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Match Document Document Title
8148883 Spark plug used for an internal-combustion engine and a method for manufacturing the same  
The present invention provides a highly reliable spark plug used for an internal-combustion engine and including an insulator with a high withstand voltage, and a method for manufacturing the same....
8143773 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...
8129891 Spark plug  
A spark plug (100) including a noble metal tip (80) disposed on a distal end portion (31) of a ground electrode (30). The noble metal tip (80) is joined to the top surface of an intermediate member...
8115372 Spark plug for internal combustion engine and method of manufacturing the same  
A spark plug for an internal combustion engine, includes: a cylindrical insulating body; a center electrode; a cylindrical metal shell; and a ground electrode, as defined herein, wherein the noble...
8040029 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...
8035286 Spark plug casing and spark plug having the spark plug casing  
A spark plug casing includes a single-piece shell having a nut portion, first and second tubular portions and a converging shell portion, which are configured to be removed from a cylinder head as...
8030831 High thread spark plug with undercut insulator  
A spark plug for an internal combustion engine, the spark plug having an elongated center electrode having a center electrode tip at one end and a terminal proximate to another end of the center...
8026654 Ignition device having an induction welded and laser weld reinforced firing tip and method of construction  
An ignition device for an internal combustion engine and method of construction therefore includes a housing with an insulator secured therein. A center electrode is mounted within the insulator. A...
7994694 Spark plug for internal combustion engine  
A spark plug (1) for an internal combustion engine includes: a cylindrical insulator (2) having an axial hole (4) penetrating in a direction of an axis (C1); a center electrode (5) partially...
7977857 High thread ground shield  
A spark plug for an internal combustion engine comprises an elongated center electrode having a center electrode tip at one end and a terminal proximate the other end, an insulator substantially...
7948159 Spark plug with multi-layer firing tip  
A spark plug having a multilayer firing tip that minimizes the amount of precious metal used and a method of assembling a spark plug with a multilayer firing tip. The firing tip includes a...
7944134 Spark plug with center electrode having high heat dissipation property  
A spark plug including: a center electrode including an electrode base member and a core member; an electrode tip joined to the center electrode via a molten bond; an insulator holding the center...
7923910 Spark plug having a metallic shell with defined relationship between its outer and inner surfaces  
A spark plug including an insulator and a metallic shell having an outer surface and an inner surface. The outer surface has a taper portion which comes into contact with a peripheral region around...
7893604 Spark plug with stream shaper to shape tumble vortex into desired stream in combustion chamber  
A spark plug for an internal combustion engine is provided which includes a hollow cylindrical metal shell with an open end portion to be exposed to a combustion chamber of the engine, a ground...
7859177 Spark plug for internal-combustion engines  
A spark plug for an internal-combustion engine is provided wherein the central and ground electrodes exhibit a long service life and wherein the fatigue strength at high temperatures is improved....
7847473 Spark plug  
A spark plug in which a distal end portion (60) of a crimp portion (53) of a metallic shell (50) is crimped by bending the distal end portion inward, whereby the metallic shell (50) and an...
7839065 Plasma jet spark plug and manufacturing method therefor  
A plasma jet spark plug and a manufacturing method therefor are disclosed. In a state in which a noble-metal chip having a flange-like outwardly projecting portion is disposed in a communication...
7795791 One piece shell high thread spark plug  
A spark plug for igniting gases in an internal combustion engine is disclosed. The spark plug has a center electrode, an insulator, a one-piece shell, and a terminal. The center electrode is in...
7768183 Extension spark plug  
An extension-type spark plug (10) is disclosed for igniting the air-fuel mixture in an internal combustion engine. The spark plug (10) includes an installation conduit (12), a contact button (34),...
7719172 Platinum-based alloy for spark plug electrodes incorporating palladium and iridium  
A spark plug comprising: an insulator shell; a center electrode inside the insulator shell such that one end of the center electrode protrudes from the insulator shell; a metal shell exterior to...
7710006 Spark plug  
A spark plug in which a glaze is applied to a rear trunk portion (245), a shoulder portion (240), and a portion of a intermediate diameter portion (230) of an insulator (200), and glaze firing is...
7626320 Spark plug with excellent impact resistance conductive seal, and method for producing the same  
An object of the present invention is to provide a spark plug which has more excellent impact resistance with electrical conductivity and airtightness kept excellent. In the invention, each of...
