264823 | SPARK PLUG - A spark plug with excellent vibration resistance performance and resistor load life-span characteristics, and a reduced diameter which is achieved by strengthening adhesion between a resistor and a conductive glass sealing layer. | 10-21-2010 |
| 20100275869 | SPARK PLUG FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SAME - A spark plug capable of preventing a separation of a noble metal tip and capable of extending a service-life of the spark plug. | 11-04-2010 |
| 20100289398 | METHOD FOR PRODUCING SPARK PLUG AND SPARK PLUG - A spark plug ( | 11-18-2010 |
| 20110018422 | SPARK PLUG - When an insulator of a spark plug receives an external force in a bending direction perpendicular to an axis at a rear end side body portion, a position C where the insulator is supported by a crimping portion via a packing acts as a fulcrum, and a stress is applied between the position C and a position B where the insulator is supported by a ledge portion via a packing. When an insulator is designed in which the balance of size and modulus of section is adjusted so that τA which denotes a proof strength against bending between a rear end position A of the insulator and the position C and τB which denotes a proof strength against bending between the position B and the position C satisfy 0.71≦τA/τB≦1.27, cracks can be prevented. | 01-27-2011 |
| 20110025185 | SPARK PLUG - A spark member ( | 02-03-2011 |
| 20110045731 | METHOD OF PRODUCING A SPARK PLUG - To provide a method of producing a spark plug in which a spark discharge gap with a suitable distance can easily be obtained without bending to deform a ground electrode in a direction in which the ground electrode moves towards or away from a metal tip of a center electrode, in the method of producing a spark plug, when a metal tip (a noble metal tip) | 02-24-2011 |
| 20110163653 | SPARK PLUG - A spark plug includes a cylindrical metal shell; a cylindrical insulator that is held in the metal shell; a center electrode; and a ground electrode that comprises a ground electrode main body part and a noble metal tip, a spark discharge gap being formed between the leading end of the center electrode and the noble metal tip wherein at least a portion of the ground electrode main body part, to which the noble metal tip is joined, is made of Ni alloy containing 12 to 35 mass % of Cr, 7 mass % or less of Fe, 0.5 to 5 mass % of Al, 0.3 to 5 mass % of Si and 50 mass % or more of the balance, and wherein the joined portion and the noble metal tip are joined by laser welding or electron beam welding. | 07-07-2011 |
