Patents by Inventor Masaaki Tani
Masaaki Tani 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: 10497500Abstract: A powder magnetic core having excellent specific resistance or strength. The powder magnetic core has soft magnetic particles, first coating layers that coat the surfaces of the soft magnetic particles and include aluminum nitride, and second coating layers that coat at least a part of the surfaces of the first coating layers and include a low-melting-point glass having a softening point lower than an annealing temperature for the soft magnetic particles. The first coating layers including aluminum nitride are excellent in the wettability to the low-melting-point glass which constitutes the second coating layers and suppress diffusion of constitutional elements between the soft magnetic particles and the low-melting-point glass of the second coating layers. The powder magnetic core can stably exhibit a higher specific resistance and higher strength than the prior art owing to such a synergistic action of the first coating layers and second coating layers.Type: GrantFiled: September 4, 2015Date of Patent: December 3, 2019Assignee: TOYOTA JIDOSHA KABUHIKI KAISHAInventors: Masashi Ohtsubo, Masaaki Tani, Takeshi Hattori, Jung hwan Hwang, Masashi Hara, Shin Tajima, Naoki Iwata, Shinjiro Saigusa, Kohei Ishii, Daisuke Okamoto, Toshimitsu Takahashi
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Patent number: 10385772Abstract: A forming method of a thermal insulation film includes a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; and a second step of coating a surface of the anode oxidation coating film with a sealant containing filler to seal at least part of the micro-pores and the nano-pores by the sealant so as to form the thermal insulation film.Type: GrantFiled: December 18, 2015Date of Patent: August 20, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Reona Takagishi, Naoki Nishikawa, Masaaki Tani, Toshio Horie, Fumio Shimizu, Hiroshi Hohjo, Yoshifumi Wakisaka, Masakazu Murase
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Publication number: 20190214172Abstract: A dust core includes soft magnetic particles, a first coating layer, a second coating layer, and a third coating layer. The first coating layer is made of aluminum oxide with which at least a part of surfaces of the soft magnetic particles are coated. The second coating layer is made of aluminum nitride with which at least a part of a surface of the first coating layer is coated. The third coating layer is made of low-melting-point glass with which at least a part of a surface of the second coating layer is coated. The low-melting-point glass has a softening point lower than an annealing temperature of the soft magnetic particles.Type: ApplicationFiled: March 18, 2019Publication date: July 11, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masashi OHTSUBO, Masaaki TANI, Takeshi HATTORI, Junghwan HWANG, Masashi HARA, Shin TAJIMA, Shinjiro SAIGUSA, Kohei ISHII, Daisuke OKAMOTO, Toshimitsu TAKAHASHI
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Patent number: 10024199Abstract: The present invention provides a variable valve mechanism of an internal combustion engine, which includes an input member, an output member, a slider and a variable device. The output member has internal space formed therein and has a first cutout and a second cutout which are formed at two positions separated from each other in the swing direction so as to extend from an outer periphery of the output member to the internal space, and the input member is mounted in the internal space so as to extend through both inner sides of the first and second cutouts, and is brought into contact with inner side surfaces of the cutouts from both sides in the thrust direction, whereby relative displacement of the input member together with the slider in the thrust direction with respect to the output member is restricted at two positions by the first and second cutouts.Type: GrantFiled: January 28, 2016Date of Patent: July 17, 2018Assignees: OTICS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Hiramatsu, Koki Yamaguchi, Masahide Sakurai, Motohiro Yuge, Masaaki Tani
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Patent number: 9941039Abstract: A soft magnetic member is formed such that, when a differential relative permeability in an applied magnetic field of 100 A/m is represented by a first differential relative permeability ??L, and when a differential relative permeability in an applied magnetic field of 40 kA/m is represented by a second differential relative permeability ??H, a ratio of the first differential relative permeability ??L to the second differential relative permeability ??H satisfies a relationship of ??L/??H?10, and a magnetic flux density in an applied magnetic field of 60 kA/m is 1.15 T or higher.Type: GrantFiled: June 12, 2015Date of Patent: April 10, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Okamoto, Kiyotaka Onodera, Shinjiro Saigusa, Kohei Ishii, Masashi Ohtsubo, Junghwan Hwang, Masaaki Tani, Takeshi Hattori
