Patents Assigned to JTEKT
  • Patent number: 8308373
    Abstract: An outer tapered member (4) having a conical inner circumferential surface is placed and an inner tapered member (5) having a conical outer circumferential surface in contact with the conical inner circumferential surface is placed in a through hole (31) of a first ring (1). A screw member (6) is screwed a predetermined quantity into the through hole (31) to axially press an axial end face of the inner tapered member (5) toward a second ring (2) with a predetermined force and to press the outer surface of the outer tapered member (4) against the through hole (31) of the first ring (1) with a predetermined force. A weld part (7) in contact with a first ring (1) side end portion of a pin (3) and the first ring (1) is formed to prevent the pin (3) from coming out of the first ring (1) by the weld part (7).
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: November 13, 2012
    Assignee: JTEKT Corporation
    Inventors: Takeshi Miyachi, Junichi Kubo
  • Patent number: 8307968
    Abstract: This invention provides a one-way clutch capable of hindering the generation of a coating between each sprag and each of inner and outer rings thereby preventing sprags and inner and outer rings from being damaged due to the slip therebetween and thereby lengthening the life of the engagement between each sprag and each of the inner and outer rings. The difference in surface hardness between each sprag (4) and each of an inner ring (2) and an outer ring (3) is set to be larger than a hardness of Rockwell C-scale HRC0 and to be equal to or smaller than HRC15.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: November 13, 2012
    Assignee: JTEKT Corporation
    Inventor: Shinji Yamane
  • Patent number: 8308370
    Abstract: In a sealing device for a bearing, a sub-seal lip is configured such that a slide contact surface is formed like an annular band. As the rotation speed of the bearing increases, the width of the slide contact surface is reduced by a centrifugal force. Thus, sliding friction can effectively be minimized. The torque of the bearing can be prevented from increasing at high-speed rotation. Even when the centrifugal force increases somewhat, only reduction in the width of the slide contact surface is caused. Thus, a slide-contacted state can be maintained. Consequently, the problem of floating-up of the sub-seal lip from a slinger is difficult to occur.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: November 13, 2012
    Assignee: JTEKT Corporation
    Inventors: Yoshitaka Nakagawa, Youichi Numada, Hajime Tadumi, Tsuyoshi Okumura, Kunihiro Yamaguchi, Ikuo Ito
  • Patent number: 8307842
    Abstract: A fluid supply valve attachment device that includes: a fixing member formed with a recessed fitting section; and a fluid supply valve provided with a protruded insertion section that is inserted and fixed in the recessed fitting section. Clearance between a reference inner peripheral surface of the recessed fitting section and a reference outer peripheral surface of the protruded insertion section is set smaller than clearance between an internal thread of the recessed fitting section and an external thread of the protruded insertion section in a state that the protruded insertion section is inserted and fixed in the recessed fitting section.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: November 13, 2012
    Assignee: JTEKT Corporation
    Inventors: Tomoshi Nakata, Motoyasu Yamamori, Toshikatsu Kubo
  • Publication number: 20120279320
    Abstract: The invention relates to a magnetic flux collector for a torque detection device. The collector includes two coaxial magnetic cylinder heads (6, 7), having respectively interlocked teeth (17, 28), overmoulded by means of a plastic material. The two cylinder heads (6, 7) have, at the periphery thereof, notches (18, 19, 23) provided such as to engage with matching grooves (32, 33) which comprise a cylindrical cavity (31) of a mould (30) for overmoulding the cylinder heads with the plastic material. The two cylinder heads (6, 7) are therefore positioned in a very accurate manner relative to one another, before injecting the overmoulding plastic material. The invention can be used for the production of torque sensors used in the power-steering systems of automobiles.
    Type: Application
    Filed: November 2, 2010
    Publication date: November 8, 2012
    Applicant: JTEKT EUROPE
    Inventors: Elsa Coscoy, Laurent Rey
  • Publication number: 20120283031
    Abstract: A propeller shaft includes a first shaft having a yoke at one end, a second shaft slidably connected to the other end of the first shaft, and a surface treated member which is arranged at a connecting portion, at which the first shaft and the second shaft are connected to each other, and to which surface treatment for improving slidability of the second shaft with respect to the first shaft is applied. The surface treated member is formed by a substrate which is separate from the first shaft and the second shaft and to which the surface treatment has been applied. The surface treated member is arranged at the connecting portion, at which the first shaft and the second shaft are connected to each other, after the surface treatment is applied.
    Type: Application
    Filed: July 17, 2012
    Publication date: November 8, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Tomoki OGAWA, Satoshi ARAKI, Yukinobu NISHIYAMA, Yoshinori SATOU, Kazunori AOKI
  • Publication number: 20120283058
    Abstract: A rotation urging mechanism includes an outer member which includes an outer raceway surface on an inner periphery thereof and is rotatable about a first axis, an inner member which includes, on an outer periphery thereof, an inner raceway surface disposed on a radially inner side of the outer raceway surface and is rotatable about the first axis, and a ball disposed rollably between the outer raceway surface and the inner raceway surface. One of the outer and inner raceway surfaces is formed about a second axis which is inclined with respect to the first axis, and the other raceway surface is formed about a third axis which is inclined with respect to the second axis and is disposed so as to cross the one raceway surface. The ball is disposed at a portion of intersection between the outer and inner raceway surfaces.
