Patents by Inventor Michiru Ueda
Michiru Ueda 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: 8951945Abstract: There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.Type: GrantFiled: April 12, 2012Date of Patent: February 10, 2015Assignees: JTEKT Corporation, Nippon Grease Co., Ltd.Inventors: Koji Yoshizaki, Kunihiro Yamaguchi, Komatsugu Nishimura, Michiru Ueda, Hiroki Iwamatsu, Masashi Mitsuoka
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Publication number: 20120269472Abstract: There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.Type: ApplicationFiled: April 12, 2012Publication date: October 25, 2012Applicants: NIPPON GREASE CO., LTD., JTEKT CORPORATIONInventors: Koji YOSHIZAKI, Kunihiro Yamaguchi, Komatsugu Nishimura, Michiru Ueda, Hiroki Iwamatsu, Masashi Mitsuoka
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Publication number: 20080264528Abstract: A rolling, sliding part is made from a bearing steel, and the rolling, sliding surface thereof has a surface layer portion which is 56 to 64 in Rockwell C hardness, up to 12 vol. % in retained austenite content and 4 to 6 degrees in the X-ray half value width of martensite. Even if made from a common bearing steel, the rolling, sliding part is reduced in the likelihood of developing a WEA or like fatigue structure, consequently exhibiting a prolonged rolling, sliding life for use under severe conditions involving a high temperature, high speed, high load or high vibration.Type: ApplicationFiled: June 18, 2008Publication date: October 30, 2008Applicant: JTEKT CORPORATIONInventors: Hisashi HARADA, Hajime Tazumi, Michiru Ueda, Yukitoshi Murakami
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Patent number: 7281855Abstract: A tapered roller bearing includes: an outer race including an outer raceway surface; an inner race including an inner raceway surface and a larger collar surface which is a concave curved surface; and tapered rollers provided between the outer and inner races, each of the tapered rollers including a tapered surface and a larger end surface which is a convex curved surface communicating with the tapered surface and corresponds to the larger collar surface.Type: GrantFiled: April 23, 2004Date of Patent: October 16, 2007Assignee: Koyo Seiko Co., Ltd.Inventors: Hiroshi Ueno, Kazutoshi Toda, Hirofumi Dodoro, Shigeo Kamamoto, Hiroki Matsuyama, Liming Lou, Michiru Ueda, Kiyoshi Ogino, Tomohiro Haruta, Shinya Matsuda, Naoto Araki, Koshiro Yamakawa, Kazuhisa Kajihara, Yoshio Tateishi
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Patent number: 7201685Abstract: The present invention comprises a pulley, a shaft body which is rotatable relative to the pulley and is concentrically disposed radially inside of the pulley, a one-way clutch which is interposed at an annular space between the pulley and the shaft body, a rolling bearing which is disposed in the annular space adjacent to the one-way clutch in an axial direction, an inner annular seal which is provided outside the rolling bearing in the annular space, and an outer annular seal which is provided outside the inner annular seal and has a proximal end portion and a distal end side lip. The proximal end portion of the outer annular seal is fixed to one of an inner peripheral surface of the pulley and an outer peripheral surface of the shaft body, and the distal end side lip of the outer annular seal contacts the other peripheral surface.Type: GrantFiled: July 9, 2002Date of Patent: April 10, 2007Assignee: Koyo Seiko Co., Ltd.Inventors: Tadahiro Terada, Michiru Ueda, Yoshitaka Nakagawa, Hideki Fujiwara, Takahiro Ichihara
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Patent number: 7056247Abstract: A pulley unit includes a pulley and a rotor concentrically disposed for relative rotation, a one-way clutch interposed in an annular space therebetween, rolling bearings provided on opposite sides of the one-way clutch, and a seal ring for sealing the annular space. An inner diametrical surface of the pulley forms an outer ring raceway of the one-way clutch and the rolling bearing, and an outer diametrical surface of the shaft body forms an inner ring raceway of the one-way clutch and the rolling bearing. An outer diameter side of an annular portion of a retainer of the rolling bearing on the side of the seal ring is reduced so as to increase a storage volume of lubricating oil between the rolling bearing and the seal ring.Type: GrantFiled: July 27, 2001Date of Patent: June 6, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Hideki Fujiwara, Takahiro Ichihara, Tadahiro Terada, Michiru Ueda
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Publication number: 20050069238Abstract: A tapered roller bearing includes: an outer race including an outer raceway surface; an inner race including an inner raceway surface and a larger collar surface which is a concave curved surface; and tapered rollers provided between the outer and inner races, each of the tapered rollers including a tapered surface and a larger end surface which is a convex curved surface communicating with the tapered surface and corresponds to the larger collar surface.Type: ApplicationFiled: April 23, 2004Publication date: March 31, 2005Applicant: Koyo Seiko Co., Ltd.Inventors: Hiroshi Ueno, Kazutoshi Toda, Hirofumi Dodoro, Shigeo Kamamoto, Hiroki Matsuyama, Liming Lou, Michiru Ueda, Kiyoshi Ogino, Tomohiro Haruta, Shinya Matsuda, Naoto Araki, Koshiro Yamakawa, Kazuhisa Kajihara, Yoshio Tateishi
