Patents by Inventor Katsuaki Ogawa
Katsuaki Ogawa 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: 11549408Abstract: Provided is a valve seat insert for an internal combustion engine, which has both an excellent heat dissipation property and excellent wear resistance. The valve seat insert for an internal combustion engine is used while being press-fitted into an aluminum alloy cylinder head, is made of an iron-based sintered alloy, is formed by integrating two layers of a functional member side layer and a supporting member side layer, and has a plating film on at least an outer peripheral side. The plating film is preferably a copper plating film. The plating film is a plating film having a thickness of 1 to 100 ?m and a hardness of 50 to 300 HV, and the hardness of the plating film is adjusted so as to satisfy a range of 1.05 to 4.5 times hardness of the cylinder head in Vickers hardness HV. Pores contained in the valve seat insert are preferably sealed with a curable resin before plating treatment.Type: GrantFiled: May 14, 2019Date of Patent: January 10, 2023Assignee: NIPPON PISTON RING CO., LTD.Inventors: Ayato Oikawa, Kiyoshi Suwa, Katsuaki Ogawa, Hiroshi Oshige, Kenichi Sato
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Publication number: 20210215071Abstract: Provided is a valve seat insert for an internal combustion engine, which has both an excellent heat dissipation property and excellent wear resistance. The valve seat insert for an internal combustion engine is used while being press-fitted into an aluminum alloy cylinder head, is made of an iron-based sintered alloy, is formed by integrating two layers of a functional member side layer and a supporting member side layer, and has a plating film on at least an outer peripheral side. The plating film is preferably a copper plating film. The plating film is a plating film having a thickness of 1 to 100 ?m and a hardness of 50 to 300 HV, and the hardness of the plating film is adjusted so as to satisfy a range of 1.05 to 4.5 times hardness of the cylinder head in Vickers hardness HV. Pores contained in the valve seat insert are preferably sealed with a curable resin before plating treatment.Type: ApplicationFiled: May 14, 2019Publication date: July 15, 2021Applicant: Nippon Piston Ring Co., Ltd.Inventors: Ayato OIKAWA, Kiyoshi SUWA, Katsuaki OGAWA, Hiroshi OSHIGE, Kenichi SATO
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Patent number: 10457885Abstract: Provided are a coating film, a manufacturing method for the same, and a PVD device that not only sufficiently improve the balance of low-friction properties and wear resistance, but also improve chipping resistance and peeling resistance. This film is coated on a substrate surface, wherein the coating film has a hard carbon that presents relatively black and white when observed in a cross-sectional bright-field TEM image, a mesh-shaped hard carbon layer is formed using a PVD method, said layer having white-colored hard carbon in a mesh shape extending in the thickness direction and black-colored hard carbon dispersed into the cavities in the mesh, and the ID/IG ratio is 1-6 when the mesh-shaped hard carbon layer is measured using Raman spectroscopy, said ratio being the ratio of the Raman spectrum D band peak area intensity and G band peak area intensity.Type: GrantFiled: September 17, 2014Date of Patent: October 29, 2019Assignees: NIPPON ITF, INC., NIPPON PISTON RING CO., LTD.Inventors: Hideki Moriguchi, Tadashi Saito, Yoshikazu Tanaka, Akinori Shibata, Tetsumi Arahi, Katsuaki Ogawa, Takahiro Okazaki, Hiroyuki Sugiura, Yoshihiro Ito
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Patent number: 10451184Abstract: A sliding member includes: a base; a chromium-based hard chromium plated layer formed on the surface of the base; a hard carbon layer that is mainly composed of carbon element and is formed on the hard chromium plated layer. The hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm. A method for producing the sliding member involves heating the surface of the base on which the chromium-based hard chromium plated layer has been formed at a temperature of 250° C. or more so that the hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm, and thereafter forming the hard carbon layer mainly composed of carbon element on the hard chromium plated layer.Type: GrantFiled: August 9, 2017Date of Patent: October 22, 2019Assignee: NISSAN MOTOR CO., LTD.Inventors: Tsuyoshi Higuchi, Yutaka Mabuchi, Hideaki Kamiyama, Katsuaki Ogawa
