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| Number | Title | Issue Date |
| 7952263 | Multi-spark inducing spark plug and associated method A spark plug for use with an internal combustion vehicle engine preferably includes a housing having a single primary electrode and a single grounding electrode located subjacent to the single primary electrode. The single primary and grounding electrodes are spaced... | 05/31/2011 |
| 7615914 | Spark plug of an internal combustion engine A spark plug of an internal combustion engine, in particular for use in Otto-cycle gas engines, comprising an insulator body, a base central electrode, at least one ground electrode and at least one swirl chamber, wherein the electrodes of the spark plug are surroun... | 11/10/2009 |
| 7352121 | Spark plug A spark plug having a protrusion amount t of not smaller than 0.3 mm and satisfying a relation θ1+θ2≦93° in which θ1 is an included angle between virtual lines s1 and s2, and θ2 is an included angle between virtual lines s | 04/01/2008 |
| 7309951 | Spark plug A spark plug is disclosed having at least one main electrode and at least one secondary electrode. The gaps associated with the secondary electrodes are between one third and two thirds the optimum gap distance. Resistors associated with the secondary electrodes con... | 12/18/2007 |
| 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 |
| 7278387 | Multiple spark pattern internal combustion initiation device and engine using same A multiple spark pattern internal combustion initiation device includes a body defining a prechamber and a plurality of orifices from the prechamber. The device includes at least two electrical circuits which each form a spark gap with an electrical ground inside th... | 10/09/2007 |
| 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 |
| 7230370 | Spark plug A spark plug including an insulator having an axial hole in an axial direction of the spark plug; 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 including a first gr... | 06/12/2007 |
| 7095601 | High energy primary spark ignition system for a gas turbine engine An exciter circuit for a gas turbine engine delivers a first single high-energy spark followed by subsequent sparks of relatively lower energy to ensures start reliability by specifically clearing ice build-up at the ignition plugs. ... | 08/22/2006 |
| 7093421 | Spark igniter for gas turbine engine An igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an auxiliary electrode is provided, which is embedded in and covered by a solid insulator. During initial phases of operatio... | 08/22/2006 |
| 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 |
| 7023127 | Multi-point spark plug The present invention relates to a multi-point spark plug capable of facilitating the attachment of a plug cap. The multi-point spark plug is made up of two center electrodes, an insulator for accommodating the center electrodes, a housing for holding the insulator ... | 04/04/2006 |
| 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 |
| 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 |
| 6917145 | Spark plug A spark plug includes at least one ground electrode with a reduced temperature level. The spark plug encompasses a tubular metallic housing that has, at the combustion-chamber end, an outer rim on which at least one ground electrode is positioned. The cross-sectiona... | 07/12/2005 |
| 6819031 | Spark plug and a method of producing the same Reliability in connection between a chip and a base material (at least one of the central electrode and the ground electrode) of a spark plug is improved by forming a plurality of welding layers at connection between the chip and the base material in a distance incr... | 11/16/2004 |
| 6819032 | Spark plug having resistance against smoldering, long lifetime, and excellent ignitability An object is to realize a spark plug which is less affected by “carbon fouling,” has a long service life, and exhibits excellent ignition characteristics. An air gap (α) is formed between a parallel ground electrode 11 and an end face of a center ... | 11/16/2004 |
| 6768249 | Spark plug and producing method therefor In a spark plug, a complex chromate coat 42 that contains a chromium component and a phosphorus component as cationic components, at least 90 wt % of the chromium component being trivalent chromium and the phosphorus component being present in an amount of 1 ... | 07/27/2004 |
| 6744189 | Spark plug A spark plug 100 is configured such that an insulator 2 is formed of alumina ceramic, and the diameter of a through-hole 6 is not greater than 4 mm as measured at a position where conductive seal materials 16 and 17 are disposed. T... | 06/01/2004 |
| 6670740 | High electrical stiction spark plug A spark plug includes a sparking electrode with a firing tip and a ground electrode. The ground electrode includes a toroidal member, having a convex outer surface, coupled to a support portion of a sleeve of the ground electrode. The toroidal member form... | 12/30/2003 |
| 6611083 | Torch jet spark plug electrode The torch jet spark plug comprises a shell with an insulator body concentrically disposed within at least a portion of the shell. A pre-chamber is concentrically disposed within at least a portion of the shell and at least a portion of the insulator body,... | 08/26/2003 |
| 6608430 | Spark plug with multi-point firing cap Provided is a spark plug that includes a central electrode having a proximal end and a distal end and a cap having a central portion and plural projections extending radially from the central portion. The cap has a proximal side and a distal side, and the... | 08/19/2003 |