7586246 Spark plug designed to ensure high strength of electrode joint and production method thereof  
An improved structure of a spark plug is provided to ensure a high strength of joint between a ground electrode and a metal shell. The ground electrode is resistance-welded to the metal shell so...
7521850 Spark plug with multi-layer firing tip  
A spark plug having a multilayer firing tip that minimizes the amount of precious metal used and a method of assembling a spark plug with a multilayer firing tip. The firing tip includes a...
7521849 Spark plug with welded sleeve on electrode  
A spark plug assembly (22) includes a center electrode (34) having a high performance metal sleeve (50) attached at its sparking end. The sleeve (50) is fitted to a tenon on the end of the center...
7449824 Spark plug  
A spark plug is provided with a metal shell and a ceramic insulator to support therein a center electrode. The ceramic insulator includes a front portion with a stepped outer surface, a middle...
7408293 Spark plug including ground elcetrode carrier casing  
A spark plug, in particular for use in internal combustion engines, includes a spark plug casing and a ground electrode carrier casing. The ground electrode carrier casing has at least two ground...
7402941 Spark plug  
A spark plug including a cylindrical insulator having an axial hole extending in an axial direction; a center electrode held in the axial hole on a leading end side; a connecting terminal held in...
7400081 Compact spark plug with high gas tightness  
A spark plug has a compact structure where a threaded portion of a metal shell has a size of M10 or M12 and the width between any two opposite side surfaces of a polygonal prism-shaped portion of...
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...
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...
7323810 Spark plug for an internal combustion engine  
A spark plug for an internal combustion engine comprising a centre electrode and an earth electrode serving as a spark discharge section, as well as a noble metallic chip, which is inserted into...
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...
7321187 Spark plug and method for manufacturing the spark plug  
A ground-electrode spark portion 32 is formed from a noble metal which contains Pt as a main component, and is joined to a main metal portion of the ground electrode 4 via an alloy layer which has...
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...
7262547 Spark plug element having defined dimensional parameters for its insulator component  
A spark plug which includes an end at its combustion chamber end, and an end at its connecting end, as well as a housing and an insulator situated in the housing. The insulator has a longitudinal...
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...
7221078 Spark plug with improved noble metal chip  
In a spark plug composed of a center electrode and an earth electrode, at least one of confronting portions of the center electrode and the earth electrode which are in opposed relation to each...
7192324 Method for producing a spark plug electrode  
A method of joining an electrode of a spark plug with a noble metal is described, the noble metal being joined locally with the electrode using a thermal input produced by a continuously operating...
7122947 Glow plug and spark plug, and manufacturing method therefor  
In a glow plug and a spark plug, the surface of a main metal shell is coated with a chromate film in which the quantity of trivalent chrome is 95 wt % or more of the contained chrome components and...
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...
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...
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...
7030544 Spark plug designed to enhance strength of joint of noble metal member to ground electrode  
An improved structure of a spark plug is provided for improving the mechanical strength of joints between a noble metal member made of Ir-alloy and a ground electrode which withstands intense heat....
7015633 Spark plug  
A noble metallic firing tip includes a protruding portion which is formed partly on its outer circumferential surface so as to protrude in the direction substantially normal to the axis of a center...
6909226 Method for manufacturing spark plug, and spark plug  
An insulator (2) is inserted into a metallic shell (1) in the direction of an axis O, and a sealing material powder (160) is charged into a circumferential gap (20) formed between the inner...
6885137 Spark plug and its manufacturing method  
Ir alloy firing tips are bonded on opposed surfaces of a center electrode and a ground electrode facing to a discharge gap. The configuration of a cross-sectional area of the Ir alloy firing tip...
6882092 Jet nozzle spark plug  
A spark plug having a ground electrode in the shape of a horn nozzle defined by an enlarged mouth and a reduced throat joined together, a conical inner wall tapered from the mouth to the throat. An...
6873094 Ignition device for internal combustion engine and a manufacturing method therefor  
In an ignition device for an internal combustion engine which is mounted in a cylinder head in a state where a spark plug and an ignition coil are integrated with each other, the plug side tube...
6849995 Spark plug and method for manufacturing the spark plug  
A spark plug configured such that a metallic shell is joined to an insulator through hot-crimping. The metallic shell is firmly joined to the insulator by means of a sufficient fastening force even...
Matches 1 - 50 out of 154 1 2 3 4 >