| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 313141000 |
Particular electrode structure or spacing
| 303 |
| 313143000 |
Shaped electrode chamber, insulator end, shell skirt, baffle or gas directing means
| 38 |
| 313144000 |
With specific joint structure
| 23 |
| 313135000 |
With particular connector structure
| 14 |
| 313120000 |
With fluid feed or air vent
| 8 |
| 313140000 |
Plural parallel gaps (e.g., main and standby, serrated electrode)
| 7 |
| 313139000 |
Ring or disk electrode (e.g., sector)
| 6 |
| 313130000 |
Non-conducting material in or adjacent gap (e.g., restricts spark) | 4 |
| 20090021133 | PLASMA IGNITION SYSTEM - A plasma ignition system includes an ignition plug attached to an engine and a high-voltage supply. The plug includes a center electrode serving as a positive pole, a ground electrode serving as a negative pole, and an insulating member insulating the center electrode from the ground electrode and defining a discharge space therein. At least a part of a surface of the center electrode faces the space, and at least a part of a surface of the ground electrode faces the discharge space. The plug puts gas in the space into a plasma state and injects the gas into the engine as a result of application of high voltage and supply of a large current to the plug by the high-voltage supply. The center electrode has a recess portion opposed to the space and recessed in a direction opposite to an injection direction. | 01-22-2009 |
| 20090033194 | PLASMA-GENERATING PLUG - The invention relates to a plasma-generating spark plug which undergoes excitation in the radio frequency domain. The invention comprises at least one first metallic electrode ( | 02-05-2009 |
| 20100314987 | SPARK PLUG - A spark plug is such that a front end portion of an insulating member projects 2 mm or larger from a front end face of a metal shell and a volume of a portion of the insulating member which lies within a range from a front end of the insulating member to a position lying 1 mm towards a rear end side from the front end is 11 mm | 12-16-2010 |
| 20150069902 | SPARK PLUG - A spark plug includes an insulator, a terminal electrode, a center electrode, a resistor, and a glass seal layer. The terminal electrode has: a recess part opened to the front end side and having a depth in a center axis direction of the terminal electrode; and a flat part neighboring the recess part at its outer circumference side. The relationship 0.52≦B/A≦0.91 is satisfied, wherein A (mm | 03-12-2015 |
| 313134000 |
With radio shielding | 3 |
| 20100187968 | IGNITION PLUG AND ANALYSIS SYSTEM - There is provided an ignition plug whereby an electrical configuration for discharge and an electrical configuration for guiding and radiating microwaves are provided concomitantly, within dimensions permitting installation in an installation space for an ordinary ignition plug, and adapted to efficiently guide and transmit microwaves into a combustion chamber. The ignition plug comprises a center electrode and a ground electrode for spark discharge; a center wire and an outside conductor forming a coaxial electromagnetic wave transmission line; and a microwave radiation antenna that is electrically integrated with the center wire; the microwave radiation antenna having a profile that defines part of a sphere or arc including a plurality of locations substantially equidistant from the center electrode. | 07-29-2010 |
| 20110037371 | Spark plug - The present invention provides a technique of suppressing the generation of radio noise in a spark plug, wherein a high dielectric constant fixation-assisting member, formed of a high dielectric constant material which is higher in dielectric constant than alumina, is provided between a metallic shell and a second conductive portion CP | 02-17-2011 |
| 20180026427 | PROTECTIVE SLEEVE FOR A CORONA IGNITOR IN A SPARK PLUG SHAFT OF AN ENGINE | 01-25-2018 |
| 313136000 |
Plural part center electrode lead-in | 2 |
| 20090127996 | IRIDIUM ALLOY FOR SPARK PLUG ELECTRODES - A spark plug comprises a shell having a substantially cylindrical threaded portion for threadable engagement in a cylinder head of an internal combustion engine, an insulator disposed coaxially in the shell, a center electrode disposed coaxially in the insulator, a side ground electrode having a first end coupled to the shell and a second end facing an end of the center electrode to define a spark discharge gap therebetween, and an electrode tip portion secured to either the side ground electrode or the center electrode proximate the spark discharge gap. The tip portion is formed from an alloy comprising from about 60 to about 70 percent by weight iridium, from about 30 to about 35 percent by weight rhodium, from 0 to about 10 percent by weight nickel, from about 3500 to about 4500 parts per million tantalum, and from about 100 to about 200 parts per million zirconium. | 05-21-2009 |
