Patents by Inventor Youichi Matsumoto
Youichi Matsumoto 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).
-
Patent number: 10389194Abstract: A permanent magnet electrical rotating machine is provided which is capable of contributing to protected permanent magnets and increased cooling performance during operation. The permanent magnet electrical rotating machine includes: permanent magnets; rotor cores that have the permanent magnets mounted thereto and are laminated in a rotating axis direction; spacers that are placed between adjacent rotor cores; and permanent magnet protection members that are installed between the permanent magnets and the rotor cores and also placed to maintain radial continuity in space partitioned by the spacers between the rotor cores.Type: GrantFiled: December 3, 2014Date of Patent: August 20, 2019Assignee: Hitachi, Ltd.Inventors: Mamoru Kimura, Masahiro Hori, Youichi Matsumoto, Tetsuo Fujigaki, Motonobu Iiduka, Yoshihiro Yasui, Eiichirou Tokizaki, Masanori Matsumoto
-
Patent number: 9935512Abstract: In a permanent magnet rotating electrical machine including a stator, a rotor obtained by stacking a plurality of rotor cores arranged with magnet insertion holes in layers with gaps, and permanent magnets inserted to the magnet insertion holes, the magnet insertion holes are formed on both sides of the duct piece so as to depart from the duct piece disposed between the rotor cores as the magnet insertion holes extend from the side of the center of the rotor core to the outer circumference side, the magnet insertion holes are disposed so as to shift from the duct piece in the circumferential direction of the rotor, and inner circumference side voids having the length in the circumferential direction wider than the thickness in the circumferential direction of the permanent magnets are provided from the inner circumference side ends of the permanent magnets toward the duct piece.Type: GrantFiled: December 2, 2014Date of Patent: April 3, 2018Assignee: Hitachi, Ltd.Inventors: Mamoru Kimura, Masahiro Hori, Tetsuo Fujigaki, Youichi Matsumoto, Motonobu Iiduka
-
Publication number: 20170155292Abstract: A permanent magnet electrical rotating machine is provided which is capable of contributing to protected permanent magnets and increased cooling performance during operation. The permanent magnet electrical rotating machine includes: permanent magnets; rotor cores that have the permanent magnets mounted thereto and are laminated in a rotating axis direction; spacers that are placed between adjacent rotor cores; and permanent magnet protection members that are installed between the permanent magnets and the rotor cores and also placed to maintain radial continuity in space partitioned by the spacers between the rotor cores.Type: ApplicationFiled: December 3, 2014Publication date: June 1, 2017Inventors: Mamoru KIMURA, Masahiro HORI, Youichi MATSUMOTO, Tetsuo FUJIGAKI, Motonobu IIDUKA, Yoshihiro YASUI, Eiichirou TOKIZAKI, Masanori MATSUMOTO
-
Publication number: 20150194851Abstract: In a permanent magnet rotating electrical machine including a stator, a rotor obtained by stacking a plurality of rotor cores arranged with magnet insertion holes in layers with gaps, and permanent magnets inserted to the magnet insertion holes, the magnet insertion holes are formed on both sides of the duct piece so as to depart from the duct piece disposed between the rotor cores as the magnet insertion holes extend from the side of the center of the rotor core to the outer circumference side, the magnet insertion holes are disposed so as to shift from the duct piece in the circumferential direction of the rotor, and inner circumference side voids having the length in the circumferential direction wider than the thickness in the circumferential direction of the permanent magnets are provided from the inner circumference side ends of the permanent magnets toward the duct piece.Type: ApplicationFiled: December 2, 2014Publication date: July 9, 2015Inventors: Mamoru KIMURA, Masahiro HORI, Tetsuo FUJIGAKI, Youichi MATSUMOTO, Motonobu IIDUKA
-
Patent number: 8777489Abstract: A ball bearing includes an inner ring having a raceway surface, an outer ring having a raceway surface, a plurality of rolling elements rollably disposed between the raceway surface of the inner ring and the raceway surfaces of the outer ring, and a resin cage configured to retain the plurality of rolling elements between the inner ring and the outer ring. The cage is a crown type cage having an annular base portion and a plurality of pockets formed in an axial end face of the annular base portion, in which the pockets retain the rolling elements. An axial distance between an axial position of a center of gravity of the cage and a curvature center of a spherical or cylindrical inner surface of each of the pockets is 0.6 or more times a radius of curvature of the inner surface. A hybrid vehicle transmission has this ball bearing.Type: GrantFiled: August 5, 2013Date of Patent: July 15, 2014Assignee: NSK Ltd.Inventors: Takeshi Maejima, Takanori Tanaka, Kinji Yukawa, Youichi Matsumoto
