Patents by Inventor Norihiro Takanashi
Norihiro Takanashi 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: 8133576Abstract: A coated cutting insert according to the present invention includes a substrate, a base layer formed on the substrate, and an indicating layer formed on a part of the base layer. The base layer exhibits a color different from that of the indicating layer. The indicating layer is formed on the base layer, in at least a part of a surface including a cutting-edge portion and a rake face except for a flank face. When a surface relative roughness Ra of a breaker recess portion or a land portion of the rake face is set to A?m and a surface relative roughness Ra of the flank face is set to B?m, relation of B/A?1 is established.Type: GrantFiled: November 25, 2005Date of Patent: March 13, 2012Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Patent number: 8012611Abstract: The present invention relates to a surface-coated cutting tool comprising a substrate and a coating formed on the substrate, the coating includes a first coating of TiCN and a second coating of ?-type Al2O3, the first coating is located between the substrate and the aforementioned second coating, and the second coating has compressive stress S1 in an area A1 spreading from an insert ridge portion in the direction of a rake face and the direction of a flank face with distances of at least 0.5 mm respectively and has tensile stress S2 in an area A2 other than this area A1, while compressive stress S1 and tensile stress S2 are defined by the following expression (I): 400 MPa?|S1?S2|?3500 Mpa ??(I).Type: GrantFiled: October 24, 2005Date of Patent: September 6, 2011Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Patent number: 7972714Abstract: The present invention relates to a coated cutting tool (1) including a substrate (8) and a coating (9) formed on the substrate (8), wherein the coating (9) includes a first coating (10) composed of TiCN and a second coating (11) composed of ?-Al2O3, the first coating (10) is positioned between the substrate (8) and the second coating (11) and has tensile stress S1, the second coating (11) has compressive stress S2, and the tensile stress S1 and the compressive stress S2 are defined by the following equation (I): 400 MPa?|S2?S1|?3500 MPa??(I).Type: GrantFiled: December 9, 2005Date of Patent: July 5, 2011Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Patent number: 7837416Abstract: An indexable cutting insert (1) of the present invention includes at least one face (2), at least two flanks (3), at least one edge line (4), at least one corner (9), and a base layer having a different color from a use-state indicating layer. The use-state indicating layer is formed on at least one of the flanks (3) so that the use-state indicating layer is formed on the base layer over the entire surface or a part of a region A2 excluding at least one region A1 of 2 mm2 containing at least one corner (9).Type: GrantFiled: July 24, 2006Date of Patent: November 23, 2010Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura
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Patent number: 7803464Abstract: A surface-coated cutting tool comprising a substrate, and a coating formed thereon, characterized in that the coating includes a first coating containing TiCN and a second coating containing ?-type Al2O3, the first coating is interposed between the substrate and the second coating, and the second coating has compressive stress S1 on the rake face and tensile stress S2 on the flank face, with the compressive stress S1 and the tensile stress S2 being defined by the following expression; 441 MPa?|S1?S2|?3500 MPa.Type: GrantFiled: November 16, 2005Date of Patent: September 28, 2010Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Publication number: 20090297835Abstract: The present invention relates to a coated cutting tool (1) including a substrate (8) and a coating (9) formed on the substrate (8), wherein the coating (9) includes a first coating (10) composed of TiCN and a second coating (ii) composed of ?-Al2O3, the first coating (10) is positioned between the substrate (8) and the second coating (11) and has tensile stress S1, the second coating (11) has compressive stress S2, and the tensile stress S1 and the compressive stress S2 are defined by the following equation (I): 400 MPa?|S2?S1|?3500 MPa??(I)Type: ApplicationFiled: December 9, 2005Publication date: December 3, 2009Applicant: Sumitomo Electric Hardmetal Corp.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Publication number: 20090232611Abstract: An indexable cutting insert (1) of the present invention includes at least one face (2), at least two flanks (3), at least one edge line (4), at least one corner (9), and a base layer having a different color from a use-state indicating layer. The use-state indicating layer is formed on at least one of the flanks (3) so that the use-state indicating layer is formed on the base layer over the entire surface or a part of a region A2 excluding at least one region A1 of 2 mm2 containing at least one corner (9).Type: ApplicationFiled: July 24, 2006Publication date: September 17, 2009Applicant: SUMITOMO ELECTRIC HARDMETAL CORPInventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura
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Patent number: 7553113Abstract: The present invention provides an indexable insert (1) which includes a body (8), a base layer disposed on the body (8), and a wear-indicating layer disposed on a part of the base layer, wherein at least one surface of the body (8) serves as a rake face (2), at least one other surface of the body serves as a flank face (3), the rake face (2) being connected to the flank face (3) with a cutting edge (4) therebetween, the base layer has a color different from that of the wear-indicating layer, and the wear-indicating layer is disposed on the rake face and on the base layer entirely or partially in a region A2 other than a region A1 that extends to a distance of 0.2 mm or more and less than 4.0 mm from the cutting edge.Type: GrantFiled: December 15, 2005Date of Patent: June 30, 2009Assignee: Sumitomo Electric Industries, LtdInventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Patent number: 7544024Abstract: The present invention relates to a coated cutting insert having a substrate, a base layer which is formed on the substrate and an indicating layer which is formed on a portion of the base layer, characterized in that in this substrate, at least one surface serves as a rake face, at least one other surface serves as a flank face, and a ridge where the rake face and the flank face cross serves as a cutting edge, the base layer has a color which is different from that of the above described indicating layer, and this indicating layer is formed on the flank face, and on the base layer over an entirety or a portion of a region excluding a region extending from the cutting edge in the vertical direction with a distance of no less than 0.2 mm and less than 3.0 mm.Type: GrantFiled: October 20, 2005Date of Patent: June 9, 2009Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura
