Patents by Inventor Minoru Sentoku
Minoru Sentoku 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: 8957675Abstract: Upon detecting a peak value from output signals of one of either a first or a second magnetic sensor, an rotation angle computation device identifies, on basis of an amplitude compensation table corresponding to the one magnetic sensor for which the peak value was detected, a pole number of a magnetic pole sensed by the magnetic sensor. Then, based on the identified pole number and a magnetic pole identification table, a pole number of a magnetic pole sensed by the other magnetic sensor is identified. The pole numbers of the magnetic poles sensed by the respective magnetic sensors are thus identified, and the rotation angle computation device compensates the output signals of the respective magnetic sensors using amplitude compensation gains corresponding to the sensed magnetic poles (magnetic pole pair).Type: GrantFiled: February 23, 2011Date of Patent: February 17, 2015Assignee: JTEKT CorporationInventors: Takeshi Ueda, Hayato Komatsu, Minoru Sentoku
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Patent number: 8689926Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).Type: GrantFiled: February 6, 2009Date of Patent: April 8, 2014Assignee: JTEKT CorporationInventors: Shigeki Nagase, Shiro Nakano, Ken Matsubara, Motoo Nakai, Kunihiro Oka, Naotake Kanda, Nobuhiro Uchida, Kouya Yoshida, Minoru Sentoku
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Patent number: 8408353Abstract: Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317).Type: GrantFiled: February 9, 2009Date of Patent: April 2, 2013Assignee: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Minoru Sentoku, Kunihiro Oka, Motoo Nakai, Kouya Yoshida, Nobuhiro Uchida, Naotake Kanda
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Publication number: 20120319680Abstract: Upon detecting a peak value from output signals of one of either a first or a second magnetic sensor, an rotation angle computation device identifies, on basis of an amplitude compensation table corresponding to the one magnetic sensor for which the peak value was detected, a pole number of a magnetic pole sensed by the magnetic sensor. Then, based on the identified pole number and a magnetic pole identification table, a pole number of a magnetic pole sensed by the other magnetic sensor is identified. The pole numbers of the magnetic poles sensed by the respective magnetic sensors are thus identified, and the rotation angle computation device compensates the output signals of the respective magnetic sensors using amplitude compensation gains corresponding to the sensed magnetic poles (magnetic pole pair).Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Applicant: JTEKT CORPORATIONInventors: Takeshi Ueda, Hayato Komatsu, Minoru Sentoku
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Publication number: 20110000737Abstract: Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317).Type: ApplicationFiled: February 9, 2009Publication date: January 6, 2011Applicant: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Minoru Sentoku, Kunihiro Oka, Motoo Nakai, Kouya Yoshida, Nobuhiro Uchida, Naotake Kanda
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Publication number: 20100314192Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).Type: ApplicationFiled: February 6, 2009Publication date: December 16, 2010Applicant: JTEKT CorporationInventors: Shigeki Nagase, Shiro Nakano, Ken Matsubara, Motoo Nakai, Kunihiro Oka, Naotake Kanda, Nobuhiro Uchida, Kouya Yoshida, Minoru Sentoku
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Patent number: 7497131Abstract: A roller bearing apparatus having a fixed bearing ring, a rotary bearing ring, and rolling elements rollably provided between the bearing rings. Piezoelectric elements are provided in the form of a film interposed between the fixed bearing ring and a fixing part to which the fixed bearing ring is fixed so as to detect loads applied between the fixed bearing ring and the fixing part.Type: GrantFiled: November 21, 2005Date of Patent: March 3, 2009Assignee: Jtekt CorporationInventor: Minoru Sentoku
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Publication number: 20080309322Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: ApplicationFiled: August 27, 2007Publication date: December 18, 2008Applicant: KOYO SEIKO CO., LTD.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Patent number: 7336067Abstract: Balls are interposed between respective raceway surfaces of inner and outer ring members, and a seal apparatus is provided between shoulder portions of the inner and outer ring members. The seal apparatus comprises an outer ring-side seal ring fixed to the outer ring member, and an inner ring-side seal ring fixed to the inner ring member. A pulser ring is fixed to a ring-shaped core metal of the inner ring-side seal ring. In an outer diameter side of the ring-shaped core metal of the outer ring-side seal ring, a magnetic sensor is molded with resin by an external member to be integrated therein. A connector connected to the magnetic sensor is formed consecutive with the external member.Type: GrantFiled: February 3, 2004Date of Patent: February 26, 2008Assignee: JTEKT CorporationInventors: Masahiro Inoue, Shunichi Matsui, Yoshifumi Shige, Minoru Sentoku, Katsura Koyagi
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Patent number: 7270016Abstract: A sensor includes a stator having four or more magnetic pole teeth and concentric with a stationary-side raceway member, and excitation coils and detection coils wound around the respective magnetic pole teeth. Signals generated in the detection coils according to distances between the magnetic pole teeth and a rotation-side raceway member are taken out for the respective magnetic pole teeth. The load acting on a rolling bearing is obtained in processing means from these signals.Type: GrantFiled: December 20, 2005Date of Patent: September 18, 2007Assignee: JTEKT CorporationInventors: Minoru Sentoku, Shirou Nakano
