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Koyo Seiko Co., Ltd. Patents
Assignee:
Koyo Seiko Co., Ltd.
Address:
Osaka, JP
No. of patents:
723
Patents:


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Patent Number Title Of Patent Date Issued
RE38936 Antifriction bearing and alternator incorporating same for use in vehicles January 17, 2006
An antifriction bearing includes a fixed ring which comprises a steel containing up to about 10% of residual austenite. An alternator for vehicles includes a stator mounted on a frame, a rotor having its rotary shaft rotatably supported by a pair of bearings on the frame and a drive
RE37967 Antifriction bearing and alternator incorporating same for use in vehicles January 21, 2003
An antifriction bearing includes a fixed ring which comprises a steel containing up to about 10% of residual austenite. An alternator for vehicles includes a stator mounted on a frame, a rotor having its rotary shaft rotatably supported by a pair of bearings on the frame and a drive
RE36804 Bearing sealing device and bearing sealing mechanism capable of preventing the leakage of grease August 1, 2000
There is provided a bearing sealing device capable of substantially completely preventing a leak of grease. A taper end portion of an axial extension of the bearing sealing device has an opposite surface and a rake face that forms a specified rake angle with the opposite surface. The
D372254 Pivot bearing July 30, 1996
D362256 Bearing September 12, 1995
7612556 Rolling bearing November 3, 2009
The rolling bearing apparatus of the present invention comprises a rolling element, a non-rolling element disposed concentrically with the rolling element, and a rotation detector for outputting an input exciting voltage by converting it to an induced voltage according to the relative ro
7540569 Wheel-use bearing apparatus June 2, 2009
A flange face portion located radially outwardly of boltholes of a flange is formed as a tilting face so that a maximum oppositely-spaced distance .alpha. of the flange face portion from a disc rotor is preferably 10 .mu.m. Thereby, minimization is implemented for convex deformation of a
7524238 Method of processing antifriction bearing unit for wheel April 28, 2009
A method of processing an antifriction bearing unit for a wheel, the antifriction bearing unit including an outer race, an inner race, a plurality of rolling elements and a flange portion for directly or indirectly mounting a brake disk provided to one of the outer and inner races, t
7512468 Electric power steering apparatus March 31, 2009
In an electric power steering apparatus which comprises a motor for generating steering assist force, it is judged whether or not the vehicle is in a state of straight forward motion. A mean reference steering angle is determined by dividing total of relative steering angles which are
7508148 Vehicle steering apparatus March 24, 2009
A current sensor 8a detects a motor current of a steering motor 5 which supplies a steering mechanism 1 with steering force corresponding to the steering amount applied to a steering wheel 2. A main controller 4 extracts component within a predetermined frequency range out of a motor
7488270 Toroidal continuously variable transmission and method for producing torque transmitting member February 10, 2009
In a toroidal continuously variable transmission, rolling contact portions of an input disc 4, an output disc 7, and roller 13 are formed of bearing steel, which contains C: 0.8-1.5 wt %; Si: 0.5-2.5 wt %; Mn: 0.3-2.0 wt %; Cr: 1.9-2.5 wt %; Mo: 0.3-1.0 wt %; and a total of 1.0 wt % or m
7484890 Rolling slide member February 3, 2009
There is provided a rolling slide member coming in contact with a mating member in a rolling or sliding manner, wherein a plurality of grooves having an inclination of 0 to 30 degree and a groove depth of 0.5 to 15 .mu.m are formed in a circumferential direction at the time of grinding a
7484760 Column hole cover February 3, 2009
A column hole cover is interposed between a circumferential portion of an aperture of a column hole of an instrument panel and a steering gear box capable of being displaced in a predetermined direction. The column hole cover includes a cylindrical main body extended in the predetermined
7438740 Briquette for raw material for iron manufacture and briquette for introduction into slag generat October 21, 2008
With the object of effective utilization of a fine powder generated during comminution of a crude material for iron manufacture, a briquette is provided which comprises a porous brittle molded body with a bulk specific gravity of 1.5 or more which is obtained by compression molding a
7431511 Rolling bearing October 7, 2008
A rolling bearing includes: outer and inner rings, at lease one of which is made of a ceramics; a plurality of rolling elements interposed between the outer and inner rings; a seal groove, a sectional shape in an axial direction of which is formed by substantially a partial circular arc,