| 20120056522 | Corona ignition device and method for its manufacture - The invention relates to an ignition device for igniting fuel in an internal combustion engine by means of a corona discharge, comprising an ignition electrode, an outer conductor which surrounds the ignition electrode and has a forward end and a rear end, and an electrical insulator which is arranged between the ignition electrode and the outer conductor, wherein the insulator and the ignition electrode project beyond the forward end of the outer conductor in longitudinal direction and the ignition electrode comprises a plurality of electrode branches which each start from a base point, wherein the insulator extends beyond the base points in longitudinal direction. According to the invention an end surface of the electrode branches is uncovered. | 03-08-2012 |
| 313133000 |
Ball electrode | 2 |
| 20100187967 | SPARK PLUG ELECTRODE AND METHOD OF MAKING - A method of manufacturing a center electrode for a spark plug, the method including the steps of: resistance welding a sphere of a noble metal to a center electrode of a spark plug to provide a center electrode with an electrode tip that has a tip portion of a first configuration, the first configuration having a first height and a first width; and shaping the tip portion after the sphere is welded to the center electrode by a process wherein the tip portion will have a second configuration having a second height and a second width, the second height being greater than the first height and the second width being less than the first width wherein a peripheral edge of the noble metal is flush with a peripheral edge of the material it is secured to. | 07-29-2010 |
| 20150102719 | PLASMA IGNITION PLUG FOR AN INTERNAL COMBUSTION ENGINE - A plasma ignition plug for an internal combustion engine has a thorium alloyed tungsten anode separated from a vanadium- or beryllium-alloyed copper cathode by a boron nitride ceramic powder insulator. A generally semi-spherical titanium emitter is electrically coupled to the anode and disposed within an end of the insulator so as to form an annular gap with a torus on the end of the cathode. The surface of the emitter protrudes slightly beyond the rim of the torus on the cathode. High amplitude pulses driven into the anode arc across the annular gap to the cathode at more than twenty-four spots simultaneously, generating a plasma ignition front. | 04-16-2015 |
| 313122000 |
Removable electrode on shell | 1 |
| 20120176018 | SPARK PLUG ASSEMBLY - A spark plug assembly has a spark plug with an inner conductor, an outer conductor and an intervening insulator. A quick-change adapter is receivable in the spark plug hole of an internal combustion engine, and the spark plug is removably received in the adapter. Gas seal rings may be provided about the spark plug outer surface. Indexing marks may be provided on the adapter and the spark plug to angularly align the spark plug conductor gap to a desired angular position. The spark plug may be formed with an extension. | 07-12-2012 |
| 313137000 |
Plural part insulating means | 1 |
| 20090256461 | CERAMIC SPARK PLUG INSULATOR AND METHOD OF MAKING - An insulator for a spark ignition device is disclosed which includes an electrically insulating ceramic core tube having a terminal end, a firing end and an inner bore which extends along a longitudinal bore axis from the terminal end to the firing end and an electrically insulating, ceramic core nose tube having a second outer surface and a second bore where the second outer surface of said ceramic core nose tube is in nested engagement with and directly bonded to the bore of the ceramic core tube proximate the firing end. The insulator also may include a similarly nested and directly bonded shoulder tube on an outer surface of the core tube, or a nested and directly bonded mast tube on an outer surface of the core tube. The ceramics may include alumina-based ceramics, as well other suitable ceramic materials, and the tube may be made from the same ceramic compositions or different ceramic compositions. The invention also includes a method of making the nested tube, directly boded insulators by controlling shrinkage during sintering. | 10-15-2009 |
| 313125000 |
Movable electrode (e.g., for cleaning, adjustable) | 1 |
| 20150028737 | Spark plug, in particular swirl chamber spark plug - A spark plug includes: a center electrode having at least one first spark surface and extending along a longitudinal axis of the spark plug; and a ground electrode having at least one second spark surface, the first spark surface being situated diametrically opposed to the second spark surface, so that an ignition spark may be generated between the first and second spark surfaces, the center electrode being rotatable coaxially to the longitudinal axis with respect to the ground electrode, and the first and second spark surfaces being inclined in such a way that rotating the center electrode with respect to the ground electrode makes it possible to set a distance between the first and second spark surfaces. | 01-29-2015 |
| 313123000 |
Plural series gaps | 1 |