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Patent number: 9879577Abstract: A variable valve mechanism of an internal combustion engine includes a plurality of swing members and a variable device that displaces a control shaft to displace a plurality of slider gears of the swing members at a time, thereby changing valve lifts of the plurality of swing members at a time by meshing of helical splines. The swing members include a first swing member for a predetermined cylinder of a plurality of cylinders and a second swing member for a cylinder other than the predetermined cylinder, and a helix angle of the helical splines varies between the first and the second swing members. The variable device displaces the control shaft to a predetermined normal position to perform a normal operation, and displaces the control shaft to a predetermined cylinder cutoff position to perform a cylinder cutoff operation in which the second swing member does not drive a valve.Type: GrantFiled: March 24, 2016Date of Patent: January 30, 2018Assignees: OTICS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koki Yamaguchi, Naoki Hiramatsu, Takayuki Maezako, Masatoshi Sugiura, Shinichiro Kikuoka, Masaaki Tani, Motohiro Yuge
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Publication number: 20170263359Abstract: A powder magnetic core having excellent specific resistance or strength. The powder magnetic core has soft magnetic particles, first coating layers that coat the surfaces of the soft magnetic particles and include aluminum nitride, and second coating layers that coat at least a part of the surfaces of the first coating layers and include a low-melting-point glass having a softening point lower than an annealing temperature for the soft magnetic particles. The first coating layers including aluminum nitride are excellent in the wettability to the low-melting-point glass which constitutes the second coating layers and suppress diffusion of constitutional elements between the soft magnetic particles and the low-melting-point glass of the second coating layers. The powder magnetic core can stably exhibit a higher specific resistance and higher strength than the prior art owing to such a synergistic action of the first coating layers and second coating layers.Type: ApplicationFiled: September 4, 2015Publication date: September 14, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masashi OHTSUBO, Masaaki TANI, Takeshi HATTORI, Jung hwan HWANG, Masashi HARA, Shin TAJIMA, Naoki IWATA, Shinjiro SAIGUSA, Kohei ISHII, Daisuke OKAMOTO, Toshimitsu TAKAHASHI
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Patent number: 9702052Abstract: A forming method of a thermal insulation film, including: a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; a second step of abrading a surface of the anode oxidation coating film with abrasive powders and bringing the abrasive powders into the micro-pores located at the formed abraded surface; and a third step of forming a protection film on the abraded surface to produce a thermal insulation film including the anode oxidation coating film and the protection film.Type: GrantFiled: November 5, 2015Date of Patent: July 11, 2017Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Naoki Nishikawa, Masaaki Tani, Hiroshi Hohjo
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Publication number: 20160312669Abstract: A variable valve mechanism of an internal combustion engine includes a plurality of swing members and a variable device that displaces a control shaft to displace a plurality of slider gears of the swing members at a time, thereby changing valve lifts of the plurality of swing members at a time by meshing of helical splines. The swing members include a first swing member for a predetermined cylinder of a plurality of cylinders and a second swing member for a cylinder other than the predetermined cylinder, and a helix angle of the helical splines varies between the first and the second swing members. The variable device displaces the control shaft to a predetermined normal position to perform a normal operation, and displaces the control shaft to a predetermined cylinder cutoff position to perform a cylinder cutoff operation in which the second swing member does not drive a valve.Type: ApplicationFiled: March 24, 2016Publication date: October 27, 2016Inventors: Koki YAMAGUCHI, Naoki HIRAMATSU, Takayuki MAEZAKO, Masatoshi SUGIURA, Shinichiro KIKUOKA, Masaaki TANI, Motohiro YUGE