7402006 Manufacturing method of gear device July 22, 2008
This method includes: a supporting process of supporting a worm wheel in a first supporting section of a supporting body; an engaging process of engaging a jig gear which corresponds to a worm with the worm wheel; a measuring process of measuring a distance between the centers of the wor
7387034 Torque detecting apparatus June 17, 2008
A torque detecting apparatus having a permanent magnet fixed to an input shaft, magnetic yokes fixed to an output shaft coaxially connected to the input shaft via a torsion bar and disposed within a magnetic field of the permanent magnet to form a magnetic circuit, and a Hall IC for dete
7374013 Electric power steering apparatus May 20, 2008
An electric power steering apparatus comprises a steering assisting electric motor having an output shaft and a speed reduction mechanism. The speed reduction mechanism includes conical first and second gears to be engaged with each other. The first and second gears include a plurali
7363134 Power steering apparatus April 22, 2008
A power steering apparatus according to the present invention is constructed to calculate a rate of change of steering speed detected by steering speed detecting means and judge whether the calculated rate of change is smaller than or equal to 0 or not, and reduce a gain of feedback
7353727 Vehicular steering apparatus April 8, 2008
A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft
7328631 Vehicular steering apparatus February 12, 2008
A vehicular steering apparatus includes a column bracket secured to a steering column; and a fixing bracket secured to a vehicle body. The column bracket includes a top plate and a pair of side plates. The fixing bracket supports the column bracket via a support shaft. A support-shaft
7322256 Ball screw mechanism for electric power steering apparatus January 29, 2008
A first ball circulating hole and a second ball circulating hole for connecting a circulator are bored midway at a screw groove formed on an inner circumference of a ball nut, an intermediate groove path between the first and second ball circulating holes becomes the range of a ball
7311334 Shock absorbing type steering device for vehicles and method of producing the same December 25, 2007
A shock absorbing type steering device decreases variations in press fitting loads corresponding to a friction force between two columns. A shock can be appropriately absorbed by relative movements of the two columns in an axial direction. At least one of a first column and a second
7308833 Torque sensor, wire harness, electric power steering assembly and terminal holder December 18, 2007
In a torque sensor having lead pins connected to a wire harness, the wire harness includes: a plurality of lead wires; a plurality of connection terminals each having a sleeve mounted around each of the lead pins and a connection portion extended from an outer periphery of the sleeve to
7281855 Tapered roller bearing and final reduction gear October 16, 2007
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 rol
7281604 Electric power steering apparatus October 16, 2007
An electric power steering apparatus for converting rotation of a steering assist motor into movement of a steering shaft in the axial direction thereof in accordance with steering operation using a ball screw mechanism wherein a female thread groove formed around an inner circumfere
7278938 Power transmission device October 9, 2007
A power transmission device includes a first one-way clutch that transmits a rotational power of a pulley to a rotating shaft, and a second one-way clutch that transmits a rotational power of a rotor of a motor to the rotating shaft. The first one-way clutch is of inner cam type in which
7275619 Electric power steering system October 2, 2007
An electric power steering system includes: a first rotation detection section including a first sensor section and outputting a signal corresponding to a rotation of an input shaft; a second rotation detection section including second and third sensor sections and outputting signals
7273141 One-way clutch integrated with a rolling bearing, and method of producing the same September 25, 2007
In a one-way clutch integrated with a rolling bearing, rolling elements and sprags are arranged in an annular space between an inner race and an outer race in each of which a one-way clutch raceway surface is formed in one axial side of a rolling bearing raceway surface. The rolling elem
7270484 Split outer race, split rolling bearing using same, and manufacturing method for split outer rac September 18, 2007
The present invention provides a split outer race for use in a rolling bearing. The split outer race is formed by bending a strip-shaped metallic plate into a substantially semicircle shape. At least one end of the split outer race in a circumferential direction has a concave-and-con