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Patent number: 10428416Abstract: Provided are a coating film, a manufacturing method for the same, and a PVD device that not only sufficiently improve the balance of low-friction properties and wear resistance, but also improve chipping resistance (defect resistance) and peeling resistance. This coating film coats a substrate surface, wherein a hard carbon layer is formed extending in columns-shape perpendicular to the substrate when observed in a cross-sectional bright-field TEM image, the hard carbon layer is formed using a PVD method, and the ID/IG ratio is 1-6 when the hard carbon layer is measured using Raman spectroscopy, said ratio being the ratio of the Raman spectrum D band peak area intensity and G band peak area intensity.Type: GrantFiled: September 17, 2014Date of Patent: October 1, 2019Assignees: NIPPON ITF, INC., NIPPON PISTON RING CO., LTD.Inventors: Hideki Moriguchi, Tadashi Saito, Yoshikazu Tanaka, Tetsumi Arahi, Katsuaki Ogawa, Takahiro Okazaki, Hiroyuki Sugiura, Yoshihiro Ito
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Publication number: 20170335964Abstract: A sliding member includes: a base; a chromium-based hard chromium plated layer formed on the surface of the base; a hard carbon layer that is mainly composed of carbon element and is formed on the hard chromium plated layer. The hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm. A method for producing the sliding member involves heating the surface of the base on which the chromium-based hard chromium plated layer has been formed at a temperature of 250° C. or more so that the hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm, and thereafter forming the hard carbon layer mainly composed of carbon element on the hard chromium plated layer.Type: ApplicationFiled: August 9, 2017Publication date: November 23, 2017Applicant: NISSAN MOTOR CO., LTD.Inventors: Tsuyoshi HIGUCHI, Yutaka Mabuchi, Hideaki Kamiyama, Katsuaki Ogawa
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Publication number: 20170306257Abstract: Provided are a coating film, a manufacturing method for the same, and a PVD device that not only sufficiently improve the balance of low-friction properties and wear resistance, but also improve chipping resistance and peeling resistance. This film is coated on a substrate surface, wherein the coating film has a hard carbon that presents relatively black and white when observed in a cross-sectional bright-field TEM image, a mesh-shaped hard carbon layer is formed using a PVD method, said layer having white-colored hard carbon in a mesh shape extending in the thickness direction and black-colored hard carbon dispersed into the cavities in the mesh, and the ID/IG ratio is 1-6 when the mesh-shaped hard carbon layer is measured using Raman spectroscopy, said ratio being the ratio of the Raman spectrum D band peak area intensity and G band peak area intensity.Type: ApplicationFiled: September 17, 2014Publication date: October 26, 2017Applicants: NIPPON ITF, INC., NIPPON PISTON RING CO., LTD.Inventors: Hideki MORIGUCHI, Tadashi SAITO, Yoshikazu TANAKA, Akinori SHIBATA, Tetsumi ARAHI, Katsuaki OGAWA, Takahiro OKAZAKI, Hiroyuki SUGIURA, Yoshihiro ITO
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Publication number: 20170283935Abstract: Provided are a coating film, a manufacturing method for the same, and a PVD device that not only sufficiently improve the balance of low-friction properties and wear resistance, but also improve chipping resistance (defect resistance) and peeling resistance. This coating film coats a substrate surface, wherein a hard carbon layer is formed extending in columns-shape perpendicular to the substrate when observed in a cross-sectional bright-field TEM image, the hard carbon layer is formed using a PVD method, and the ID/IG ratio is 1-6 when the hard carbon layer is measured using Raman spectroscopy, said ratio being the ratio of the Raman spectrum D band peak area intensity and G band peak area intensity.Type: ApplicationFiled: September 17, 2014Publication date: October 5, 2017Applicants: NIPPON ITF, INC., NIPPON PISTON RING CO., LTD.Inventors: Hideki MORIGUCHI, Tadashi SAITO, Yoshikazu TANAKA, Tetsumi ARAHI, Katsuaki OGAWA, Takahiro OKAZAKI, Hiroyuki SUGIURA, Yoshihiro ITO
