Patents by Inventor Katsura Koyagi
Katsura Koyagi 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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Publication number: 20070177834Abstract: A seal device with sensor (7) is configured by a fixed side seal member (8) fixed to a vehicle body side raceway member (3) and a rotating side seal member (9) fixed to a wheel side raceway member (4). The fixed side seal member (8) includes a core metal (21), a resin member (22) integrated with the core metal (21) through insert molding, a sensor (11) resin molded to the core metal (21), and an elastic seal (65) adhered to the core metal (21). The core metal (21) of the fixed side seal member (8) includes a fitting cylindrical part (61) fitted and fixed to the vehicle body side raceway member (3), a coupling part (62) extending towards the cylindrical part (31) of the rotating side seal member (9) and a moisture entering prevention cylindrical part (65) extending outward in the axial direction in continuation with the coupling part (62), and the outer end part in the axial direction of the fitting cylindrical part (61) is positioned in the resin (22).Type: ApplicationFiled: October 29, 2004Publication date: August 2, 2007Applicants: JTEKT Corporation, Aisin Seiki Kabushiki Kaisha, Uchiyama Manufacturing Corp.Inventors: Katsura Koyagi, Tetsuaki Numata, Masahiro Inoue, Syunichi Matsui, Yoshifumi Shige, Tooru Kuwajima, Masahiro Kimura, Eiichiro Iwase, Takeshi Kageyama
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Patent number: 7245123Abstract: A sensor-equipped hub unit comprises a hub unit 1 having a wheel-side raceway member 4, a body-side raceway member 5, and two rows of rolling bodies 6, and a sensor device 2 provided on the hub unit 1. The sensor device 2 has a magnetostrictive sensor 31 for detecting a reverse magnetostrictive effect of the raceway member 4 produced by a force exerted thereon by the rolling bodies 6. The sensor device 2 detects rotation from the number of repetitions of a variation in strain and also detects the force acting on the wheel-side raceway member 4 from the amplitude of strain.Type: GrantFiled: May 16, 2003Date of Patent: July 17, 2007Assignee: Jtekt CorporationInventors: Masahiro Inoue, Kenji Sakamoto, Katsura Koyagi
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Publication number: 20070157742Abstract: A hub unit with a sensor comprises a hub unit 1 including a body-side raceway member 3, a wheel-side raceway member 4 and two rows of rolling elements 5, and a sensor device 2. The sensor device 2 includes a magnetostrictive sensor 8 for detecting the inverse magnetostrictive effect, and the magnetostrictive sensor 8 is mounted to the body-side raceway member 3 so as to be capable of measuring the tensile strain in the uppermost part of an inner wheel 17 of the wheel-side raceway member 4. From the output of the magnetostrictive sensor 8, the tire grounding load and the rotational velocity are detected.Type: ApplicationFiled: August 30, 2004Publication date: July 12, 2007Applicant: JTEKT CorporationInventors: Kenichi Kouduki, Katsura Koyagi, Masahiro Inoue
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Publication number: 20070139035Abstract: A magnetized body (12) is constituted by a resin bonded magnet, and is fixed to a support member (11) in accordance with an integral injection molding, in such a manner that a come-off preventing portion (15) engaging with an outer peripheral portion of a flange portion (14) is formed in an outer periphery of the magnetized body (12). An elastic layer (17) is interposed between the magnetized body (12) and the flange portion (14) A side surface of the flange portion (14) is provided with a concave portion (16) having a depth corresponding to a thickness of the elastic layer (17).Type: ApplicationFiled: December 15, 2006Publication date: June 21, 2007Applicant: JTEKT CorporationInventors: Yasuhiko ISHII, Naoki Morimura, Katsura Koyagi, Tetsuaki Numata, Nobutsuna Motohashi
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Patent number: 7216551Abstract: A sensor device 2 has a magnetostrictive sensor 8 provided on a fixed-side raceway member 3 for detecting a gap between the sensor and a rotation-side raceway member 4, and means for processing the output of the magnetostrictive sensor 8. The processing means comprises a rotation detecting unit for determining the speed of rotation of the rotation-side raceway member 4 from the number of repetitions of a variation in the output of the magnetostrictive sensor 8, a unit for averaging output values of the magnetostrictive sensor 8 and a load calculating unit for determining the load acting on an antifriction bearing from the output averaged by the averaging unit.Type: GrantFiled: February 6, 2004Date of Patent: May 15, 2007Assignee: JTEKT CorporationInventors: Katsura Koyagi, Masahiro Inoue
