Patents by Inventor Yoshihiro Kuroda
Yoshihiro Kuroda 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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Patent number: 11912053Abstract: To provide a coating liquid for release layer with which a release layer having a small variation in the performance difference can be stably formed, to provide a method for producing a thermal transfer sheet using this coating liquid for release layer, and to provide a thermal transfer sheet having stable releasability. A thermal transfer sheet having a substrate, a release layer provided on the substrate, and a transfer layer provided on the release layer, wherein the transfer layer is provided peelably from the release layer, and the release layer contains a silsesquioxane.Type: GrantFiled: September 15, 2021Date of Patent: February 27, 2024Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kazuya Yoshida, Tomohiko Imoda, Yoshihiro Imakura, Yasuyuki Shouji, Daisuke Fukui, Ryoji Hattori, Koichiro Kuroda
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Patent number: 11040404Abstract: A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.Type: GrantFiled: September 13, 2019Date of Patent: June 22, 2021Assignees: SUMITOMO ELECTRIC HARDMETAL CORP., BIG DAISHOWA SEIKI CO., LTD.Inventors: Naoki Matsuda, Hideo Maeno, Chikara Kimura, Yoshihiro Kuroda, Takafumi Takami, Junichi Koyama, Masahiro Sasano
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Publication number: 20200406368Abstract: A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.Type: ApplicationFiled: September 13, 2019Publication date: December 31, 2020Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., BIG DAISHOWA SEIKI CO., LTD.Inventors: Naoki MATSUDA, Hideo MAENO, Chikara KIMURA, Yoshihiro KURODA, Takafumi TAKAMI, Junichi KOYAMA, Masahiro SASANO
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Patent number: 7985470Abstract: An object is to raise both the wear resistance and chipping resistance of diamond sintered compacts while taking advantage of the characteristics of highly chipping-resistant microfine-grain diamond sintered compacts. A sintered diamond layer 3 is formed by sintering diamond grains and a binder on a cemented carbide substrate 2. This sintered diamond layer 3 comprises a main diamond layer 4 and a Co-rich diamond layer 5 that is present between the main diamond layer 4 and the cemented carbide substrate 2 and that has a Co content larger than that of the main diamond layer 4; the main diamond layer has a residual compressive stress of 1.5 GPa to 3 GPa.Type: GrantFiled: February 2, 2007Date of Patent: July 26, 2011Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya
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Patent number: 7771847Abstract: To provide a high cBN content ratio sintered body that improves fatigue life of the machined part and has a longer tool lifespan than conventional cBN sintered body tools by suppressing the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual compression stress. That is a cBN sintered body according to the present invention is a cBN sintered body for high surface integrity machining having a cBN component of not less than 87% and not more than 99% by volume % and a thermal conductivity of 100 W/m·K or more; and the outermost surface of the cBN sintered body 1 is coated with a heat resistant film 2 having a thickness of 0.5 ?m to 12 ?m comprising a compound of at least one element selected from 4a, 5a, 6a group elements and Al, and at least one element selected from C, N, and O.Type: GrantFiled: May 30, 2006Date of Patent: August 10, 2010Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Satoru Kukino, Yoshihiro Kuroda, Tomohiro Fukaya, Katsumi Okamura
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Patent number: 7765902Abstract: It is an object to provide a cutting tool which can perform high-quality, high-efficiency machining of a workpiece such as hardened steel. The cutting tool includes a finishing cutting edge 6 which initially cuts into the workpiece, and superfinishing cutting edges 7 for finishing the workpiece cut by the finishing cutting edge. The superfinishing cutting edges 7 project from the finishing cutting edge by a predetermined amount B in such a direction that the depth of cut of the superfinishing cutting edges increases. Each superfinishing cutting edge includes a burnishing portion 7a having a predetermined width L in the feed direction of the tool, and a wiper portion 7b. The superfinishing cutting edges 7 burnish the finished surface formed by the finishing cutting edge, while removing a affected layer formed by the finishing cutting edge.Type: GrantFiled: March 29, 2006Date of Patent: August 3, 2010Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yoshihiro Kuroda, Satoru Kukino, Katsumi Okamura, Tomohiro Fukaya