-
Publication number: 20130322802Abstract: A ball bearing includes an inner ring having a raceway surface, an outer ring having a raceway surface, a plurality of rolling elements rollably disposed between the raceway surface of the inner ring and the raceway surfaces of the outer ring, and a resin cage configured to retain the plurality of rolling elements between the inner ring and the outer ring. The cage is a crown type cage having an annular base portion and a plurality of pockets formed in an axial end face of the annular base portion, in which the pockets retain the rolling elements. An axial distance between an axial position of a center of gravity of the cage and a curvature center of a spherical or cylindrical inner surface of each of the pockets is 0.6 or more times a radius of curvature of the inner surface. A hybrid vehicle transmission has this ball bearing.Type: ApplicationFiled: August 5, 2013Publication date: December 5, 2013Applicant: NSK LTD.Inventors: Takeshi MAEJIMA, Takanori TANAKA, Kinji YUKAWA, Youichi MATSUMOTO
-
Patent number: 8523450Abstract: A ball bearing includes an inner ring having a raceway surface, an outer ring having a raceway surface, a plurality of rolling elements rollably disposed between the raceway surface of the inner ring and the raceway surfaces of the outer ring, and a resin cage configured to retain the plurality of rolling elements between the inner ring and the outer ring. The cage is a crown type cage having an annular base portion and a plurality of pockets formed in an axial end face of the annular base portion, in which the pockets retain the rolling elements. An axial distance between an axial position of a center of gravity of the cage and a curvature center of a spherical or cylindrical inner surface of each of the pockets is 0.6 or more times a radius of curvature of the inner surface. A hybrid vehicle transmission has this ball bearing.Type: GrantFiled: December 10, 2009Date of Patent: September 3, 2013Assignee: NSK Ltd.Inventors: Takeshi Maejima, Takanori Tanaka, Kinji Yukawa, Youichi Matsumoto
-
Publication number: 20110142388Abstract: A ball bearing includes an inner ring having a raceway surface, an outer ring having a raceway surface, a plurality of rolling elements rollably disposed between the raceway surface of the inner ring and the raceway surfaces of the outer ring, and a resin cage configured to retain the plurality of rolling elements between the inner ring and the outer ring. The cage is a crown type cage having an annular base portion and a plurality of pockets formed in an axial end face of the annular base portion, in which the pockets retain the rolling elements. An axial distance between an axial position of a center of gravity of the cage and a curvature center of a spherical or cylindrical inner surface of each of the pockets is 0.6 or more times a radius of curvature of the inner surface. A hybrid vehicle transmission has this ball bearing.Type: ApplicationFiled: December 10, 2009Publication date: June 16, 2011Applicant: NSK LTD.Inventors: Takeshi Maejima, Takanori Tanaka, Kinji Yukawa, Youichi Matsumoto
-
Patent number: 7659409Abstract: The object of the present invention is to provide 3-hydroxy-3-(2-thienyl)propionamides useful as synthesis intermediates of pharmaceutical preparations and the like and a method for obtaining optically active 3-amino-1-(2-thienyl)-1-propanols using the same with high reaction yield, high optical yield and industrially low cost. According to the present invention, 3-amino-1-(2-thienyl)-1-propanols are obtained by carrying out asymmetric reduction of a ?-ketocarbonyl compound having thiophene ring in the presence of a catalyst constituted from a compound of a group VIII or IX metal in the periodic table (e.g., a ruthenium compound) and an asymmetric ligand represented by a specified optically active diamine derivative (e.g., a diphenylethylenediamine derivative), or using a cell, a treated product of said cell or the like of a microorganism, and as occasion demands, carrying out amidation of the ester group and then carrying out reduction of the amido group.Type: GrantFiled: September 20, 2004Date of Patent: February 9, 2010Assignee: Mitsubishi Chemical CorporationInventors: Jun Takehara, Jingping Qu, Kazuaki Kanno, Hiroshi Kawabata, Yasumasa Dekishima, Makoto Ueda, Kyoko Endo, Takeshi Murakami, Tomoko Sasaki, Hisatoshi Uehara, Youichi Matsumoto, Shihomi Suzuki
-