| 20150340845 | SPARK PLUG - A spark plug having an insulator, a metallic shell disposed around the insulator, a first ground electrode having a first surface facing a side surface of a center electrode in a radial direction so as to form a first gap, and a second ground electrode having a second surface facing the side surface of the center electrode in the radial direction so as to form a second gap. A relation 60°≦θ≦150° is satisfied, where θ is a smaller one of angles formed between a first line connecting an axial line of the center electrode and the center of the first surface and a second line connecting the axis and a center of the second surface when viewed from a forward end side toward a rear end side in the direction of the axis. | 11-26-2015 |
| 313129000 |
With transparent part | 1 |
| 20080211373 | Spark Plug With Optical Sensor - A spark plug has an optical window for sensing combustion processes in an Otto engine. The optical window is located in the central electrode of the spark plug and has at least one lens exposed to the combustion chamber, as well as at least one flexible optical fiber which can conduct light through the spark plug from the lens to an analysis system. | 09-04-2008 |
| Entries |
| Document | Title | Date |
|---|
| 20080218052 | Spark plug - The invention relates to a spark plug ( | 09-11-2008 |
| 20080238280 | SPARK PLUG OF INTERNAL COMBUSTION ENGINE - There is provided a spark plug of an internal combustion engine, including a cylindrical metal shell, an insulator retained in the metal shell and having a through hole in an axial direction of the spark plug and a center electrode fitted in the through hole of the insulator. The insulator includes a rear body portion, a middle body portion and a large-diameter portion located between and protruded radially outwardly from the rear and middle body portions to define a rear shoulder section connected to the rear body portion and a front shoulder section connected to the middle body portion. For strength improvements, the insulator has a first glaze layer extending over the rear body portion and the rear shoulder section of the large-diameter portion and a second glaze layer extending over at least part of the middle body portion from some point on the front shoulder section of the large-diameter portion. | 10-02-2008 |
| 20080284303 | Spark Plug for Motor Vehicle Internal Combustion Engine - A spark plug for a motor vehicle internal combustion engine, substantially elongated in shape, and including: two coaxial electrodes of an inner central electrode and an outer base electrode enclosing the central electrode; and an electrically insulating annular block, interposed between the central electrode and the base electrode and including an annular shoulder. The insulating annual block includes an annular groove located at the shoulder. | 11-20-2008 |
| 20090072694 | Sparkplug having improved heat removal capabilities and method to recycle used sparkplugs - Here in is disclosed a system of heat removal for the electrode part of a sparkplug that is used in the internal combustion engine. This is so as to use electrodes that have a very large mass as compared to the smaller, to very small electrodes, as in the case of using precious metals. | 03-19-2009 |
| 20100001626 | Spark plug - The invention relates to a spark plug for igniting a combustible gas mixture in an internal combustion engine, comprising an ignition electrode ( | 01-07-2010 |
| 20100007260 | SPARK PLUG HAVING AN INSULATOR COMPOSED OF HIGH-PURITY ALUMINIUM OXIDE CERAMIC - A spark plug is described for Otto-cycle engines having a metallic spark plug body, having a center electrode, having a ceramic insulator, which is arranged between the center electrode and the body and is based on aluminium oxide, and having at least one earth electrode. The invention provides for the insulator to be composed of 0.01% by weight to 1% by weight of magnesium oxide, at most 0.3% by weight of natural and/or impurities, with the rest being aluminium oxide, and being formed by solid-phase sintering so that it is very largely free of glass phases. | 01-14-2010 |
| 20100007261 | Spark plug for position-oriented installation - A spark plug for an internal combustion engine includes a ground electrode, a center electrode, an insulator, a housing, and a folded packing which is situated on an outer circumference of the housing. The folded packing has: a hollow profile in cross section; a free leg directed outwards; and a support region. The folded packing lies on a contact surface in a support region, and the free leg is situated at an angle to the support region. The folded packing is pressed together during the mounting of the spark plug, and the free leg of the folded packing is designed to bend over in the direction of the support surface during the mounting to provide a diameter enlargement of the folded packing. | 01-14-2010 |
| 20100084960 | SPARK PLUG - An object of the invention is to provide a spark plug including an insulator which is difficult to cause breakdown and exhibits higher withstand voltage characteristics. This invention relates to a spark plug | 04-08-2010 |