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Patent number: 7758976Abstract: In high efficiency cutting of very hard and hard-to-cut ferrous materials, compared with conventional cBN sintered body tools, the fatigue life of the machined part is improved and a longer lasting tool is provided by controlling the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual of compression stress. The cBN sintered body related to the present invention has not less than 60% and not more than 95% of cBN components in volume, and has a thermal conductivity of 70 W/m·K or more; and the outermost surface thereof is coated with a heat resistant film comprising a compound of at least one element selected from 4a, 5a, 6a group elements and Al, and at least one element selected from C, N and O.Type: GrantFiled: May 30, 2006Date of Patent: July 20, 2010Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Satoru Kukino, Yoshihiro Kuroda, Tomohiro Fukaya, Katsumi Okamura
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Publication number: 20100112332Abstract: Provided are a diamond sintered body having higher strength and more excellent wear resistance than a conventional diamond sintered body, and a method for producing such a diamond sintered body. The diamond sintered body includes diamond particles, a binder, and a void. The diamond particles have a content of not less than 80% by volume but less than 98% by volume. The binder includes a solid solution containing at least one element selected from a group consisting of titanium, zirconium, vanadium, niobium, and chromium, carbon, and tungsten, as well as an iron group element. Neighboring ones of the diamond particles are bonded to one another. The method provides such a diamond sintered body.Type: ApplicationFiled: February 2, 2007Publication date: May 6, 2010Inventors: Yoshihiro Kuroda, Satoru Kukino, Minoru Yoshida, Tomohiro Fukaya
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Publication number: 20100088969Abstract: A diamond sinter which has higher hardness than conventional diamond sinters and is excellent in strength including chipping resistance and wearing resistance. The diamond sinter comprises diamond particles and a binder and is characterized in that the binder comprises: a solid solution comprising carbon, tungsten, and at least one element selected from the group consisting of titanium, zirconium, vanadium, niobium, and chromium; and an iron-group element represented by cobalt. It is further characterized in that adjacent diamond particles are bonded to each other.Type: ApplicationFiled: February 2, 2007Publication date: April 15, 2010Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya
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Publication number: 20090208301Abstract: An object is to raise both the wear resistance and chipping resistance of diamond sintered compacts while taking advantage of the characteristics of highly chipping-resistant microfine-grain diamond sintered compacts. A sintered diamond layer 3 is formed by sintering diamond grains and a binder on a cemented carbide substrate 2. This sintered diamond layer 3 comprises a main diamond layer 4 and a Co-rich diamond layer 5 that is present between the main diamond layer 4 and the cemented carbide substrate 2 and that has a Co content larger than that of the main diamond layer 4; the main diamond layer has a residual compressive stress of 1.5 GPa to 3 GPa.Type: ApplicationFiled: February 2, 2007Publication date: August 20, 2009Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya
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High-strength and highly-wear-resistant sintered diamond object and manufacturing method of the same
Patent number: 7553350Abstract: A high-strength and highly-wear-resistant sintered diamond object according to the present invention includes sintered diamond particle having an average particle size of not larger than 2 ?m and a binder phase as a remaining portion. The content of the sintered diamond particle in the sintered diamond object is not smaller than 80 volume % and not larger than 98 volume %. The binder phase contains at least one element selected from the group consisting of titanium and the like, of which content is not smaller than 0.5 mass % and less than 50 mass %, and contains cobalt, of which content is not smaller than 50 mass % and less than 99.5 mass %. A part of the element or the element as a whole is present as carbide particle having an average particle size of not larger than 0.8 ?m. A texture of the carbide particle is discontinuous, and adjacent diamond particles are bound to each other.Type: GrantFiled: July 26, 2005Date of Patent: June 30, 2009Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya -
Publication number: 20080292415Abstract: It is an object to provide a cutting tool which can perform high-quality, high-efficiency machining of a workpiece such as hardened steel. The cutting tool includes a finishing cutting edge 6 which initially cuts into the workpiece, and superfinishing cutting edges 7 for finishing the workpiece cut by the finishing cutting edge. The superfinishing cutting edges 7 project from the finishing cutting edge by a predetermined amount B in such a direction that the depth of cut of the superfinishing cutting edges increases. Each superfinishing cutting edge includes a burnishing portion 7a having a predetermined width L in the feed direction of the tool, and a wiper portion 7b. The superfinishing cutting edges 7 burnish the finished surface formed by the finishing cutting edge, while removing a affected layer formed by the finishing cutting edge.Type: ApplicationFiled: March 29, 2006Publication date: November 27, 2008Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yoshihiro Kuroda, Satoru Kukino, Katsumi Okamura, Tomohiro Fukaya