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Publication number: 20160281546Abstract: The present invention provides a variable valve mechanism of an internal combustion engine, which includes an input member, an output member, a slider and a variable device. The output member has internal space formed therein and has a first cutout and a second cutout which are formed at two positions separated from each other in the swing direction so as to extend from an outer periphery of the output member to the internal space, and the input member is mounted in the internal space so as to extend through both inner sides of the first and second cutouts, and is brought into contact with inner side surfaces of the cutouts from both sides in the thrust direction, whereby relative displacement of the input member together with the slider in the thrust direction with respect to the output member is restricted at two positions by the first and second cutouts.Type: ApplicationFiled: January 28, 2016Publication date: September 29, 2016Inventors: Naoki HIRAMATSU, Koki YAMAGUCHI, Masahide SAKURAI, Motohiro YUGE, Masaaki TANI
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Publication number: 20160273411Abstract: A camshaft includes a sensor rotor and a plurality of cams. The sensor rotor includes a base circle, and a projection portion formed on an outer peripheral surface of the base circle. A long diameter part of that one of the plurality of cams which is closest to the sensor rotor is placed within a region sandwiched between a first virtual line extending from the shaft center of the camshaft and a second virtual line extending from the shaft center of the camshaft in an axial view of the camshaft, the first virtual line passes through one circumferential end of the projection portion of the sensor rotor in an axial view of the camshaft, and the second virtual line passes through the other circumferential end of the projection portion of the sensor rotor in an axial view, of the camshaft.Type: ApplicationFiled: October 31, 2014Publication date: September 22, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaaki TANI, Michito SHIRAKAWA
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Publication number: 20160186654Abstract: A forming method of a thermal insulation film includes a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; and a second step of coating a surface of the anode oxidation coating film with a sealant containing filler to seal at least part of the micro-pores and the nano-pores by the sealant so as to form the thermal insulation film.Type: ApplicationFiled: December 18, 2015Publication date: June 30, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Reona TAKAGISHI, Naoki NISHIKAWA, Masaaki TANI, Toshio HORIE, Fumio SHIMIZU, Hiroshi HOHJO, Yoshifumi WAKISAKA, Masakazu MURASE
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Publication number: 20160130716Abstract: A forming method of a thermal insulation film, including: a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; a second step of abrading a surface of the anode oxidation coating film with abrasive powders and bringing the abrasive powders into the micro-pores located at the formed abraded surface; and a third step of forming a protection film on the abraded surface to produce a thermal insulation film including the anode oxidation coating film and the protection film.Type: ApplicationFiled: November 5, 2015Publication date: May 12, 2016Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki NISHIKAWA, Masaaki TANI, Hiroshi HOHJO
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Publication number: 20160071636Abstract: A dust core includes soft magnetic particles, a first coating layer, a second coating layer, and a third coating layer. The first coating layer is made of aluminum oxide with which at least a part of surfaces of the soft magnetic particles are coated. The second coating layer is made of aluminum nitride with which at least a part of a surface of the first coating layer is coated. The third coating layer is made of low-melting-point glass with which at least a part of a surface of the second coating layer is coated. The low-melting-point glass has a softening point lower than an annealing temperature of the soft magnetic particles.Type: ApplicationFiled: September 8, 2015Publication date: March 10, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masashi OHTSUBO, Masaaki Tani, Takeshi Hattori, Junghwan Hwang, Masashi Hara, Shin Tajima, Shinjiro Saigusa, Kohei Ishii, Daisuke Okamoto, Toshimitsu Takahashi
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Publication number: 20150364235Abstract: A soft magnetic member is formed such that, when a differential relative permeability in an applied magnetic field of 100 A/m is represented by a first differential relative permeability ??L, and when a differential relative permeability in an applied magnetic field of 40 kA/m is represented by a second differential relative permeability ??H, a ratio of the first differential relative permeability ??L to the second differential relative permeability ??H satisfies a relationship of ??L/??H?10, and a magnetic flux density in an applied magnetic field of 60 kA/m is 1.15 T or higher.Type: ApplicationFiled: June 12, 2015Publication date: December 17, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke OKAMOTO, Kiyotaka ONODERA, Shinjiro SAIGUSA, Kohei ISHII, Masashi OHTSUBO, Junghwan HWANG, Masaaki TANI, Takeshi HATTORI