Patent number: 7305330Abstract: To predict a correction rated life at high accuracy. A life predicting device executes step S1, step S2, step S4 for inputting specification information including a basic dynamic rated load C and basic static rated load C0, step 5 for computing a dynamic equivalent load P based on the specification information. step S3 for setting a reliability factor a1, step S7 and step S8 for determining a contact ellipse area S, step S9 for inputting a foreign substance purchasing diameter ddebris (“debris” means “foreign substance”), step 10 for determining a standardized foreign substance diameter (ddebris/? S), step S11 for setting a life correction coefficient axyz based on the standardized foreign substance diameter, and step S6 and step S12 for calculating a correction rated life Lnm based on the reliability coefficient, the life correction coefficient, the basic dynamic rated load and the dynamic equivalent load and the like.Type: GrantFiled: October 24, 2002Date of Patent: December 4, 2007Assignee: NSK Ltd.Inventors: Seigou Urakami, Youichi Matsumoto, Yasuo Murakami
-
Patent number: 7137741Abstract: A rolling bearing intended for longer life by improving seizure resistance and wear resistance in the circumstance with slip contact or in the circumstance where lubricant tends to be exhausted, which is manufactured by applying carburization or carbonitridation to an Si-added material to disperse and precipitate carbides or carbonitrides containing Si or Si—X (X=one or more of Mn, Mo, and Cr) thereby improving the seizure resistance and the wear resistance by the self-lubrication effect thereof, the size of the carbides or carbonitrides being preferably 10 ?m or less for preventing flaking, and the area ratio for the carbides or carbonitrides being preferably 1.0–30% for obtaining sufficient self-lubrication effect.Type: GrantFiled: December 6, 2002Date of Patent: November 21, 2006Assignee: NSK Ltd.Inventors: Shinji Fujita, Youichi Matsumoto, Yasuo Murakami, Nobuaki Mitamura, Shigeru Okita
-
Publication number: 20060048576Abstract: A first object is to provide a method for evaluating large-sized inclusions in a bearing steel. The method enables quantitative evaluation of large-sized inclusions even if the steel has a high degree of cleanliness. Further, a second object is to provide an appropriate bearing steel evaluated by the method for evaluating large-sized inclusions. Further, a third object is to provide a rolling bearing capable of eliminating short life products and cracked products and providing longer lifetime for entire bearings. In order to achieve the first object, a round bar formed of a bearing steel to be evaluated and an ultrasonic probe are placed in an ultrasonic transmission medium, and the size and number of large-sized inclusions that are present in the flaw detection volume are measured to estimate the existence probability of large-sized inclusions in the bearing steel to be evaluated.Type: ApplicationFiled: January 17, 2003Publication date: March 9, 2006Inventors: Akihiro Kiuchi, Yutaka Ishii, Youichi Matsumoto, Masaru Kawabe, Hiroshi Narai, Naoko Yokoyama
-
Publication number: 20050207687Abstract: The centerline average roughness of the raceway surface of at least the fixed ring of bearing rings is controlled to be 0.025 to 0.075 ?mRa, thereby suppressing the rotation slip of the rolling elements so as to prevent flaking that is accompanied by a structural change. This enables prolongation of the life of bearings. At least the fixed ring of the bearing rings contains, as alloy ingredients at a ratio of from 0.50 to 1.20% by mass of carbon, from 0.10 to 1.50% by mass of silicon, from 0.1 to 2.0% by mass of manganese, from 3.0 to 6.0% by mass of chromium, 2.0% by mass or less of molybdenum, and 1.0% by mass or less of vanadium, whereby the necessary hardness is obtained and the structure is stabilized. This enables prolongation of the life of bearings.Type: ApplicationFiled: July 21, 2004Publication date: September 22, 2005Applicant: NSK Ltd.Inventors: Shinji Fujita, Yoshiaki Sakajiri, Susumu Tanaka, Youichi Matsumoto, Nobuaki Mitamura, Yasuo Murakami, Kenichi Iso
-
Patent number: 6900298Abstract: A process for efficiently producing a nucleic acid derivative by condensing a specific nitrogen-containing heterocyclic compound such as a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose using a less expensive and safe reagent. Namely, a process for producing a nucleic acid derivative by condensing a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose in the presence of an iron halide.Type: GrantFiled: February 11, 2003Date of Patent: May 31, 2005Assignee: Mitsubishi Chemical CorporationInventors: Yuki Takuma, Kyoko Endo, Takeshi Murakami, Tomoko Maeda, Tomoko Sasaki, Youichi Matsumoto
-
