Patents by Inventor Osamu Yoshimoto
Osamu Yoshimoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230311451Abstract: A joining layer of a joined body includes a joining material which contains, as a main component, a metal having a surface tension of 1000 mN/m or less at its melting point, and a metal layer which has a plurality of pores formed therein and in which at least some of the pores are impregnated with the joining material.Type: ApplicationFiled: June 25, 2021Publication date: October 5, 2023Inventors: Osamu YOSHIMOTO, Ryuichi ARAKAWA, Tomoo TANAKA
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Publication number: 20230303457Abstract: A joined body includes a first member and a second member which are joined together via a joining portion including a metal layer having a plurality of pores communicating with each other. The first member and the metal layer have respective through holes formed in the first member and the metal layer, respectively, and communicating with each other. A tubular member is disposed between an inner side portion of the through hole formed in the metal layer and an interior portion of the metal layer.Type: ApplicationFiled: June 25, 2021Publication date: September 28, 2023Inventors: Osamu YOSHIMOTO, Ryuichi ARAKAWA, Tomoo TANAKA
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Publication number: 20230226630Abstract: A joined body includes a first member, a second member, and a joining portion disposed therebetween and joining the first member and the second member. The joining portion includes a first joining layer on a side toward the first member and formed of a first joining material, a second joining layer on a side toward the second member and formed of a second joining material, and a metal layer therebetween and having a plurality of holes communicating with one another. The metal layer includes a first-joining-material-impregnated layer on a side toward the first joining layer and in which the plurality of holes are impregnated with the first joining material, a second-joining-material-impregnated layer on a side toward the second joining layer and in which the plurality of holes are impregnated with the second joining material, and an unfilled hole layer therebetween and in which the plurality of holes are void.Type: ApplicationFiled: June 11, 2021Publication date: July 20, 2023Inventors: Ryuichi ARAKAWA, Tomoo TANAKA, Osamu YOSHIMOTO
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Publication number: 20230119721Abstract: A noble metal tip for a spark plug according to the present invention contains iridium (Jr) in an amount of 50 mass % or more and aluminum (Al) in an amount of 0.1 mass % or more and 5 mass % or less, and further contains rhodium (Rh), wherein a metallographic structure comprised of fiber-like elements R is observed, and the fiber-like elements R of the metallographic structure have an average aspect ratio of 150 or more and have an average length of 25 ?m or less in a minor axis direction.Type: ApplicationFiled: February 2, 2021Publication date: April 20, 2023Applicant: NGK SPARK PLUG CO., LTD.Inventors: Osamu YOSHIMOTO, Tomoo TANAKA, Kengo HATTORI
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Patent number: 9783872Abstract: An electrode material for at least one of a center electrode (5) and a ground electrode (27) provided with a chip (31, 32) for use in a spark plug (1). The electrode material contains Ni as a principal component, and has a Si content of from 0.50% to 1.0% by mass, an Al content of from 0.2% to 2.0% by mass, a Cr content of from 12% to 34% by mass, a rare-earth element or the like content of from 0.03% to 0.2% by mass, a Fe content of more than 0% but not more than 20% by mass, a C content of not more than 0.10% by mass, and a Mn content of not more than 1.0% by mass. The total content of Si and Al is not less than 0.80% by mass, and less than one tenth of the Cr content.Type: GrantFiled: January 8, 2014Date of Patent: October 10, 2017Assignees: NGK SPARK PLUG CO., LTD., HITACHI METALS, LTD.Inventors: Osamu Yoshimoto, Tomonori Kanemaru, Takehito Kuno, Tomo-o Tanaka, Toshihiro Uehara