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Patent number: 6866476Abstract: An antifriction bearing unit comprises a rotating shaft, an outer ring, and rolling members. The rotating shaft comprises a large-diameter shaft portion serving as an inner ring and a small-diameter shaft portion, which is hollow and has a fitting portion of increased diameter at one end thereof. The large-diameter shaft portion has an end portion fitted and fixed in the fitting portion of the small-diameter shaft portion. The fitting portion has an outward flange integral with an end thereof. The outer ring is fixedly provided with a seal member having lips slidable in contact with the flange and the outer peripheral surface of the large-diameter shaft portion, respectively.Type: GrantFiled: May 29, 2002Date of Patent: March 15, 2005Assignee: Koyo Seiko Co., LtdInventors: Yoshizumi Sakata, Michiru Ueda
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Publication number: 20040234180Abstract: A rolling, sliding part is made from a bearing steel, and the rolling, sliding surface thereof has a surface layer portion which is 56 to 64 in Rockwell C hardness, up to 12 vol. % in retained austenite content and 4 to 6 degrees in the X-ray half value width of martensite. Even if made from a common bearing steel, the rolling, sliding part is reduced in the likelihood of developing a WEA or like fatigue structure, consequently exhibiting a prolonged rolling, sliding life for use under severe conditions involving a high temperature, high speed, high load or high vibration.Type: ApplicationFiled: February 27, 2004Publication date: November 25, 2004Applicant: KOYO SEIKO CO., LTD.Inventors: Hisashi Harada, Hajime Tazumi, Michiru Ueda, Yukitoshi Murakami
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Publication number: 20030006113Abstract: The present invention comprises a pulley, a shaft body which is rotatable relative to the pulley and is concentrically disposed radially inside of the pulley, a one-way clutch which is interposed at an annular space between the pulley and the shaft body, a rolling bearing which is disposed in the annular space adjacent to the one-way clutch in an axial direction, an inner annular seal which is provided outside the rolling bearing in the annular space, and an outer annular seal which is provided outside the inner annular seal and has a proximal end portion and a distal end side lip. The proximal end portion of the outer annular seal is fixed to one of an inner peripheral surface of the pulley and an outer peripheral surface of the shaft body, and the distal end side lip of the outer annular seal contacts the other peripheral surface.Type: ApplicationFiled: July 9, 2002Publication date: January 9, 2003Inventors: Tadahiro Terada, Michiru Ueda, Yoshitaka Nakagawa, Hideki Fujiwara, Takahiro Ichihara
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Publication number: 20020182066Abstract: An antifriction bearing unit comprises a rotating shaft, an outer ring, and rolling members. The rotating shaft comprises a large-diameter shaft portion serving as an inner ring and a small-diameter shaft portion, which is hollow and has a fitting portion of increased diameter at one end thereof. The large-diameter shaft portion has an end portion fitted and fixed in the fitting portion of the small-diameter shaft portion. The fitting portion has an outward flange integral with an end thereof. The outer ring is fixedly provided with a seal member having lips slidable in contact with the flange and the outer peripheral surface of the large-diameter shaft portion, respectively.Type: ApplicationFiled: May 29, 2002Publication date: December 5, 2002Inventors: Yoshizumi Sakata, Michiru Ueda
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Publication number: 20020134974Abstract: A pulley unit includes a pulley and a rotor concentrically disposed for relative rotation, a one-way clutch interposed in an annular space therebetween, rolling bearings provided on opposite sides of the one-way clutch, and a seal ring for sealing the annular space. An inner diametrical surface of the pulley forms an outer ring raceway of the one-way clutch and the rolling bearing, and an outer diametrical surface of the shaft body forms an inner ring raceway of the one-way clutch and the rolling bearing. An outer diameter side of an annular portion of a retainer of the rolling bearing on the side of the seal ring is reduced so as to increase a storage volume of lubricating oil between the rolling bearing and the seal ring.Type: ApplicationFiled: March 25, 2002Publication date: September 26, 2002Inventors: Hideki Fujiwara, Takahiro Ichihara, Tadahiro Terada, Michiru Ueda