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Publication number: 20080292905Abstract: A surface-coated cutting tool comprising a substrate, and a coating formed thereon, characterized in that the coating includes a first coating containing TiCN and a second coating containing ?-type Al2O3, the first coating is interposed between the substrate and the second coating, and the second coating has compressive stress S1 on the rake face and tensile stress S2 on the flank face, with the compressive stress S1 and the tensile stress S2 being defined by the following expression; 441 MPa?|S1?S2|?3500 MPa . . . .Type: ApplicationFiled: November 16, 2005Publication date: November 27, 2008Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Publication number: 20080131218Abstract: The present invention provides an indexable insert (1) which includes a body (8), a base layer disposed on the body (8), and a wear-indicating layer disposed on a part of the base layer, wherein at least one surface of the body (8) serves as a rake face (2), at least one other surface of the body serves as a flank face (3), the rake face (2) being connected to the flank face (3) with a cutting edge (4) therebetween, the base layer has a color different from that of the wear-indicating layer, and the wear-indicating layer is disposed on the rake face and on the base layer entirely or partially in a region A2 other than a region A1 that extends to a distance of 0.2 mm or more and less than 4.0 mm from the cutting edge.Type: ApplicationFiled: December 15, 2005Publication date: June 5, 2008Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumo Okuno
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Publication number: 20070298280Abstract: The present invention is directed to a surface-coated cutting tool including a substrate and a coating layer formed on the substrate. The coating layer includes a first coating layer composed of titanium boronitride or titanium boron-oxynitride and a second coating layer formed from at least one selected from the group consisting of aluminum oxide, zirconium oxide, hafnium oxide and a solid solution mainly including two or more of these components. The first coating layer is located directly under the second coating layer, between the substrate and the second coating layer. The second coating layer has compressive stress at least in an area involved with cutting.Type: ApplicationFiled: December 6, 2005Publication date: December 27, 2007Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura
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Publication number: 20070298230Abstract: A coated cutting insert according to the present invention includes a substrate, a base layer formed on the substrate, and an indicating layer formed on a part of the base layer. The base layer exhibits a color different from that of the indicating layer. The indicating layer is formed on the base layer, in at least a part of a surface including a cutting-edge portion and a rake face except for a flank face. When a surface relative roughness Ra of a breaker recess portion or a land portion of the rake face is set to A?m and a surface relative roughness Ra of the flank face is set to B?m, relation of B/A?1 is established.Type: ApplicationFiled: November 25, 2005Publication date: December 27, 2007Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Publication number: 20070292670Abstract: The present invention relates to a surface-coated cutting tool comprising a substrate and a coating formed on the substrate, the coating includes a first coating of TiCN and a second coating of ?-type Al2O3, the first coating is located between the substrate and the aforementioned second coating, and the second coating has compressive stress S1 in an area A1 spreading from an insert ridge portion in the direction of a rake face and the direction of a flank face with distances of at least 0.Type: ApplicationFiled: October 24, 2005Publication date: December 20, 2007Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yoshio Okada, Naoya Omori, Minoru Itoh, Norihiro Takanashi, Shinya Imamura, Susumu Okuno
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Publication number: 20070248424Abstract: The present invention relates to a coated cutting insert having a substrate, a base layer which is formed on the substrate and an indicating layer which is formed on a portion of the base layer, characterized in that in this substrate, at least one surface serves as a rake face, at least one other surface serves as a flank face, and a ridge where the rake face and the flank face cross serves as a cutting edge, the base layer has a color which is different from that of the above described indicating layer, and this indicating layer is formed on the flank face, and on the base layer over an entirety or a portion of a region excluding a region extending from the cutting edge in the vertical direction with a distance of no less than 0.2 mm and less than 3.0 mm.Type: ApplicationFiled: October 20, 2005Publication date: October 25, 2007Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Norihiro Takanashi, Shinya Imamura
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Patent number: D572279Type: GrantFiled: January 5, 2007Date of Patent: July 1, 2008Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Norihiro Takanashi, Shigenori Emoto, Akio Nakamura
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Patent number: D585467Type: GrantFiled: May 19, 2008Date of Patent: January 27, 2009Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Norihiro Takanashi, Shigenori Emoto, Akio Nakamura
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Patent number: D589542Type: GrantFiled: May 19, 2008Date of Patent: March 31, 2009Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Norihiro Takanashi, Shigenori Emoto, Akio Nakamura