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Patent number: 9548593Abstract: A spark plug having a tip provided on at least one of a center electrode and a ground electrode. The spark plug includes a center electrode and a ground electrode disposed providing a gap with the center electrode. At least one of the center electrode and the ground electrode includes a tip forming the gap. The tip has a main constituent of Ir. The tip contains Rh of 7 mass % or more to 31 mass % or less, Ru of 5 mass % or more to 20 mass % or less, and Pt of one-twentieth or more to one-half or less of a Ru content.Type: GrantFiled: September 2, 2014Date of Patent: January 17, 2017Assignee: NGK SPARK PLUG CO., LTD.Inventors: Tomonori Kanemaru, Daisuke Sumoyama, Osamu Yoshimoto
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Publication number: 20160276811Abstract: A spark plug having a tip provided on at least one of a center electrode and a ground electrode. The spark plug includes a center electrode and a ground electrode disposed providing a gap with the center electrode. At least one of the center electrode and the ground electrode includes a tip forming the gap. The tip has a main constituent of Ir. The tip contains Rh of 7 mass % or more to 31 mass % or less, Ru of 5 mass % or more to 20 mass % or less, and Pt of one-twentieth or more to one-half or less of a Ru content.Type: ApplicationFiled: September 2, 2014Publication date: September 22, 2016Applicant: NGK SPARK PLUG CO., LTD.Inventors: Tomonori KANEMARU, Daisuke SUMOYAMA, Osamu YOSHIMOTO
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Patent number: 9343876Abstract: A spark plug including a center electrode; an insulator; a metallic shell; and a ground electrode, wherein at least one of the center electrode and the ground electrode has thereon an intermediate member which connects the center electrode or the ground electrode to a noble metal tip. The intermediate member has a tip-bonding portion to which the noble metal tip is bonded, and an electrode-bonding portion which has a diameter greater than that of the tip-bonding portion, and which is bonded to the center electrode or the ground electrode. The intermediate member contains nickel (Ni) as a main component, and also contains chromium (Cr) in an amount of 15 to 25 wt. %. The intermediate member contains, in a surface portion thereof, silicon (Si) in an amount per unit volume of 0.04 mg/mm3 to 0.12 mg/mm3, and aluminum (Al) in an amount per unit volume of 0.03 mg/mm3 to 0.10 mg/mm3.Type: GrantFiled: February 13, 2012Date of Patent: May 17, 2016Assignee: NGK SPARK PLUG CO., LTD.Inventors: Osamu Yoshimoto, Takehito Kuno, Tomoo Tanaka, Tomonori Kanemaru
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Patent number: 9240677Abstract: A spark plug is provided with: a central electrode; a ground electrode forming a spark discharge gap with the center electrode; and a chip welded to at least one of the electrodes. The chip has a thermal expansion coefficient smaller than a thermal expansion coefficient of the electrode to which the chip is welded, and the difference between the content A (mass %) of a noble metal component in the chip and the content B (mass %) of a noble metal component in the electrode (A?B) is 50 mass % or more. In an intermediate layer between the chip and the electrode, holes are present. When the length of a boundary between the chip and the intermediate layer is L (mm), and the length of the holes in a direction along the boundary of the chip and the intermediate layer is N (mm), 0.1?N/L?0.4.Type: GrantFiled: October 2, 2013Date of Patent: January 19, 2016Assignee: NGK SPARK PLUG CO., LTD.Inventor: Osamu Yoshimoto
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Publication number: 20150357797Abstract: A spark plug is provided with: a central electrode; a ground electrode forming a spark discharge gap with the center electrode; and a chip welded to at least one of the electrodes. The chip has a thermal expansion coefficient smaller than a thermal expansion coefficient of the electrode to which the chip is welded, and the difference between the content A (mass %) of a noble metal component in the chip and the content B (mass %) of a noble metal component in the electrode (A?B) is 50 mass % or more. In an intermediate layer between the chip and the electrode, holes are present. When the length of a boundary between the chip and the intermediate layer is L (mm), and the length of the holes in a direction along the boundary of the chip and the intermediate layer is N (mm), 0.1?N/L?0.4.Type: ApplicationFiled: October 2, 2013Publication date: December 10, 2015Applicant: NGK SPARK PLUG CO., LTD.Inventor: Osamu YOSHIMOTO