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Patent number: 9759323Abstract: A sliding member includes: a base; a chromium-based hard chromium plated layer formed on the surface of the base; a hard carbon layer that is mainly composed of carbon element and is formed on the hard chromium plated layer. The hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm. A method for producing the sliding member involves heating the surface of the base on which the chromium-based hard chromium plated layer has been formed at a temperature of 250° C. or more so that the hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm, and thereafter forming the hard carbon layer mainly composed of carbon element on the hard chromium plated layer.Type: GrantFiled: December 20, 2013Date of Patent: September 12, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Tsuyoshi Higuchi, Yutaka Mabuchi, Hideaki Kamiyama, Katsuaki Ogawa
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Patent number: 9506138Abstract: The second compression ring is formed such that the outer peripheral surface shape has a tapered face, and the radial cross-sectional shape is a rectangular ring, a scraper ring, or a Napier ring, and has a piston ring base and a hard film provided at least on an outer peripheral sliding surface thereof. The piston ring base is composed of a low-alloy steel or carbon steel having a Vickers hardness of Hv 350 Hv 550. The outer peripheral sliding surface is formed so that the axial length is from 0.01 to 0.30 mm between the outer edge end part of the tapered outer peripheral sliding surface and an imaginary line contacting with a lower end surface where a curved surface having a diameter that decreases gradually inward from the outer edge end part toward the lower end in the axial direction is parallel to a ring underside.Type: GrantFiled: April 23, 2015Date of Patent: November 29, 2016Assignee: Nippon Piston Ring Co., Ltd.Inventors: Hiroyuki Sugiura, Atsushi Chiba, Makoto Kajiwara, Kazuhiro Fujimura, Katsuaki Ogawa, Kazuhiro Sameshima
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Publication number: 20150362072Abstract: A sliding member includes: a base; a chromium-based hard chromium plated layer formed on the surface of the base; a hard carbon layer that is mainly composed of carbon element and is formed on the hard chromium plated layer. The hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm. A method for producing the sliding member involves heating the surface of the base on which the chromium-based hard chromium plated layer has been formed at a temperature of 250° C. or more so that the hydrogen concentration of the hard chromium plated layer is equal to or less than 150 mass ppm, and thereafter forming the hard carbon layer mainly composed of carbon element on the hard chromium plated layer.Type: ApplicationFiled: December 20, 2013Publication date: December 17, 2015Applicant: NISSAN MOTOR CO., LTD.Inventors: Tsuyoshi HIGUCHI, Yutaka MABUCHI, Hideaki KAMIYAMA, Katsuaki OGAWA
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Publication number: 20150225836Abstract: The second compression ring is formed such that the outer peripheral surface shape has a tapered face, and the radial cross-sectional shape is a rectangular ring, a scraper ring, or a Napier ring, and has a piston ring base and a hard film provided at least on an outer peripheral sliding surface thereof. The piston ring base is composed of a low-alloy steel or carbon steel having a Vickers hardness of Hv 350 Hv 550. The outer peripheral sliding surface is formed so that the axial length is from 0.01 to 0.30 mm between the outer edge end part of the tapered outer peripheral sliding surface and an imaginary line contacting with a lower end surface where a curved surface having a diameter that decreases gradually inward from the outer edge end part toward the lower end in the axial direction is parallel to a ring underside.Type: ApplicationFiled: April 23, 2015Publication date: August 13, 2015Inventors: Hiroyuki SUGIURA, Atsushi CHIBA, Makoto KAJIWARA, Kazuhiro FUJIMURA, Katsuaki OGAWA, Kazuhiro SAMESHIMA