    Type: Application
    Filed: July 17, 2012
    Publication date: November 8, 2012
    Applicant: JTEKT CORPORATION
    Inventor: Hideki FUJIWARA
  • Patent number: 8306647
    Abstract: In a flexible manufacturing system, a control apparatus for a transfer device stores in a memory section thereof correlation information for correlating workpieces (ante-machining workpieces) to be attached to pallets with blank materials contained in blank material baskets. When a selected one of the pallets is to be transferred to a pallet loading station, the control apparatus determines blank materials corresponding to the workpieces to be attached to the selected one of the pallets based on the correlation information and then, controls the transfer device to transfer a blank material basket containing the determined blank materials from a basket rack to a basket loading station located adjacent to the pallet loading station in connection with transferring the selected one of the pallets to the pallet loading station. Thus, when the selected one of the pallets is transferred to the pallet loading station, it becomes possible to reduce the time taken for the worker to search for the blank material basket.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: November 6, 2012
    Assignee: JTEKT Corporation
    Inventors: Kozo Niimi, Koji Kito, Kazuhiro Tsujimura
  • Patent number: 8303188
    Abstract: An outer ring is provided with a key groove radially extending from an inner diameter to an outer diameter on an end surface thereof. A key member includes an annular body, an inwardly projecting part which is provided on an inner periphery of the annular body and adapted to be inserted into the key groove of the outer ring, and an outwardly projecting part which is provided on an outer periphery of the annular body and adapted to be inserted into a key groove of an axle box.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: November 6, 2012
    Assignee: JTEKT Corporation
    Inventor: Katsunori Otsuka
  • Patent number: 8306702
    Abstract: A steering wheel return compensation component is calculated based on an integrated value obtained by integrating a basic control amount in such a manner that the basic control amount has a property to rotate a steering wheel with a specific steering angle by a greater amount to its neutral position as the absolute value of the steering angle becomes greater. Alternatively, a steering wheel return compensation component is calculated in such a manner that the steering wheel return compensation component has a property to rotate the steering wheel by a greater amount to the neutral position as the absolute value of an integrated value obtained by integrating the steering angle becomes greater.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: November 6, 2012
    Assignee: JTEKT Corporation
    Inventors: Hiroshi Suzuki, Terutaka Tamaizumi
  • Publication number: 20120274260
    Abstract: In a motor control unit, a current-carrying failure detection unit determines a first determination condition and a second determination condition. The current-carrying failure detection unit measures a duration of a state where the first determination condition is satisfied, and a duration of a state where the second determination condition is satisfied. When the first or second duration exceeds a predetermined reference period, the current-carrying failure detection unit determines that a current-carrying failure has occurred.
    Type: Application
    Filed: April 19, 2012
    Publication date: November 1, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Toshihiro TAKAHASHI, Satoru MIKAMO, Hiroshi KAWAMURA, Jun HASEGAWA, Akihiro TOMITA, Akira NAMBU
  • Publication number: 20120273059
    Abstract: A valve device includes a wire channel through which wires are routed from the inside of a gas tank to the outside of the gas tank, and a hermetic connector in which a sealing member is provided around wire pins that constitute part of the wires is provided in the wire channel. In addition, the wire channel has multiple (two) bent portions formed on the outer side of the hermetic connector. When pulling force acts on the wires from the outside, stress concentration portions are formed in the wires at these bent portions.