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Publication number: 20070104402Abstract: A seal device with a sensor includes a fixed seal member fixed to a body-side raceway member and a rotated seal member fixed to a body-side raceway member. The rotated seal member comprises a pulsar provided with a support member and a magnetized body. The support member of the pulsar includes a small-diameter cylindrical portion fitted and fixed to a cylindrical portion of the rotated seal member, a large-diameter cylindrical portion having the magnetized body provided therein, and a connecting portion connecting both of the cylindrical portions. The support member of the pulsar is fitted and fixed to the axial inner portion of the cylindrical portion of the rotated seal member such that the connecting portion is set inward in the axial direction.Type: ApplicationFiled: October 31, 2006Publication date: May 10, 2007Applicants: JTEKT CORPORATION, UCHIYAMA MANUFACTURING CORP.Inventors: Katsura Koyagi, Tooru Kuwajima, Takeshi Kageyama
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Publication number: 20070076993Abstract: A sensor-equipped seal device comprises a fixed-side seal member 8 and a rotation-side seal member 9. The fixed-side seal member 8 comprises a metal core 21, a resin member 22 joined to the metal core 21 by insert molding, and a sensor 11 attached to the metal core 21 with the molded resin member. The rotation-side seal member 9 has a slinger 31 fixedly fitted to a wheel-side raceway member 4, and a pulser 10 secured to the slinger 31. The metal core 21 of the fixed-side seal member 8 has a cylindrical portion 41 fixedly fitted to a body-side raceway member 3, and a flange 42 extending from an axially inner end of the cylindrical portion 41 toward the rotation-side seal member 9 so that no metal portion exists between the sensor 11 and the purser 10.Type: ApplicationFiled: October 29, 2004Publication date: April 5, 2007Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, UCHIYAMA MANUFACTURING CORP.Inventor: Katsura Koyagi
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Patent number: 7197944Abstract: A sensor device including a resolver having a rotor provided on a rotation-side raceway member of a hub unit and a stator provided on a stationary-side raceway member of the unit, and a processing circuit for processing a signal to be output in accordance with an air gap between the stator and the rotor. The processing circuit has a wheel ground contact load calculating unit for determining the ground contact load on a wheel from the air gap between the stator and the rotor.Type: GrantFiled: December 26, 2003Date of Patent: April 3, 2007Assignee: Koyo Seiko Co., Ltd.Inventors: Katsura Koyagi, Masahiro Inoue
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Patent number: 7197387Abstract: Sensor-equipped hub units 34a attached to respective drive wheels 34 each have a sensor device comprising a sensor 36 for detecting the ground contact load on the wheel 34. A control unit 31 has a traction controller 32, whereby when the ground contact load value output from one of the ground contact load sensors 36 while the vehicle is traveling straight is outside a predetermined range, the drive wheel 34 is controlled so as to return the ground contact load value to the original value.Type: GrantFiled: July 2, 2003Date of Patent: March 27, 2007Assignee: Koyo Seiko Co., Ltd.Inventors: Masahiro Inoue, Katsura Koyagi, Kenji Sakamoto
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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: 20060186627Abstract: A sensor device 4 has a resolver comprising a stator 21 provided on a suspension member 1 and a rotor 31 provided on an axle member 2. The axle member 2 comprises a drive shaft 11 to be connected to a power transmission, and a hub shaft 12 having a wheel mount portion 13 and fixed to the drive shaft 11. The stator 21 is provided by a press fit on an axial end of knuckle 1a of the suspension member 1 toward a wheel, and the rotor 31 is provided by a press fit on the hub shaft 12 of the axle member 2. The stator 21 and the rotor 31 are opposed to each other radially thereof. An antifriction bearing 3 has rolling bodies 7 in left and right two rows, an outer ring 5 in the form of an integral ring having two raceways, and divided inner rings 6 each having a single raceway.Type: ApplicationFiled: March 10, 2003Publication date: August 24, 2006Inventors: Katsura Koyagi, Teruyuki Wakisaka, Masahiro Inoue
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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: 20060134344Abstract: After forming a primary powder bed at a toothed portion of an article, such as a gear or a spline shaft, by electrostatic powder coating process, the powder bed is removed from crests of teeth in the toothed portion by a specified thickness by scraping it off while sucking up the scraped powder. Next, the electrostatic powder coating process is performed again to form a secondary powder bed over the entire surface of the toothed portion. Then, the primary and secondary powder beds are melted or fused by induction heating to thereby form a coating film of a substantially uniform thickness.Type: ApplicationFiled: February 14, 2006Publication date: June 22, 2006Applicant: Koyo Seiko Co.,Inventors: Kouji Kitahata, Takeshi Tojo, Katsura Koyagi, Takanori Kurokawa, Atsuo Suehiro, Yoshifumi Niide, Kouichi Taniguchi, Shingo Nakamura