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Publication number: 20130328274Abstract: The second compression ring is formed such that the outer peripheral surface shape has a tapered face, and the radial cross-sectional shape is a rectangular ring, a scraper ring, or a Napier ring, and has a piston ring base and a hard film provided at least on an outer peripheral sliding surface thereof. The piston ring base is composed of a low-alloy steel or carbon steel having a Vickers hardness of Hv 350 Hv 550. The outer peripheral sliding surface is formed so that the axial length is from 0.01 to 0.30 mm between the outer edge end part of the tapered outer peripheral sliding surface and an imaginary line contacting with a lower end surface where a curved surface having a diameter that decreases gradually inward from the outer edge end part toward the lower end in the axial direction is parallel to a ring underside.Type: ApplicationFiled: February 27, 2012Publication date: December 12, 2013Applicant: NIPPON PISTON RING CO., LTD.Inventors: Hiroyuki Sugiura, Atsushi Chiba, Makoto Kajiwara, Kazuhiro Fujimura, Katsuaki Ogawa, Kazuhiro Sameshima
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Patent number: 8592050Abstract: A piston ring includes: a refined steel including: carbon C in a range of 0.20% mass to 0.90% mass, silicon Si in a range of 0.10% mass to less than 0.60% mass, manganese Mn in a range of 0.20% mass to 1.50% mass, chromium Cr in a range of 0.30% mass to 2.00% mass, and a remnant including: iron Fe, and an unavoidable impurity. A parameter A calculated from the following expression (1) based on contents of the Si, Mn and Cr is 9.0 or less: parameter A=8.8 Si+1.6 Mn+1.7 Cr—expression (1). A parameter B calculated from the following expression (2) based on contents of the C, Si, Mn and Cr is 10.8 or more: parameter B=36 C+4.2 Si+3.8 Mn+4.5 Cr—expression (2).Type: GrantFiled: March 3, 2009Date of Patent: November 26, 2013Assignees: Nissan Motor Co., Ltd., Nippon Piston Ring Co., Ltd.Inventors: Junpei Ogawa, Takaaki Kondou, Tomonori Miyazawa, Toyoki Iguchi, Takuma Suzuki, Takeshi Makita, Katsuaki Ogawa, Takahiro Okazaki
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Publication number: 20130049305Abstract: An internal combustion engine oil ring which stably retains, for a long period, the function of scraping excess oil from a cylinder inner wall surface and letting the excess oil flow down to an underside of a piston and ensures reduction in the amount of oil consumption when an internal combustion engine is driven. An internal combustion engine oil ring is provided, whose main body includes, along an inner peripheral surface, a coil expander receiving recess having a generally semicircular shape in cross-section in an oil ring axial direction, an inner peripheral surface of the coil expander receiving recess has an oil return groove formed along an inner peripheral direction for smoothly returning scraped oil to an underside of a piston, and an outer peripheral shape of the groove is composed of a straight line and a curved line continuous therewith in cross-section in the oil ring axial direction.Type: ApplicationFiled: April 19, 2011Publication date: February 28, 2013Applicant: NIPPON PISTON RING CO., LTDInventors: Mamoru Miyamoto, Shiro Shibata, Hiromichi Yokokawa, Katsuaki Ogawa
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Publication number: 20100319647Abstract: An object of the present invention is to provide a cylinder structure reduced in mutual damage caused by a sliding operation of a piston ring and a cylinder liner when the piston ring having a linear expansion property which follows linear expansion of the cylinder liner made of an aluminum alloy is used. In order to achieve the object, a combination structure of the piston ring and the cylinder liner for an internal combustion engine described below is employed. In the cylinder liner for an internal combustion engine, the inner circumferential surface satisfies the conditions, a ten-point height of roughness profile (RzJIS94) of 0.5 ?m to 1.0 ?m, a core roughness depth (Rk) of 0.2 ?m to 0.4 ?m, a reduced peak height (Rpk) of 0.05 ?m to 0.1 ?m and a reduced valley depths (Rvk) of 0.08 ?m to 0.2 ?m. In the piston ring, the sliding surface against to an inner circumferential surface in the cylinder liner satisfies the conditions, a ten-point height of roughness profile (RzJIS94) of not more than 1.Type: ApplicationFiled: November 27, 2008Publication date: December 23, 2010Applicant: NIPPON PISTON RING CO., LTD.Inventors: Katsuaki Ogawa, Tsugane Hirase
