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| Number | Title | Issue Date |
| 8146555 | Direct-injection spark-ignition system A spark plug includes a center electrode substantially aligned with a longitudinal first axis and a surface-gap ground electrode radially aligned with the center electrode along a surface-gap electrode second axis substantially orthogonal to the longitudinal first a... | 04/03/2012 |
| 8082897 | Plasma jet ignition plug and ignition device for the same The cavity of a plasma jet ignition plug is configured in a stepped shape; i.e., composed of a constricted portion and a diameter-increased portion (65). The inner diameter (B) of the constricted portion is made smaller than the inner diameter (A) of the diam... | 12/27/2011 |
| 7866294 | Electrode for an ignition device An electrode for an ignition device formed from a dilute nickel alloy with improved resistance to high temperature oxidation, sulfidation, corrosive wear, deformation and fracture. The electrode includes at least 90% by weight of nickel; zirconium; boron and at leas... | 01/11/2011 |
| 7823556 | Electrode for an ignition device An electrode for an ignition device is made from a Ni-based nickel-chromium-iron alloy which has improved resistance to high temperature oxidation, sulfidation, corrosive wear, deformation and fracture includes, by weight of the alloy: 14.5-25% chromium; 7-22% iron;... | 11/02/2010 |
| 7707985 | Electrode for an ignition device An electrode for an ignition device formed from a dilute nickel alloy with improved resistance to high temperature oxidation, sulfidation, corrosive wear, deformation and fracture. The electrode includes at least 90% by weight of nickel; zirconium; boron and at leas... | 05/04/2010 |
| 7628130 | Ignition spark plug An ignition plug is disclosed which includes a hollow main cell having a bendable extension part and a primary combustion chamber, an insulator mounted in the main cell, to insulate a terminal rod centrally embedded in the main cell, a central electrode having a fir... | 12/08/2009 |
| 7395793 | Ignition system for an internal combustion engine An ignition system for an internal combustion engine, having a combustion chamber and a fuel injection device which injects a fuel directly into the combustion chamber in stream-guided fashion, is configured so that the ignition system has a positive polarity. ... | 07/08/2008 |
| 7385339 | Ignition device having a reflowed firing tip and method of making A sparkplug having ground and center electrodes that include a firing tip formed from a noble metal or noble metal alloy by reflowing of a noble metal preform. The present invention also includes a method of manufacturing a metal electrode having an ignition tip for... | 06/10/2008 |
| 7382084 | Spark plug having a precious metal tip An object of the invention is to provide a spark plug having a discharge portion made of a precious metal tip, in which peeling of the precious metal tip from a surface of the discharge portion can be suppressed while spark abrasion, oxidation abrasion and abnormal ... | 06/03/2008 |
| 7368864 | Spark plug A spark plug including: an insulator having an axial hole; a center electrode disposed in a tip end side of the axial hole of the insulator; a metal shell surrounding the insulator, a first ground electrode having one end bonded to the metal shell; a noble metal tip... | 05/06/2008 |
| 7347174 | Combustion promoting device for internal combustion engine Disclosed is a combustion promoting device for an internal combustion engine which derives high combustion efficiency and high power from the internal combustion engine. The combustion promoting device is provided with a combustion promotion inductor formed of a sup... | 03/25/2008 |
| 7323811 | Noble metal tip for spark plug electrode and method of making same A noble metal tip 20 for attachment to a spark plug center electrode 36 and/or a ground electrode. Noble metal tip 20 is a generally cylindrical component that includes a firing end 40, an attachment end 42, and one or more retenti... | 01/29/2008 |
| 7293541 | Combustion-type power tool having ignition proof arrangement A spark is shot between an ignition point of an ignition plug and an ignition ground. The spark is shot from an acute corner of a core of the ignition plug. A tip end of the core has an acute angle of not more than 45 degrees. With this arrangement, an emitting poin... | 11/13/2007 |
| 7291961 | Spark plug having a specific structure of noble metal tip on ground electrode A method for producing a spark plug, the spark plug including: a center electrode; an insulator which holds the center electrode therein in a state where a tip end portion of the center electrode protrudes therefrom; a metal shell which holds the insulator therein; ... | 11/06/2007 |
| 7288879 | Spark plug having ground electrode including precious metal alloy portion containing first, second and third components A spark plug including: a cylindrical metal shell; a cylindrical insulator fixed to the metal shell; a center electrode having its leading end protruding from a leading end of the insulator and its trailing end fixed to the insulator; and a ground electrode having o... | 10/30/2007 |
| 7282844 | High performance, long-life spark plug A spark plug includes a metal shell, an insulator, a center electrode, a ground electrode, a first noble metal chip, and a second noble metal chip. The metal shell has a threaded portion with an outer diameter of equal to or less than 14 mm for installing the spark ... | 10/16/2007 |
| 7267116 | Spark plug and ignition apparatus using same A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending... | 09/11/2007 |
| 7259506 | Spark plug with perpendicular knife edge electrodes A spark plug has an elongated body of substantially circular cross-section with a center axis. A wedge shaped center electrode extends from one end of the body and a wedge shaped ground electrode is arranged in close proximity to the center electrode. Each of the el... | 08/21/2007 |
| 7256533 | High electrical stiction spark plug A spark plug includes a sparking electrode with a firing tip, and a ground electrode having an elongated member extending outwardly from the sleeve. The elongated member has an inner surface defining a generally circular hole. The inner surface forms a circle dispos... | 08/14/2007 |
| 7250711 | Spark plug with increased durability and carbon fouling resistance A spark plug for an internal combustion engine is provided which includes a metal shell, a porcelain insulator, a center electrode, a main ground electrode, and auxiliary ground electrodes. Each of the auxiliary ground electrodes has an inner side surface facing the... | 07/31/2007 |