    Type: Application
    Filed: April 9, 2012
    Publication date: November 1, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Kazushi NUMAZAKI, Yoshinori IMOTO, Yutaka INADA, Hiroaki SUZUKI
  • Patent number: 8297849
    Abstract: An inner ring is formed with an oil hole extending through a part between an inner ring raceway surface and an inner peripheral face thereof, and configured to force out grease, which has been supplied to an area between the inner ring raceway surface and an outer ring raceway surface, to the inner peripheral face in accordance with rolling of cylindrical rollers. The inner peripheral face of the inner ring is formed with a plurality of V-shaped inclined grooves configured to guide the grease, which has been forced out to the inner peripheral face of the inner ring through the oil hole, to opposite end portions of the inner peripheral face in an axial direction of the inner ring.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: October 30, 2012
    Assignee: JTEKT Corporation
    Inventor: Takeharu Uranishi
  • Patent number: 8301342
    Abstract: In an electric power steering apparatus including a charge-discharge circuit 16 that selectively configures a first output mode in which only a main power supply including a battery 9 is used to supply an electric power to a motor 4 or a second output mode in which the main power supply and an auxiliary power supply 14 are used to supply the electric power to the motor 4, and a control circuit 6 that selects the output mode of the charge-discharge circuit 16 according to the electric power required for steering assist, the control circuit 6 selects the second output mode when the electric power required for steering assist in the first output mode becomes equal to or higher than an upward threshold value P1 or selects the first output mode when the electric power required for steering assist in the second output mode becomes equal to or lower than a downward threshold value P2 that is lower than the upward threshold value P1.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: October 30, 2012
    Assignee: JTEKT Corporation
    Inventor: Shigeki Nagase
  • Patent number: 8299743
    Abstract: A machine tool a tool includes a supporting member relatively movable to a workpiece along a predetermined axis, a servo motor configured to drive the tool supporting member to the workpiece along the predetermined axis, a sizing sensor configured to measure a profile of the workpiece and to output a size deviation of measured values from a target profile, and a position detector configured to detect at least one of a relative position of the tool supporting member to the workpiece and a rotational position angle of the servo motor. The a servo driver is configured to drive the servo motor, and has a first feedback control having an output based on the size deviation, and a second feedback control based on an output of the position detector. The servo drives the servo motor by combining the outputs of the first and second feedback controls.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: October 30, 2012
    Assignee: JTEKT Corporation
    Inventors: Satoshi Abeta, Toshihiro Yonezu
  • Patent number: 8301293
    Abstract: A machined shape determining step of determining a machined shape machined by a basic tooling or basic tooling template of each machining efficiency group from a material shape (S19), a tooling determining step of determining an optimal tooling comprising a combination of a tool, a holder and a tool projection length on the basis of information of the tools and the holders, stored in a tool holder information storage unit, the combination having a maximum machining efficiency and being able to form the material shape into a corresponding one of the machined shapes without interfering with the machined shape (S20), a process candidate determining step of determining an optimal process candidate using the optimal tooling of each machining efficiency group (S21), and a process determining step of determining an optimal process on the basis of the optimal process candidate of each machining efficiency group (S10), are executed.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: October 30, 2012
    Assignee: Jtekt Corporation
    Inventors: Toshiyuki Okita, Yoshimasa Kuwano, Kazunari Teramoto
  • Patent number: 8301353
    Abstract: A vehicle motion control device and method computes a size of a using friction circle in each of wheels by multiplying a size of an each wheel friction circle indicating a maximum generating force in each of the wheel tires by a previously computed each wheel using percentage, computes the each wheel tire generating force and the each wheel using percentage indicating a rate with respect to an upper limit value of a ?-using efficiency in each of the wheels, and controls a vehicle motion in such a manner that the computed each wheel tire generating force is obtained on the basis of the computed each wheel tire generating force, thereby minimizing an upper limit of the ?-using efficiency in each of the wheels.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: October 30, 2012
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, JTEKT Corporation
    Inventors: Eiichi Ono, Yoshikazu Hattori
  • Publication number: 20120266707
    Abstract: The invention relates to a push device (8) which includes a rotary pad (10) in which the inner periphery (11) is off-centre relative to the outer periphery (12) and applied to the rear (9) of the rack (3) which is thereby pushed towards the teeth of the steering pinion (5). A clearance compensation mechanism (17) includes a thrust member (19) pressed against a radial arm (18) of the pad (10) by a compression spring (20) inserted between said member and an element (23) secured to the support (13) of the pad (10). A mobile stop (21) rotatably mounted relative to the element (23) comprises toothings having staggered gear teeth cooperating with notches of the thrust member (19). The stop (21) is connected to the element (23) by means of a torsion spring (22). The notches successively cooperate with the staggered teeth.
    Type: Application
    Filed: October 20, 2010
    Publication date: October 25, 2012
    Applicant: JTEKT EUROPE
    Inventors: Patrice Brochot, Laurent Rey
  • Publication number: 20120267944
    Abstract: In a machining tool, multiple tooth forming portions for plastically forming spline teeth on an axial end face of a vehicle hub unit, the axial end face facing inward in the vehicle lateral direction, are formed in a circular pattern about the central axis of the machining tool. In the machining tool, a rounded-portion forming portion is formed to form a rounded portion between a tooth flank and a top land of each spline tooth, and the radius of the rounded-portion forming portion gradually changes in the radial direction about the central axis.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 25, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Takuya TODA, Takaaki ONIZUKA, Katsuyuki HARADA
  • Publication number: 20120270666
    Abstract: A sliding type tripod constant velocity joint includes an outer ring having three raceway grooves which are formed on an inner peripheral surface and which extend in a direction of a rotation axis of the outer ring, a tripod including a boss part connected to a shaft and three tripod shaft parts which are provided upright so as to extend outward in a radial direction of the boss part from an outer peripheral surface of the boss part and which are inserted into the raceway grooves, respectively, and an intermediate member which is provided on an outer periphery of a corresponding one of the tripod shaft parts so as to be oscillated relative to the corresponding one of the tripod shaft parts and which has power transmission surfaces on outer surfaces and opposing the side surfaces of a corresponding one of the raceway grooves.
    Type: Application
    Filed: June 14, 2012
    Publication date: October 25, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Yoshinari SAKAI, Tatsuya YOSHII, Koichiro MIZUNO