| 20100148653 | ALUMINA-BASED SINTERED BODY FOR SPARK PLUG AND METHOD OF MANUFACTURING THE SAME, AND SPARK PLUG AND METHOD OF MANUFACTURING THE SAME - An alumina-based sintered body for a spark plug having enhanced mechanical strength and a method of manufacturing the same, as well as a spark plug having the alumina-based sintered body for a spark plug and a method of manufacturing the same. | 06-17-2010 |
| 20100253202 | Ignition Coil for Vehicle - A spark plug coil assembly has a primary core bearing primary windings and a secondary winding spool around which secondary windings are wound and in which the primary core is received. A case receives the spool with core. The entire case can be made of composite Iron to function as a magnetic return path for the core. Thick ends of the case support the ends of the core. | 10-07-2010 |
| 20110037370 | SPARK PLUG INCLUDING ELECTRODES WITH LOW SWELLING RATE AND HIGH CORROSION RESISTANCE - A spark plug ( | 02-17-2011 |
| 20110148273 | SPARK PLUG AND METHOD OF MANUFACTURING THE SAME - A spark plug includes an insulator having an axial hole extending in the direction of an axis, and a terminal electrode disposed at a rear end portion of the axial hole. An identifier bearing externally visible identification information is joined to the rear end surface of the terminal electrode. The identifier has a thickness of 0.03 mm or greater along the direction of the axis. | 06-23-2011 |
| 20120001532 | MANUFACTURING APPARATUS AND MANUFACTURING METHOD FOR SPARK PLUGS - Provided is a technique for limiting the radial displacement between a metal shell and an insulator in a spark plug. At the time of manufacturing a spark plug with a metal shell and an insulator, the metal shell and the insulator are assembled together by, while allowing relative positional displacement between the metal shell and the insulator in an axial direction (O-O), limiting relative positional displacement between the metal shell and the insulator in a radial direction intersecting with the axial direction in such a manner that the amount of deviation between an axis of the metal shell and an axis of the insulator becomes less than or equal to a predetermined level. | 01-05-2012 |
| 20120086325 | HIGH VOLTAGE RESONATOR-AMPLIFIER WITH AN OPTIMIZED STRUCTURE FOR RADIOFREQUENCY IGNITION SYSTEM - A high voltage resonator-amplifier for a radiofrequency ignition system that can be used in an internal combustion engine, the resonator-amplifier including at least two electrodes, a coil arranged in alignment with the electrodes along a longitudinal axis, and a linking mechanism retaining the coil and the electrodes in a relatively fixed position. The coil is wound around a closed bend which in turn wraps around the longitudinal axis. | 04-12-2012 |
| 20120139405 | ANTI-FOULING SPARK PLUG AND METHOD OF MAKING - Disclosed herein is a spark plug comprising an insulative sleeve having a central axial bore and an exterior surface and a center electrode extending through the central axial bore of the insulative sleeve. The insulating sleeve is positioned within, and secured to, a metal shell that serves as a mounting platform and interface to an internal combustion engine. The metal sleeve also supports a ground electrode that is positioned in a spaced relationship relative to the center electrode so as to generate a spark gap. The insulating sleeve includes a shaped tip portion that resides in a recessed end portion of the metal shell. A coating is disposed on the exterior surface of the shaped tip portion of the insulative sleeve. The coating comprises a metal oxide, a noble metal, late transition metal, or a combination comprising two or more of the foregoing metals. | 06-07-2012 |
| 20120161604 | FLEXIBLE IGNITOR ASSEMBLY FOR AIR/FUEL MIXTURE AND METHOD OF CONSTRUCTION THEREOF - An ignitor assembly constructed in accordance with one aspect of the invention has an upper inductor subassembly coupled to a lower firing end subassembly for relative pivot movement between the subassemblies. The upper inductor subassembly includes a tubular housing with inductor windings received therein with an upper electrical connector adjacent an upper end of the housing and a lower electrical connector adjacent a lower end of the housing. The lower firing end subassembly includes a ceramic insulator and a metal housing surrounding at least a portion of the ceramic insulator. The ceramic insulator has an electrical terminal extending from a terminal end and an electrode extending from a firing end. A flexible tube couples the upper inductor subassembly to the lower firing end subassembly and maintains the electrical terminal of the lower firing end subassembly in electrical contact with the lower electrical connector of the upper at a pivot joint. | 06-28-2012 |