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Patent number: 7048972Abstract: After forming a primary powder bed (i.e., powder layer) at a toothed portion of an article, such as a gear or a spline shaft, by electrostatic powder coating process, the powder bed/layer is removed from crests of teeth in the toothed portion by a specified thickness by scraping it off while sucking up the scraped powder. Next, the electrostatic powder coating process is performed again to form a secondary powder bed/layer over the entire surface of the toothed portion. Then, the primary and secondary powder beds/layers are melted or fused by induction heating to thereby form a coating film of a substantially uniform thickness.Type: GrantFiled: June 17, 2004Date of Patent: May 23, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Kouji Kitahata, Takeshi Tojo, Katsura Koyagi, Takanori Kurokawa, Atsuo Suehiro, Yoshifumi Niide, Kouichi Taniguchi, Shingo Nakamura
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Publication number: 20060087315Abstract: An outer ring 3 is provided with the stator 7 of a resolver 2, and a ring member 4 with the rotor 8 of the resolver 2. The stator 7 comprises an annular core 9 and a winding 10 provided around the core 9. The ring member 4 is provided at a position opposed to the stator 7 with an eccentric cylindrical face serving as the rotor 8 and eccentric with respect to other outer peripheral surface of the ring member 4.Type: ApplicationFiled: December 19, 2003Publication date: April 27, 2006Inventors: Masahiro Inoue, Katsura Koyagi
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Publication number: 20060075833Abstract: A sensor device comprises a resolver 2 comprising a rotor provided on a rotation-side raceway member 4 of a hub unit 1 and a stator 7 provided on a stationary-side raceway member 3 of the unit 1, and a processing circuit for processing a signal to be output in accordance with an air gap between the stator 7 and the rotor 8. The processing circuit has a wheel ground contact load calculating unit for determining the ground contact load on a wheel from the air gap between the stator 7 and the rotor 8.Type: ApplicationFiled: December 26, 2003Publication date: April 13, 2006Applicant: KOYO SEIKO CO. LTD.Inventors: Katsura Koyagi, Masahiro Inoue
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Publication number: 20060061352Abstract: A sensor device 2 has a magnetostrictive sensor 8 provided on a fixed-side raceway member 3 for detecting a gap between the sensor and a rotation-side raceway member 4. and means for processing the output of the magnetostrictive sensor 8. The processing means comprises a rotation detecting unit for determining the speed of rotation of the rotation-side raceway member 4 from the number of repetitions of a variation in the output of the magnetostrictive sensor 8, a unit for averaging output values of the magnetostrictive sensor 8 and a load calculating unit for determining the load acting on an antifriction bearing from the output averaged by the averaging unit.Type: ApplicationFiled: February 6, 2004Publication date: March 23, 2006Applicant: KOYO SEIKO CO., LTD.Inventors: Katsura Koyagi, Masahiro Inoue
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Publication number: 20060054424Abstract: A brake caliper 12 is fastened to a fixed-side raceway member 3 of a hub unit 1 as an assembly. The fixed-side raceway member 3 has a caliper mount 10 extending radially outwardly thereof and having the brake caliper 12 attached thereto. A sensor device 2 has strain gauges 2a serving as a brake torque sensor and provided on the fixed-side raceway member 3. The strain gauges 2a are provided at the base end 10a of the caliper mount 10 of the fixed-side raceway member 3.Type: ApplicationFiled: January 16, 2004Publication date: March 16, 2006Applicant: KOYO SEIKO CO., LTD.Inventors: Masahiro Inoue, Katsura Koyagi
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Publication number: 20050268737Abstract: A ball screw device includes a screw shaft having a spiral screw groove on the inner peripheral surface and extending in the axial direction, a nut member having a plurality of screw grooves on the circumferential surface of less than one full turn corresponding to the above screw grooves, a plurality of ball circulation grooves respectively connecting the upstream side and the downstream side of each screw groove, and a number of balls interposed between the screw groove of the screw shaft and the screw grooves of the nut member. The plurality of ball circulation grooves are disposed so that they are shifted relative to each other in the circumferential direction.Type: ApplicationFiled: August 11, 2005Publication date: December 8, 2005Applicant: Koyo Seiko Co., Ltd.Inventors: Masahiro Inoue, Isao Usuki, Katsura Koyagi
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Publication number: 20050222740Abstract: Sensor-equipped hub units 34a attached to respective drive wheels 34 each have a sensor device comprising a sensor 36 for detecting the ground contact load on the wheel 34. A control unit 31 has a traction controller 32, whereby when the ground contact load value output from one of the ground contact load sensors 36 while the vehicle is traveling straight is outside a predetermined range, the drive wheel 34 is controlled so as to return the ground contact load value to the original value.Type: ApplicationFiled: July 2, 2003Publication date: October 6, 2005Inventors: Masahiro Inoue, Katsura Koyagi, Kenji Sakamoto