| 7230369 | Spark plug A spark plug includes a metal shell, an insulator, a center electrode, a ground electrode, and a terminal fixed to the insulator. The dimensional parameters in the structure of the spark plug, such as a maximum diameter A of the terminal and a diameter B of the insu... | 06/12/2007 |
| 7190106 | Spark plug with ground electrode having mechanically locked precious metal feature A ground electrode for a spark plug has a through hole located adjacent a firing end of the electrode, with a precious metal firing tip extending through the hole. The firing tip is compressed axially to define a bulging portion extending radially outwardly from its... | 03/13/2007 |
| 7150252 | Spark plug and internal combustion engine equipped with the spark plug In a spark plug 100, the nickel content of a center electrode 20 is greater than that of a ground electrode 30. This enhances resistance to spark-induced consumption of the center electrode 20. Also, the ground electrode 30 to whic... | 12/19/2006 |
| 7116041 | Spark electrode assembly A spark electrode assembly has an elongate electrode with an inner insulator arranged for operable attachment to a support structure. The inner insulator surrounds the electrode with one end of the electrode positioned adjacent a ground element across a spark gap an... | 10/03/2006 |
| 7109646 | Spark plug having center electrode with columnar portion and conical portion A spark plug is composed of a main metal fitting having a cylindrical structure, an insulator disposed inside the cylindrical main metal fitting, a center electrode fitted in the insulator in a manner that a front end portion of the center electrode projects outward... | 09/19/2006 |
| 7105990 | Spark plug for internal combustion engine Carbon fouling adhered on an insulator tip of a spark plug of the present invention is burnt down by a leak current during an inductive discharge period, due to a promoted ionization before beginning a capacitive discharge, in such an arrangement of a central electr... | 09/12/2006 |
| 7086363 | Spark plug and ignition apparatus using same A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending... | 08/08/2006 |
| 7059926 | Method of making a spark plug having a multi-tiered center wire assembly A method of making an ignition device and center wire assembly that includes first, second and third electrode members, a conductive seal, and a noise suppressing seal. The method locates the first electrode member at an axial end of the center wire assembly near a ... | 06/13/2006 |
| 7045939 | Spark plug having a welded electrode and the method of producing the same A spark plug used in an automotive internal combustion engine. The spark plug includes a center electrode. An insulator is disposed around the center electrode. A metal main body is disposed around the insulator. A ground electrode has a first end section connected ... | 05/16/2006 |
| 7021275 | Igniter for internal combustion engines operating over a wide range of air fuel ratios An igniter for ignition over a wide air/fuel ratio range. Igniter includes an igniter body including an internal cavity disposed substantially within the igniter body, an internal spark gap disposed substantially within the internal cavity, an external spark gap dis... | 04/04/2006 |
| 7019448 | Spark plug having a multi-tiered center wire assembly A spark plug center wire assembly that includes a noise suppressing conductive seal with improved isolation of the seal from the heat generated at the firing end of the spark plug. The center wire assembly includes a firing electrode, a conductive glass seal, an int... | 03/28/2006 |
| 7007653 | Robust torch jet spark plug electrode A composition for forming an electrode for use in a torch jet spark plug is provided. The composition comprises a ceramic material, ceramic particles, and an electrically conductive material. The ceramic particles are dispersed within the ceramic material. At least ... | 03/07/2006 |
| 6992426 | Spark plug of an internal combustion engine A spark plug of an internal combustion engine, in particular for use in Otto-cycle gas engines, having an insulator body, at least one fixed ground electrode carrier arrangement and at least one fixed central electrode carrier, wherein a spark plug housing having at... | 01/31/2006 |
| 6923699 | Method of making a spark plug A method of making a spark plug having a noble metal chip joined to an electrode main body of a ground electrode by interposing therebetween an intermediate member. The method comprises the steps of prior to joining the noble metal chip to the electrode main body, j... | 08/02/2005 |
| 6885135 | Spark plug and its manufacturing method Noble metallic tips, made of a Pt alloy or an Ir alloy, are fixed to electrode base materials. The electrode base materials are an alloy containing a chief element selected from the group consisting of Ni, Fe, and Co and a plurality of additive elements. At least tw... | 04/26/2005 |
| 6858975 | Spark plug having an oil film on an intermediate portion of the insulator or intermediate portion of the metallic shell In a spark plug for an internal combustion engine oil is applied onto at least either the surface of an intermediate body portion of an insulator or the surface of an intermediate hole portion of a metallic shell, thereby forming an oil film. Since the oil film has ... | 02/22/2005 |
| 6807933 | Multiple sparking ignition device The ignition system of the present invention involves the forming of multiple ignition sparks within the fuel-burning chamber of an internal combustion engine during each cylinder combustion cycle through electrical current flow through a plurality of electrodes fun... | 10/26/2004 |
| 6796299 | Ignition system for internal combustion engine and ignition method of fuel charged in a fuel chamber A grounding electrode 20 is electrically grounds, and a center electrode 10 to which high voltage pulse is applied that an end of the grounding electrode 20 and an end of the center electrode 10 are disposed closely. The grounding electro... | 09/28/2004 |
| 6794802 | Spark plug for an internal combustion engine and method for producing a spark plug The seal between the insulator and the center electrode is to be improved in a spark plug for an internal combustion engine comprising a shell (12), an insulator (16) located in the shell and composed of a sintered ceramic material, as well as a center... | 09/21/2004 |
| 6791246 | Spark plug and method for its manufacture A method for manufacturing spark plugs with central and body electrode(s) armed with noble metal inserts, in which the tip of a central electrode which is pyramid or conic shaped with a base diameter (d), is liquefied by being pressed against a noble metal ball with... | 09/14/2004 |