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Patent number: 7215110Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: GrantFiled: June 10, 2005Date of Patent: May 8, 2007Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20060228063Abstract: A sensor apparatus (2) includes an acceleration sensor (11) provided in a vehicle body side raceway member (3) and detecting a lateral G, and a processing means (31) for computing a load by using an output of the acceleration sensor (11). The processing means (31) determines a lateral load Fy, a vertical load Fz, and a moment Mx caused by the lateral load on the basis of an output G of the acceleration sensor (11) in accordance with the following expression: Fy=Mx÷a, Fz=b×G+c, and Mx=d×G2+e×G+f, where a, b, c, d, e, and f respectively denote constants unique to a load detection target that is provided with the sensor apparatus.Type: ApplicationFiled: April 7, 2006Publication date: October 12, 2006Applicant: JTEKT CorporationInventors: Minoru Sentoku, Takeo Iino
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Publication number: 20060228060Abstract: Balls are interposed between respective raceway surfaces of inner and outer ring members, and a seal apparatus is provided between shoulder portions of the inner and outer ring members. The seal apparatus comprises an outer ring-side seal ring fixed to the outer ring member, and an inner ring-side seal ring fixed to the inner ring member. A pulser ring is fixed to a ring-shaped core metal of the inner ring-side seal ring. In an outer diameter side of the ring-shaped core metal of the outer ring-side seal ring, a magnetic sensor is molded with resin by an external member to be integrated therein. A connector connected to the magnetic sensor is formed consecutive with the external member.Type: ApplicationFiled: February 3, 2004Publication date: October 12, 2006Inventors: Masahiro Inoue, Shunichi Matsui, Yoshifumi Shige, Minoru Sentoku, Katsura Koyagi
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Publication number: 20060153481Abstract: A seal apparatus comprises an outer ring side seal ring fixed to an outer ring member, and an inner ring side seal ring fixed to an inner ring member. A pulser ring is fixed to a ring shaped core metal of the inner ring side seal ring. On an outer diameter side of the ring shaped core metal of the outer ring side seal ring, a magnetic sensor is molded with resin by an external member to be integrated therewith. A connector connected to the magnetic sensor is successively formed with the external member. A reinforcing member which reinforces the sensor side connector is provided on at least either of the external member or the sensor side connector.Type: ApplicationFiled: February 12, 2004Publication date: July 13, 2006Applicant: Koyo Seiko Co., Ltd.Inventors: Minoru Sentoku, Shunichi Matsui, Masahiro Inoue, Yoshifumi Shige, Katsura Koyagi
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Publication number: 20060137471Abstract: A sensor (47) includes a stator (48) having four or more magnetic pole teeth (48b) and concentric with a stationary-side raceway member (43), and excitation coils (49) and detection coils (50) wound around the respective magnetic pole teeth (48b). Signals generated in the detection coils (50) according to distances between the magnetic pole teeth (48b) and a rotation-side raceway member (44) are taken out for the respective magnetic pole teeth (48b). The load acting on a rolling bearing (41) is obtained in processing means from these signals.Type: ApplicationFiled: December 20, 2005Publication date: June 29, 2006Applicant: KOYO SEIKO CO., LTD.Inventors: Minoru Sentoku, Shirou Nakano
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Publication number: 20060119349Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: ApplicationFiled: January 25, 2006Publication date: June 8, 2006Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Publication number: 20060107765Abstract: A roller bearing apparatus having a fixed bearing ring, a rotary bearing ring, and rolling elements rollably provided between the bearing rings. Piezoelectric elements are provided in the form of a film interposed between the fixed bearing ring and a fixing part to which the fixed bearing ring is fixed so as to detect loads applied between the fixed bearing ring and the fixing part.Type: ApplicationFiled: November 21, 2005Publication date: May 25, 2006Applicant: Koyo Seiko Co., Ltd.Inventor: Minoru Sentoku
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Patent number: 7034521Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: GrantFiled: July 2, 2002Date of Patent: April 25, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Patent number: 7019515Abstract: A pulsar ring is provided with a ring-shaped supporting member and a magnetized member formed into a strip shape and secured to a circumferential face of the supporting member so that N-poles and S-poles are arranged alternately with equal pitches. The length of the circumferential face of the supporting member is set so as to correspond to the length of the magnetized member so that the end portions of the magnetized member are butted to each other without any gap with the magnetic property in the butted portion being maintained to have equal pitches. The magnetized member is magnetized by a magnetizing device, and then affixed to the supporting member.Type: GrantFiled: September 10, 2002Date of Patent: March 28, 2006Assignee: Koyo Seiko Co., Ltd.Inventor: Minoru Sentoku
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Publication number: 20050242514Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: ApplicationFiled: June 10, 2005Publication date: November 3, 2005Applicants: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi