Patents Assigned to Yura Tech Co., Ltd.
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Publication number: 20210383963Abstract: The present invention provides an ignition coil which can be reduced in weight and cost while retaining the performance of conventional ignition coils. The objective of the present invention is to provide an ignition coil which can be manufactured using conventional processes, such that costs due to process switching are not incurred. The ignition coil is characterized by comprising: a pipe-shaped spool; and a wire wound on the outer circumference of the spool, wherein the wire is formed extending in one direction, and the central portion of a cross-section perpendicular to the direction of extension is formed of aluminum, while the outer surface of the cross-section is formed of copper.Type: ApplicationFiled: November 29, 2019Publication date: December 9, 2021Applicant: YURA TECH CO., LTD.Inventors: Yang Jun KIM, Jong Hyung LEE, Moo Hyuk BANG, Jae Moon JUNG
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Patent number: 8471174Abstract: A method of welding a noble metal tip of a spark plug to an electrode is provided. In the method of welding, in a waveform of a power of a laser beam according to a time of the laser welding, a power of a central portion thereof is smaller than those of both end portions thereof. In addition, the waveform of the power of the laser beam according to a time of the laser welding is a trapezoidal waveform which includes: a rising portion in which the power of the laser beam is gradually increased; a power maintaining portion in which the power of the laser beam after the rising portion is maintained uniform; and a falling portion in which the power of the laser beam after the power maintaining portion is gradually decreased.Type: GrantFiled: April 2, 2008Date of Patent: June 25, 2013Assignee: Yura Tech Co., Ltd.Inventors: Dae Yeol Ohm, Seok Ki Song, Hyun Joong Kim, Byung Heon Shin, Young Tae Yoo
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Patent number: 8217562Abstract: Provided is an ignition plug used for an internal-combustion engine. The ignition plug includes: a center electrode; an insulator disposed outside the center electrode; a metal housing disposed outside the insulator; a ground electrode having an end connected to the metal housing and the other end facing the center electrode; and an electrode tip fixed to one or more of the center electrode and the ground electrode. The electrode tip is made of an alloy of iridium Ir, hafnium Hf, and niobium Nb. Therefore, the ignition plug with the low-cost iridium can have high resistance to prevent an iridium element from oxidizing and vaporizing in high speed driving conditions.Type: GrantFiled: September 21, 2007Date of Patent: July 10, 2012Assignee: Yura Tech Co., Ltd.Inventors: Dae Yeol Ohm, Nack J. Kim, Jun Ho Bae, Seok Ki Song, Hyun Joong Kim, Jong Hyun Im
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Publication number: 20100258541Abstract: A method of welding a noble metal tip of a spark plug to an electrode is provided. In the method of welding, in a waveform of a power of a laser beam according to a time of the laser welding, a power of a central portion thereof is smaller than those of both end portions thereof. In addition, the waveform of the power of the laser beam according to a time of the laser welding is a trapezoidal waveform which includes: a rising portion in which the power of the laser beam is gradually increased; a power maintaining portion in which the power of the laser beam after the rising portion is maintained uniform; and a falling portion in which the power of the laser beam after the power maintaining portion is gradually decreased.Type: ApplicationFiled: April 2, 2008Publication date: October 14, 2010Applicant: YURA TECH CO., LTD.Inventors: Dae Yeol Ohm, Seok Ki Song, Hyun Joong Kim, Byung Heon Shin, Young Tae Yoo
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Publication number: 20100026159Abstract: Provided is an ignition plug used for an internal-combustion engine. The ignition plug includes: a center electrode; an insulator disposed outside the center electrode; a metal housing disposed outside the insulator; a ground electrode having an end connected to the metal housing and the other end facing the center electrode; and an electrode tip fixed to one or more of the center electrode and the ground electrode. The electrode tip is made of an alloy of iridium Ir, hafnium Hf, and niobium Nb. Therefore, the ignition plug with the low-cost iridium can have high resistance to prevent an iridium element from oxidizing and vaporizing in high speed driving conditions.Type: ApplicationFiled: September 21, 2007Publication date: February 4, 2010Applicant: YURA TECH CO., LTD.Inventors: Dae Yeol Ohm, Nack. J. Kim, Jun Ho Bae, Seok Ki Song, Hyun Joong Kim, Jong Hyun Im