| 6566793 | Spark plug In a spark plug of the invention, as the top end edge of a terminal 13 is located within a middle trunk portion 2g of the insulator 2 with a longer reach of the screw portion 7, it acts as a support against fracture, more likely causing the problem of str... | 05/20/2003 |
| 6489709 | Captive spark plug gasket A gasket for a threaded element such as a spark plug to be screwed into a threaded hole of a support such as a cylinder head is provided. The threaded element has a threaded portion and an annular seat portion. The gasket is installed on the threaded elem... | 12/03/2002 |
| 6362562 | Top and side firing spark plug A spark plug derives an extended lifetime because a large plurality of sharp edges are provided on the center electrode, the ground electrode, or both to enhance spark propagation. In a first embodiment, the ground electrode has a conventional cantilever ... | 03/26/2002 |
| 6337533 | Spark plug for internal combustion engine and method for manufacturing same In a spark plug, a chip made of Ir alloy is partly buried into and bonded by laser beam welding on the ground electrode made of Ni base alloy. A molten portion is extended from the inside of the ground electrode through a junction of the chip and the elec... | 01/08/2002 |
| 6265814 | Spark plug having a bypass electrode extending along a bypass path between center and ground electrode To excellently grow flame kernel while lowering breakdown voltage, a bypass electrode comprising a semiconductor material is installed in a path bypassing an inductive spark gap between a center electrode and a ground electrode, and the center electrode a... | 07/24/2001 |
| 6232703 | Multiple electrode igniter An igniter for a combustor of a gas turbine comprises a ground shell electrical conductor which provides the electrical ground path back to the spark source. The spark source connects to the conductor and a ground return path connects to the ground shell.... | 05/15/2001 |
| 6204594 | Spark plug with pressure sensor A spark plug is installed in an internal combustion engine to monitor engine performance. The spark plug includes an outer shell having a central longitudinal axis and defining a first bore extending along the central longitudinal axis. The outer shell al... | 03/20/2001 |
| 6160342 | Resistor-incorporated spark plug and manufacturing method of resistor-incorporated spark plug In a spark plug (100), the resistor composition constituting a resistor (15) contains semiconductive ceramic particles, offering a superior load life characteristic. Also, the value of (댒-댑)/댑 >=-0.30, where a value of electric resist... | 12/12/2000 |
| 6121720 | Apparatus and method of manufacturing top and side firing spark plug A spark plug derives an extended lifetime because a large plurality of sharp edges are provided on the center electrode, the ground electrode, or both to enhance spark propagation. In a first embodiment, the ground electrode has a conventional cantilever ... | 09/19/2000 |
| 6111345 | Spark plug for apparatus for detecting ion current without generating spike-like noise on the ion current In a spark plug having a generally cylindrically shaped metallic body, a generally cylindrically shaped insulator held in the metallic body, a center electrode held in the insulator, and a ground electrode facing the center electrode, the insulator has a ... | 08/29/2000 |
| 6064143 | Multielectrode spark plug In order to provide a multielectrode spark plug which is excellent in resistance to fouling and in which the voltage required for producing a spark can be lowered, the tip portion of at least one of plural ground electrodes is positioned by the side of an... | 05/16/2000 |
| 6060822 | Spark plug A very unique universal bi-directional firing spark plug for any spark ignited internal combustion engine, whether racing, industrial, truck, aeronautical, automotive, recreational or residential (for trimmers, edgers, brush cutters, leaf blowers, leaf va... | 05/09/2000 |
| 6013973 | Spark plug having a sub-combustion chamber for use in fuel ignition systems A spark plug for use in conventional fuel ignition systems includes a housing and a ground electrode attached to the housing. A center electrode is located within the housing and is spaced apart from the ground electrode to form an electrode gap. An insul... | 01/11/2000 |
| 5936332 | Spark plug A very unique universal bi-directional firing spark plug for any spark-ignited internal combustion engine is described. This spark plug eliminates misfire and improves gas mileage, peaks engine performance, horsepower, and increases the RPM range. This un... | 08/10/1999 |
| 5892319 | Top and side firing spark plug A spark plug derives an extended lifetime because a large plurality of sharp edges are provided on the center electrode, the ground electrode, or both to enhance spark propagation. In a first embodiment, the ground electrode has a conventional cantilever ... | 04/06/1999 |
| 5873338 | Spark plug for an internal combustion engine A spark plug has a cylindrical metal shell, a ground electrode and an insulator fixedly supported within the metal shell with a front end of the insulator extended beyond a front end of the metal shell. The insulator has an axial bore in which a center el... | 02/23/1999 |
| 5821676 | Spark plug with grooved, tapered center electrode The invention includes a spark plug for a combustion engine including a center electrode having a tapered portion with a plurality of ridges formed thereon. The spark plug may also include a tapered, ground electrode positioned over the center of the cent... | 10/13/1998 |