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Patent number: 9181820Abstract: A valve mechanism for an internal combustion engine is provided with a cam that rotates in conjunction with rotation of a crankshaft, an engine valve that is lifted and opened along with rotation of the cam, a variable lift amount mechanism that is arranged between the cam and the engine valve and varies the maximum amount of lift of the engine valve, and a lost motion mechanism that is arranged between the cam and the engine valve and absorbs the amount of lift of the engine valve by contracting when drive force is received from the cam to maintain a closed state of the engine valve. The maximum amount of contraction of the lost motion mechanism is set to such a value that the lost motion mechanism absorbs the minimum value of the maximum lift amount of the engine valve.Type: GrantFiled: April 27, 2012Date of Patent: November 10, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaaki Tani, Fuminori Hosoda
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Publication number: 20150090206Abstract: A valve mechanism for an internal combustion engine is provided with a cam that rotates in conjunction with rotation of a crankshaft, an engine valve that is lifted and opened along with rotation of the cam, a variable lift amount mechanism that is arranged between the cam and the engine valve and varies the maximum amount of lift of the engine valve, and a lost motion mechanism that is arranged between the cam and the engine valve and absorbs the amount of lift of the engine valve by contracting when drive force is received from the cam to maintain a closed state of the engine valve. The maximum amount of contraction of the lost motion mechanism is set to such a value that the lost motion mechanism absorbs the minimum value of the maximum lift amount of the engine valve.Type: ApplicationFiled: April 27, 2012Publication date: April 2, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaaki Tani, Fuminori Hosoda
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Patent number: 8911866Abstract: A powder for a powder magnetic core, a powder magnetic core, and methods of producing those products are provided, so that mechanical strength of a powder magnetic core can be enhanced by hydrosilylation reaction between vinylsilane and hydrosilane without degrading magnetic properties. The powder for a powder magnetic core is composed of magnetic particles 2 having a surface 21 coated with an insulating layer 3, wherein the insulating layer 3 includes a polymer resin insulating layer 33 comprising vinylsilane 4 and hydrosilane.Type: GrantFiled: September 2, 2009Date of Patent: December 16, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Okamoto, Daisuke Ichigozaki, Shin Tajima, Masaaki Tani
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Patent number: 8716424Abstract: The present invention is characterized in that it is a process for synthesizing an organic/inorganic composite that not only comprises an oxide of silicon and metal, oxide which includes a bond being expressed by “M-O-M” (where “M” independently represents silicon atom or metal atom), but also possesses an organic group which is bonded to a part of silicone atoms at least; and it includes: a preparation step of preparing a raw-material solution by dissolving an organo alkoxysilane, which possesses one or more alkoxy groups and has the silicon atom that is bonded with the organic group by covalent bond, and a metallic compound, which includes the metal atom, in a first solvent, which is a polar solvent; a reaction step of synthesizing the organic/inorganic composite by not only hydrolyzing the organo alkoxysilane and the metallic compound but also condensing them by means of dehydration; and a removal step of adding a second solvent, which does not dissolve compatibly with a solution that has undergone the reaType: GrantFiled: January 28, 2009Date of Patent: May 6, 2014Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Masaaki Tani, Yoshiaki Fukushima
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Publication number: 20110156850Abstract: A powder for a powder magnetic core, a powder magnetic core, and methods of producing those products are provided, so that mechanical strength of a powder magnetic core can be enhanced by hydrosilylation reaction between vinylsilane and hydrosilane without degrading magnetic properties. The powder for a powder magnetic core is composed of magnetic particles 2 having a surface 21 coated with an insulating layer 3, wherein the insulating layer 3 includes a polymer resin insulating layer 33 comprising vinylsilane 4 and hydrosilane.Type: ApplicationFiled: September 2, 2009Publication date: June 30, 2011Inventors: Daisuke Okamoto, Daisuke Ichigozaki, Shine Tajima, Masaaki Tani