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Publication number: 20150340844Abstract: An electrode material for at least one of a center electrode (5) and a ground electrode (27) provided with a chip (31, 32) for use in a spark plug (1). The electrode material contains Ni as a principal component, and has a Si content of from 0.50% to 1.0% by mass, an Al content of from 0.2% to 2.0% by mass, a Cr content of from 12% to 34% by mass, a rare-earth element or the like content of from 0.03% to 0.2% by mass, a Fe content of more than 0% but not more than 20% by mass, a C content of not more than 0.10% by mass, and a Mn content of not more than 1.0% by mass. The total content of Si and Al is not less than 0.80% by mass, and less than one tenth of the Cr content.Type: ApplicationFiled: January 8, 2014Publication date: November 26, 2015Applicants: NGK SPARK PLUG CO., LTD., HITACHI METALS, LTD.Inventors: Osamu YOSHIMOTO, Tomonori KANEMARU, Takehito KUNO, Tomo-o TANAKA, Toshihiro UEHARA
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Patent number: 9109288Abstract: A fluorine gas generation system includes a plurality of fluorine gas supply systems and a controller. Each of the fluorine gas supply systems includes a fluorine gas generation apparatus. Each of the fluorine gas supply systems is connected to a CVD device group. The fluorine gas generation apparatus includes a fluorine gas generator and a buffer tank. An opening/closing valve is inserted through a piping. The other end of the piping is branched into a plurality of pipings. Each of the pipings is connected to CVD devices. Pipings in the adjacent fluorine gas supply systems are connected to each other via a piping. An opening/closing valve is inserted through each of the pipings.Type: GrantFiled: September 2, 2010Date of Patent: August 18, 2015Assignee: TOYO TANSO CO., LTD.Inventor: Osamu Yoshimoto
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Patent number: 9027524Abstract: A spark plug capable of preventing a separation of a noble metal tip and capable of extending a service-life of the spark plug.Type: GrantFiled: December 24, 2008Date of Patent: May 12, 2015Assignee: NGK Spark Plug Co., Ltd.Inventors: Mamoru Musasa, Akira Suzuki, Osamu Yoshimoto
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Patent number: 8952601Abstract: It is an object of the present invention to provide a spark plug having a ground electrode joined securely by electric resistance welding. The spark plug includes a cylindrical metal shell and a ground electrode joined by electric resistance welding to an end portion of the metal shell. The metal shell has a high hardness region formed with a Vickers hardness of 3×102 to 5×102 Hv in the end portion thereof in such a manner that the high hardness region, when viewed in cross section along a plane including an axis of the spark plug and an axis of the ground electrode, has a length d of 0.3 to 0.8 mm from a ground electrode side welding boundary to a metal shell side welding boundary in a direction of load applied during the electric resistance welding.Type: GrantFiled: December 22, 2011Date of Patent: February 10, 2015Assignee: NGK Spark Plug Co., Ltd.Inventors: Takehito Kuno, Osamu Yoshimoto, Tomoo Tanaka
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Patent number: 8922103Abstract: A spark plug (1) includes a metallic shell (3) and a ground electrode (27) resistance-welded to the metallic shell (3). The ground electrode (27) is formed from a metal material in which precipitates PR containing at least one of an oxide, an intermetallic compound, etc., are precipitated in grain boundaries. The diameter of an equivalent circle of a precipitate PR having the greatest area is 50 ?m or less, and the shortest distance between the precipitates PR is 2 ?m or greater. The area occupied by the precipitates PR on the section of the heat-affected zone 27A is equal to 65% or more the area occupied by the precipitates PR (the diameter of an equivalent circle of a precipitate PR having the greatest area) on a section of the normal zone 27B.Type: GrantFiled: November 26, 2010Date of Patent: December 30, 2014Assignee: NGK Spark Plug Co., Ltd.Inventors: Osamu Yoshimoto, Tomo-o Tanaka, Norihide Kachikawa