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Publication number: 20090226756Abstract: A piston ring includes: a refined steel including: carbon C in a range of 0.20% mass to 0.90% mass, silicon Si in a range of 0.10% mass to less than 0.60% mass, manganese Mn in a range of 0.20% mass to 1.50% mass, chromium Cr in a range of 0.30% mass to 2.00% mass, and a remnant including: iron Fe, and an unavoidable impurity. A parameter A calculated from the following expression (1) based on contents of the Si, Mn and Cr is 9.0 or less: parameter A=8.8 Si+1.6 Mn+1.7 Cr—expression (1). A parameter B calculated from the following expression (2) based on contents of the C, Si, Mn and Cr is 10.8 or more: parameter B=36 C+4.2 Si+3.8 Mn+4.5 Cr—expression (2).Type: ApplicationFiled: March 3, 2009Publication date: September 10, 2009Inventors: Junpei OGAWA, Takaaki Kondou, Tomonori Miyazawa, Toyoki Iguchi, Takuma Suzuki, Takeshi Makita, Katsuaki Ogawa, Takahiro Okazaki
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Patent number: 7493882Abstract: A combination of a cylinder liner and a piston ring, wherein the cylinder liner includes, silicon: 23.0-28.0% by weight, magnesium: 0.80-2.0% by weight, copper: 3.0-4.5% by weight, iron: 0.25% by weight or less, nickel: 0.01% by weight or less, wherein surface roughness profile of the inner circumference surface has Rz=0.5 to 1.0 ?m, Rk=0.2 to 0.4 ?m, Rpk=0.05 to 0.1 ?m, Rvk=0.08 to 0.2 ?m, wherein the piston ring includes carbon: 0.6-0.7% by weight, chrome: 13-14% by weight, molybdenum: 0.2-0.4% by weight, silicon: 0.25-0.50% by weight, manganese: 0.2-0.5% by weight, and wherein carbides with the diameter of 5.0 ?m and less are 4-10%.Type: GrantFiled: August 30, 2007Date of Patent: February 24, 2009Assignee: Nippon Piston Ring Co., Ltd.Inventors: Iwao Hiraishi, Katsuaki Ogawa, Hiromi Ishikawa, Tsugane Hirase, Kazuhiro Sameshima
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Publication number: 20080053396Abstract: The disclosed is a combination of a cylinder liner and a piston ring which contacts to a inner circumference surface of the cylinder liner at the pressure of 0.03 to 0.2 MPa, wherein the composition of the cylinder liner includes, silicon: 23.0 to 28.0% by weight, magnesium: 0.80 to 2.0% by weight, copper: 3.0 to 4.5% by weight, iron: 0.25% by weight or less, nickel: 0.01% by weight or less, and the rest: unavoidable impurities and aluminum, and wherein surface roughness profile of the inner circumference surface has Rz 0.5 to 1.0 ?m, Rk=0.2 to 0.4 ?m, Rpk=0.05 to 0.1 ?m, Rvk=0.08 to 0.2 ?m, meanwhile, wherein the composition of a piston ring includes carbon: 0.6 to 0.7% by weight, chrome: 13 to 14% by weight, molybdenum: 0.2 to 0.4% by weight, silicon: 0.25 to 0.50% by weight, manganese: 0.2 to 0.5% by weight, and the rest: unavoidable impurities and iron, and wherein carbides with the diameter of 5.Type: ApplicationFiled: August 30, 2007Publication date: March 6, 2008Applicant: NIPPON PISTON RING CO., LTD.Inventors: Iwao HIRAISHI, Katsuaki Ogawa, Hiromi Ishikawa, Tsugane Hirase, Kazuhiro Sameshima
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Patent number: 6698763Abstract: A piston ring having a stainless steel base material, the base material having an upper surface, a lower surface, an inner circumferential surface and an outer circumferential surface, the surfaces each having a nitride layer formed thereon, the nitride layer each first being formed to have a compound layer and a diffusion layer, the diffusion layer of the outer circumferential surface then being exposed by removing the compound layer of the outer circumferential surface, the exposed diffusion layer thereafter having an ion-plating deposition layer of hard ceramic formed thereon, the piston ring wherein the exposed diffusion layer is entirely removed on the upper and lower corners of the upper and lower surface and the outer circumferential surface by chamfering corner regions of the nitride layer located around the upper and lower corners before the ion-plating deposition layer is formed.Type: GrantFiled: February 6, 2002Date of Patent: March 2, 2004Assignee: Nippon Piston Ring Co., Ltd.Inventors: Katsuaki Ogawa, Minako Chinou