Publication number: 20050107621Abstract: The object of the present invention is to provide 3-hydroxy-3-(2-thienyl)propionamides useful as synthesis intermediates of pharmaceutical preparations and the like and a method for obtaining optically active 3-amino-1-(2-thienyl)-1-propanols using the same with high reaction yield, high optical yield and industrially low cost. According to the present invention, 3-amino-1-(2-thienyl)-1-propanols are obtained by carrying out asymmetric reduction of a ?-ketocarbonyl compound having thiophene ring in the presence of a catalyst constituted from a compound of a group VIII or IX metal in the periodic table (e.g., a ruthenium compound) and an asymmetric ligand represented by a specified optically active diamine derivative (e.g., a diphenylethylenediamine derivative), or using a cell, a treated product of said cell or the like of a microorganism, and as occasion demands, carrying out amidation of the ester group and then carrying out reduction of the amido group.Type: ApplicationFiled: September 20, 2004Publication date: May 19, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Jun Takehara, Jingping Qu, Kazuaki Kanno, Hiroshi Kawabata, Yasumasa Dekishima, Makoto Ueda, Kyoko Endo, Takeshi Murakami, Tomoko Sasaki, Hisatoshi Uehara, Youichi Matsumoto, Shihomi Suzuki
-
Publication number: 20040252924Abstract: An inner ring 1 and an outer ring 2 are assured by a non-destructive inspection that the maximum length of a non-metallic inclusion existing in an area between the raceway surface and a depth twice a depth Z0 where the maximum shearing stress exerts is 0.Type: ApplicationFiled: April 14, 2004Publication date: December 16, 2004Inventors: Akihiro Kiuchi, Youichi Matsumoto, Manabu Ohori
-
Publication number: 20040249619Abstract: To predict a correction rated life at high accuracy. A life predicting device executes step S1, step S2, step S4 for inputting specification information including a basic dynamic rated load C and basic static rated load C0, step 5 for computing a dynamic equivalent load P based on the specification information. step S3 for setting a reliability factor a1, step S7 and step S8 for determining a contact ellipse area S, step S9 for inputting a foreign substance purchasing diameter ddebris (“debris” means “foreign substance”), step 10 for determining a standardized foreign substance diameter (ddebris/{square root}{square root over ( )}S), step S11 for setting a life correction coefficient axyz based on the standardized foreign substance diameter, and step S6 and step S12 for calculating a correction rated life Lnm based on the reliability coefficient, the life correction coefficient, the basic dynamic rated load and the dynamic equivalent load and the like.Type: ApplicationFiled: April 21, 2004Publication date: December 9, 2004Inventors: Seigou Urakami, Youichi Matsumoto, Yasuo Murakami
-
Publication number: 20040030139Abstract: A process for producing a compound represented by the following formula (IV): 1Type: ApplicationFiled: July 30, 2003Publication date: February 12, 2004Inventors: Mari Hara, Yuki Takuma, Manabu Katsurada, Akemi Hosokawa, Youichi Matsumoto, Yuzo Kasuga, Naoyuki Watanabe
-
Publication number: 20030153745Abstract: A process for efficiently producing a nucleic acid derivative by condensing a specific nitrogen-containing heterocyclic compound such as a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose using a less expensive and safe reagent. Namely, a process for producing a nucleic acid derivative by condensing a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose in the presence of an iron halide.Type: ApplicationFiled: February 11, 2003Publication date: August 14, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Yuki Takuma, Kyoko Endo, Takeshi Murakami, Tomoko Maeda, Tomoko Sasaki, Youichi Matsumoto
-
Patent number: RE49737Abstract: A ball bearing includes an inner ring having a raceway surface, an outer ring having a raceway surface, a plurality of rolling elements rollably disposed between the raceway surface of the inner ring and the raceway surfaces of the outer ring, and a resin cage configured to retain the plurality of rolling elements between the inner ring and the outer ring. The cage is a crown type cage having an annular base portion and a plurality of pockets formed in an axial end face of the annular base portion, in which the pockets retain the rolling elements. An axial distance between an axial position of a center of gravity of the cage and a curvature center of a spherical or cylindrical inner surface of each of the pockets is 0.6 or more times a radius of curvature of the inner surface. A hybrid vehicle transmission has this ball bearing.Type: GrantFiled: October 4, 2019Date of Patent: November 28, 2023Assignee: NSK LTD.Inventors: Takeshi Maejima, Takanori Tanaka, Youichi Matsumoto