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SPARK PLUGS

Subclass of:

313 - Electric lamp and discharge devices

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
313141000 Particular electrode structure or spacing 208
313143000 Shaped electrode chamber, insulator end, shell skirt, baffle or gas directing means 25
313144000 With specific joint structure 11
313135000 With particular connector structure 7
313139000 Ring or disk electrode (e.g., sector) 4
20100072874SPARK PLUG - A spark plug includes a ceramic insulator sleeved on a center electrode so that an end of the center electrode extends outwardly of an end surface of the ceramic insulator, a conductive outer shell surrounding spacedly the ceramic insulator, and a ground electrode including an annular portion disposed coaxially around the end of the center electrode such that an annular gap smaller than 1 mm is defined between the annular portion and the ceramic insulator, and a connecting portion interconnecting electrically the annular portion and the conductive shell. The annular portion of the ground electrode cooperates with the end of the center electrode and the end surface of the ceramic insulator to define an air-blocking space thereamong in spatial communication with the annular gap.03-25-2010
20120104926SPARK PLUG, PARTICULARLY FOR A STATIONARY INTERNAL COMBUSTION ENGINE - A spark plug, especially for a stationary internal combustion engine, is described that includes a ground electrode and a center electrode, the center electrode including an inner area, an outer ring and at least two crosspieces, in which the at least two crosspieces connect the inner area to the outer ring.05-03-2012
20090096344Sparkplugs and method to manufacture and assemble - The invention is a spark plug having multiple precise spark gaps (G} with a donut shaped electrode (04-16-2009
20130193833SPARK PLUG - A spark plug includes an insulator having a first end, the insulator having a center axis and a center electrode coupled to the insulator and having a center electrode tip extending beyond the first end of the insulator. The spark plug further includes a ground electrode having an end spaced from an end of the center electrode, the ground electrode having a first portion extending substantially parallel to the center axis and a second portion extending at an angle from the first portion and relative to the center axis. A ground electrode tip is disposed on the second portion of the ground electrode, wherein the ground electrode tip is spaced from the center electrode tip. A ring member is operatively connected to the center electrode proximate the center electrode tip.08-01-2013
313140000 Plural parallel gaps (e.g., main and standby, serrated electrode) 4
20090079318Spark Plug - The improved spark plug of the present invention includes three parallel electrodes in the form of letter (T) of identical strips made of nickel alloys or iridium. The positive electrode lies in the middle between the negative electrodes, so that each negative electrode is welded to the threaded end of the plug body. All the electrodes are in vertical position, and in the same horizontal plane. The gap distance between the electrodes is the same as in the traditional spark plug. Finally, the great area of the opposite electrodes (32 mm03-26-2009
20120025689Prechamber spark plug - The invention refers to a prechamber spark plug comprising an ignition electrode with several electrode arms. The ignition electrode is made of a cross-shaped blank that is cut out of sheet metal and then the electrode arms are set upright by bending. The sheet metal is made of iridium or an iridium-based alloy by rolling in a rolling direction and the ignition electrode blank is cut out in such a way that an angle of 50° or less is present between each of the electrode arms and the rolling direction (W).02-02-2012
20130099652SPARK PLUG ASSEMBLY FOR ENHANCED IGNITABILITY - A spark plug is provided having an insulator with a center axis. A center electrode is coupled to the insulator and has a second end extending from an end of the insulator, the center electrode having a first tip member. A ground electrode is spaced apart from the center electrode, wherein the ground electrode has a first portion extending substantially parallel to the center axis and a second portion extending on an angle from the first portion and relative to the center axis. A second tip member is disposed on the second portion of the ground electrode such that the first tip member and the second tip member cooperate to form a gap.04-25-2013
20130099653PRECHAMBER SPARKPLUG - A pre-chamber sparkplug is suggested with a central electrode, with at least one ground electrode, which is distanced from the central electrode forming a spark gap, and with at least one transfer bore in a pre-chamber cap. The ground electrode comprises an internal circumferential area, which faces the central electrode, and an external circumferential area, which faces away from the central electrode. The internal circumferential area of the ground electrode shows a concave progression in the longitudinal direction of the pre-chamber sparkplug, subjected to a tensile force, and the external circumferential area shows a convex progression in the longitudinal direction of the pre-chamber sparkplug, subjected to a pressure.04-25-2013
313130000 Non-conducting material in or adjacent gap (e.g., restricts spark) 3
20090021133PLASMA 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
20090033194PLASMA-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
20100314987SPARK 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 mm12-16-2010
313120000 With fluid feed or air vent 3
20090102345SPARK PLUG - A spark plug 04-23-2009
20120299458SPARK PLUG FOR INTERNAL-COMBUSTION ENGINES - A spark plug for internal-combustion engines includes a housing, an insulator, a center electrode, and an earth electrode. A gas guiding sections equipped with slopes that slope inwardly as they approach toward a tip side from a circumference surface of the housing and guide surfaces that are disposed on both sides in a circumferential direction of the slopes are formed in a tip part of the housing. The gas guiding sections are formed in the circumferential direction within a 90-degree range measured relative to the center of the earth joint section, which is a junction of the housing and the earth electrode, in the circumferential direction. When the spark plug is mounted to the engine, it is constituted so that the gas guiding sections are projected into a combustion chamber.11-29-2012
20130009534IGNITER PLUG AND METHOD OF MANUFACTURING IGNITER PLUG - A ground electrode of an igniter plug has inlets for supplying cooling fluid therethrough to a first space formed between an insulator and the ground electrode, and first outlets located forward of the inlets and radially outward of the inner circumference of a ground electrode forward-end portion and adapted to discharge the cooling fluid therethrough. A second space communicating with the first space and having a second outlet for discharging the cooling fluid therethrough is formed between a forward end surface of the insulator and a surface of the ground electrode which faces the forward end surface.01-10-2013
313136000 Plural part center electrode lead-in 2
20120056522Corona 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
20090127996IRIDIUM 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
313134000 With radio shielding 2
20100187968IGNITION 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
20110037371Spark 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 CP02-17-2011
313137000 Plural part insulating means 1
20090256461CERAMIC 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
313129000 With transparent part 1
20080211373Spark 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
313133000 Ball electrode 1
20100187967SPARK 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
313122000 Removable electrode on shell 1
20120176018SPARK 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
Entries
DocumentTitleDate
20120161604FLEXIBLE 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
20130038197SPARK 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
20100007261Spark 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
20120139405ANTI-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
20100084960SPARK 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
20080238280SPARK 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
20080284303Spark 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
20100148653ALUMINA-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
20090072694Sparkplug 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
20100001626Spark 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
20110148273SPARK 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
20080218052Spark plug - The invention relates to a spark plug (09-11-2008
20120001532MANUFACTURING 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
20120169205ANTI-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
20100007260SPARK 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
20120187819SPARK 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
20120299457ANTI-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
20100253202Ignition 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
20110037370SPARK PLUG INCLUDING ELECTRODES WITH LOW SWELLING RATE AND HIGH CORROSION RESISTANCE - A spark plug (02-17-2011
20120086325HIGH 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

Patent applications in class SPARK PLUGS

Patent applications in all subclasses SPARK PLUGS