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Publication number: 20080286558Abstract: To provide a high cBN content ratio sintered body that improves fatigue life of the machined part and has a longer tool lifespan than conventional cBN sintered body tools by suppressing the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual compression stress. That is a cBN sintered body according to the present invention is a cBN sintered body for high surface integrity machining having a cBN component of not less than 87% and not more than 99% by volume % and a thermal conductivity of 100 W/m·K or more; and the outermost surface of the cBN sintered body 1 is coated with a heat resistant film 2 having a thickness of 0.5 ?m to 12 ?m comprising a compound of at least one element selected from 4a, 5a, 6a group elements and Al, and at least one element selected from C, N, and O.Type: ApplicationFiled: May 30, 2006Publication date: November 20, 2008Inventors: Satoru Kukino, Yoshihiro Kuroda, Tomohiro Fukaya, Katsumi Okamura
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Publication number: 20080254282Abstract: In high efficiency cutting of very hard and hard-to-cut ferrous materials, compared with conventional cBN sintered body tools, the fatigue life of the machined part is improved and a longer lasting tool is provided by controlling the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual of compression stress. The cBN sintered body related to the present invention has not less than 60% and not more than 95% of cBN components in volume, and has a thermal conductivity of 70 W/m·K or more; and the outermost surface thereof is coated with a heat resistant film comprising a compound of at least one element selected from 4a, 5a, 6a group elements and Al, and at least one element selected from C, N and O.Type: ApplicationFiled: May 30, 2006Publication date: October 16, 2008Inventors: Satoru Kukino, Yoshihiro Kuroda, Tomohiro Fukaya, Katsumi Okamura
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High-Strength and Highly-Wear-Resistant Sintered Diamond Object and Manufacturing Method of the Same
Publication number: 20080066388Abstract: A high-strength and highly-wear-resistant sintered diamond object according to the present invention includes sintered diamond particle having an average particle size of not larger than 2 ?m and a binder phase as a remaining portion. The content of the sintered diamond particle in the sintered diamond object is not smaller than 80 volume % and not larger than 98 volume %. The binder phase contains at least one element selected from the group consisting of titanium and the like, of which content is not smaller than 0.5 mass % and less than 50 mass %, and contains cobalt, of which content is not smaller than 50 mass % and less than 99.5 mass %. A part of the element or the element as a whole is present as carbide particle having an average particle size of not larger than 0.8 ?m. A texture of the carbide particle is discontinuous, and adjacent diamond particles are bound to each other.Type: ApplicationFiled: July 26, 2005Publication date: March 20, 2008Inventors: Yoshihiro Kuroda, Satoru Kukino, Tomohiro Fukaya -
Publication number: 20030133763Abstract: The present invention provides a cutting insert, a rotating cutting tool holding said cutting insert and a cutting method using the tool which is able to prevent the occurrence of burrs and to cut a smooth finished surface.Type: ApplicationFiled: June 26, 2002Publication date: July 17, 2003Inventors: Yoshihiro Kuroda, Ueda Joji, Sahashi Toshiyuki, Yoshinaga Miki, Obata Kazushi, Maki Hironobu
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Patent number: 6528159Abstract: A diamond sintered body tool (20) having superior adhesion resistance, chipping resistance and high strength includes a tool base material (22) including a diamond sintered body, and a surface layer (21) formed on a surface of the tool base material (22). The surface layer (21) includes at least one of silicon, a silicon oxide, a silicon carbide, a silicon nitride and a solid solution thereof. The tool base material (22) has an inner portion (22b) including a first content of an iron group metal, and a surface portion (22a) surrounding the inner portion (22b ) and including a second content of the iron group metal lower than the first content.Type: GrantFiled: September 1, 2000Date of Patent: March 4, 2003Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yasuyuki Kanada, Yoshihiro Kuroda, Noboru Yamazaki, Yasunobu Ogata, Kunihiro Tomita, Tetsuo Nakai, Makoto Abe
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Patent number: D513013Type: GrantFiled: June 17, 2004Date of Patent: December 20, 2005Assignee: Kitagawa Iron Works Co. Ltd.Inventors: Terumi Fujiki, Yoshihiro Kuroda, Hiroki Miyagaki
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Patent number: D515104Type: GrantFiled: June 17, 2004Date of Patent: February 14, 2006Assignee: Kabushiki Kaisha Kitagawa TekkoshoInventors: Terumi Fujiki, Yoshihiro Kuroda, Hiroki Miyagaki