| 20120169205 | ANTI-FOULING SPARK PLUG AND METHOD OF MAKING - Disclosed herein is a spark plug comprising an insulative sleeve having a central axial bore and an exterior surface and a center electrode extending through the central axial bore of the insulative sleeve. The insulating sleeve is positioned within, and secured to, a metal shell that serves as a mounting platform and interface to an internal combustion engine. The metal sleeve also supports a ground electrode that is positioned in a spaced relationship relative to the center electrode so as to generate a spark gap. The insulating sleeve includes a shaped tip portion that resides in a recessed end portion of the metal shell. A coating is disposed on the exterior surface of the insulative sleeve. The coating comprises a silicone resin, optionally in combination with a filler. | 07-05-2012 |
| 20120187819 | SPARK PLUG AND PROCESS FOR PRODUCING SPARK PLUG - A spark plug which exhibits high dielectric strength at high temperature and which is unlikely to be deteriorated in dielectric strength is provided. The spark plug includes a center electrode, an insulator, and a metallic shell. The insulator includes an alumina-based sintered body which contains a silicon component, a Group II element component, and a rare earth element component. The alumina-based sintered body is composed of a glass phase and an alumina crystal phase as observed through X-ray diffraction analysis. When the grain boundary phase of the alumina-based sintered body is observed under a transmission electron microscope, and the weight ratio between an alkali metal component and the rare earth element component as reduced to oxides thereof [alkali metal/rare earth element] is calculated at 30 circular spots, each having a diameter of 0.3 nm, selected arbitrarily in a field of observation, the average of the weight ratios of the 30 spots falls within a range of 0.01 to 1.0. | 07-26-2012 |
| 20120299457 | ANTI-FOULING SPARK PLUG AND METHOD OF MAKING - A spark plug is provided. The spark plug has an insulative sleeve with a central axial bore and an exterior surface of a shaped tip portion. A coating is disposed on the exterior surface of the shaped tip portion and the coating comprises a transition metal compound or a combination of transition metal compounds, and an alkali metal compound. A center electrode extends through the central axial bore of the insulative sleeve. A metal sleeve is provided, wherein the insulating sleeve is positioned within, and secured to, the metal shell. A ground electrode is coupled to the metal shell and positioned in a spaced relationship relative to the center electrode so as to define a spark gap. | 11-29-2012 |
| 20130002120 | SPARK PLUG, METAL SHELL FOR SPARK PLUG, AND METHOD OF MANUFACTURING SPARK PLUG - Provided is a spark plug that is excellent not only in salt resistance but also in stress corrosion cracking resistance. The spark plug includes a metal shell covered by a composite layer including a nickel plating layer and a chromate layer formed on the nickel plating layer. The chromate layer has a film thickness of 2 to 45 nm and Cr element concentration of not more than 60 at % and contains Ni in addition to Cr. | 01-03-2013 |
| 20130038197 | SPARK PLUG DESIGNED TO INCREASE SERVICE LIFE THEREOF - A spark plug for an internal combustion engine is provided which is equipped with an inward top end protrusion. The inward top end protrusion extends inwardly from a top end of a cylindrical housing within which a porcelain insulator is disposed. The porcelain insulator has a center electrode disposed therein. The inward top end protrusion is at least partially located to be closer to the top of the spark plug than a top end of the porcelain insulator is in an axial direction of the spark plug. This enhances the strength of an electric field surrounding the center electrode, which facilitates the ease with which an electron is emitted by the center electrode and thus permits an initial required voltage at the spark plug to be decreased, thereby resulting in an increase in service life of the spark plug. | 02-14-2013 |
| 20130293086 | SPARKPLUG FOR AN INTERNAL COMBUSTION ENGINE - A sparkplug including an induction coil and an electrode. The induction coil includes two end portions, the electrode extending in a continuation of one of the two end portions. The induction coil includes a conducting wire wound to form a succession of turns, the one of the two end portions having a terminal turn connected to the electrode. The one of the two end portions includes a plurality of coaxial end turns that extend between the terminal turn and an upstream turn, and the terminal turn has a diameter smaller than the diameter of the upstream turn so to reduce strength of the electric field induced in the one of said two end portions near the terminal turn. | 11-07-2013 |
| 20160023953 | ALUMINA SINTERED BODY AND SPARK PLUG - An alumina sintered body contains a main phase consisting of alumina crystal, and crystalline phases dispersed in the main phase. The crystalline phases consist of at least one selected from a group consisting of MgAl | 01-28-2016 |