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Patent number: 8866370Abstract: A spark plug including a center electrode and a ground electrode having a core portion and an outer layer covering the core portion, the core portion being formed from a material having a thermal conductivity higher than that of the outer layer. At least a portion in which thickness of the outer layer is 0.5 mm or less is present at a cross-section perpendicular to a direction in which the ground electrode is extended. Further, the composition of the electrode material forming the outer layer is as follows: Ni is 96 mass % or more, total of at least one kind selected from Y and rare earth elements is 0.05 mass % or more, Al is 0.5 mass % or less, and Si is 0.5 mass % or more and 1.5 mass % or less, where the total of Ni, Y, rare earth elements, Al, Si does not exceed 100 mass %.Type: GrantFiled: January 19, 2011Date of Patent: October 21, 2014Assignee: NGK Spark Plug Co., Ltd.Inventors: Tsutomu Shibata, Takaaki Kikai, Kenji Nunome, Osamu Yoshimoto
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Patent number: 8810120Abstract: A spark plug having a center electrode; a ground electrode provided so as to form a gap between the ground electrode and the center electrode; and a tip provided on at least one of a distal end portion of the ground electrode and a front end portion of the center electrode, the end portions facing each other, characterized in that the tip contains an element group M (M consists of at least one species of Pt and Rh) in an amount of 3 mass % to 35 mass %, and an element group L (L consists of at least one species of Ir, Ru, and Pd) in an amount of 0 mass % to 15 mass %; the total amount of the element group M and the element group L is at most 35 mass %; and the total amount of Ni, the element group M, and the element group L is at least 94 mass %.Type: GrantFiled: April 17, 2012Date of Patent: August 19, 2014Assignee: NGK Spark Plug Co., Ltd.Inventors: Daisuke Sumoyama, Osamu Yoshimoto
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Publication number: 20140159564Abstract: A spark plug having a center electrode; a ground electrode provided so as to form a gap between the ground electrode and the center electrode; and a tip provided on at least one of a distal end portion of the ground electrode and a front end portion of the center electrode, the end portions facing each other, characterized in that the tip contains an element group M (M consists of at least one species of Pt and Rh) in an amount of 3 mass % to 35 mass %, and an element group L (L consists of at least one species of Ir, Ru, and Pd) in an amount of 0 mass % to 15 mass %; the total amount of the element group M and the element group L is at most 35 mass %; and the total amount of Ni, the element group M, and the element group L is at least 94 mass %.Type: ApplicationFiled: April 17, 2012Publication date: June 12, 2014Inventors: Daisuke Sumoyama, Osamu Yoshimoto
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Patent number: 8664842Abstract: A spark plug including a center electrode and a ground electrode having a gap between the center electrode and the ground electrode, the ground electrode has an outer layer which is formed from an Ni-based alloy and a core portion which is covered by the outer layer and formed from a material having a thermal conductivity higher than that of the outer layer. Further, the melting point of the Ni-based alloy forming the outer layer is 1150° C. or more and 1350° C. or less.Type: GrantFiled: January 11, 2011Date of Patent: March 4, 2014Assignee: NGK Spark Plug Co., Ltd.Inventors: Tomoo Tanaka, Tsutomu Shibata, Osamu Yoshimoto, Takaaki Kikai, Takehito Kuno, Kenji Nunome
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Patent number: 8624472Abstract: A ground electrode (27) and a noble-metal chip (32) are joined via a weld portion (42) formed by fusing and mixing an Ni alloy and a Pt alloy. A plurality of acicular or rhizoid microcracks (51) are formed in the weld portion (42). As viewed on a section of the weld portion (42), the average length of the microcracks is 50 ?m to 500 ?m, and the average aspect ratio (shorter dimension/longer dimension) of the microcracks is 0.05 or less. At least one of the Ni alloy used to form the ground electrode (27) and the Pt alloy used to form the noble-metal chip (32) contains as an additive at least one of elements belonging to Groups 3A and 4A of the Periodic Table and oxides of these elements.Type: GrantFiled: August 21, 2008Date of Patent: January 7, 2014Assignee: NGK Spark Plug Co., Ltd.Inventor: Osamu Yoshimoto