7270483 Rolling bearing unit September 18, 2007
A rolling bearing unit has an inner shaft and an inner race that is fitted on an outer circumferential surface of the inner shaft at one end side thereof. The inner race is fixed to the inner shaft by a clamping portion resulting from an end portion of the inner shaft. An annular stepped
7267626 Auto tensioner September 11, 2007
The boss portion of an arm is oscillatably supported with respect to a support member. A tension pulley is rotatably engaged with a tip portion of the arm. A guide plate is fixed to the axial tip portion of the support member to face the boss portion. A friction plate is sandwiched b
7258215 One-way clutch fixing structure August 21, 2007
Holes of a predetermined depth are formed in an outer peripheral surface of an outer ring. The outer ring is integrally connected to a housing by insert molding, so that a resin, forming the housing, is received in the holes. Alternatively, pins are fixedly inserted respectively in the
7249533 Ball screw device July 31, 2007
A ball screw device comprises a nut having a thread groove in the inner peripheral surface thereof, a screw shaft having a thread groove in the outer peripheral surface thereof and a plurality of balls interposed between the respective thread grooves. In the screw shaft, the thread g
7247111 Vehicle steering apparatus July 24, 2007
A vehicle steering apparatus comprises a rotation transmission mechanism 4 which connects a first shaft 3 connected to an operating member 2 with a second shaft 5 connected to vehicle wheels 9 so as to enable the rotation to be transmitted. An actuator 61 rotatably drives one of a plural
7240762 Electric power steering apparatus July 10, 2007
A gearing radius of a worm wheel is set corresponding to a neighborhood region of a steering neutral position, in such a way as to be relatively large. Thus, backlash is made to be relatively small. This prevents noises from being produced when an automobile travels straight on a bad
7240761 Electric power steering apparatus July 10, 2007
In a current control system for a cylindrical permanent magnet synchronous motor as the drive source of an electric power steering apparatus, proportional gain Kdp and integral gain Kdi of a d-axis current PI control portion 126 are respectively set to K1Ld and K1Rd on the basis of d
7237961 Rolling bearing July 3, 2007
A rolling bearing includes: an inner race; an outer race; rolling elements provided between the inner and outer races; and a seal member provided between end portions of the inner and outer races, which includes a core metal and a rubber seal including a recess and a projection at an out
7235905 Electric power steering assembly June 26, 2007
An electric power steering assembly includes an electric motor, a reduction mechanism for reducing the speed of an output rotation of the electric motor, and a reduction-mechanism housing accommodating therein the reduction mechanism. The electric motor includes: an output shaft rota
7233850 Vehicle steering apparatus June 19, 2007
An object of the present invention is to provide a vehicle steering apparatus that detects the tire load, and based on the detected tire load, performs steering control which accurately reflects the road conditions. A vehicle steering apparatus of the present invention includes a con
7229215 Double-split cage June 12, 2007
A double-split cage includes a strip-shaped metallic sheet curved into a semi-cylindrical shape and having several pockets for accommodating a single row of rollers arranged in the circumferential direction. The strip-shaped metallic sheet has two arch portions separately arranged in
7228933 Electric power steering device and joint June 12, 2007
In order to solve a problem of an electric power steering device of an automobile that the steering feeling is deteriorated by dragging the inactive electric motor if a steering member is operated at a small angle to leave an electric motor inactive while the automobile is running st
7226344 Method of processing antifriction bearing unit for wheel June 5, 2007
A method of processing an antifriction bearing unit for a wheel, the antifriction bearing unit including an outer race, an inner race, a plurality of rolling elements and a flange portion for directly or indirectly mounting a brake disk provided to one of the outer and inner races, t
7226069 Power-assisted steering system and difference compensating method for current detector June 5, 2007
A power-assisted steering system includes: two or more current detectors that detects current flowing to two or more phases of a motor and outputs detected current values; a correcting unit that corrects the detected current values output from the current detectors to compensate a di
7222693 Hydraulic control valve and power steering apparatus using the same May 29, 2007
The present invention provides a hydraulic control valve and a power steering apparatus using the same in which chamfer portions are provided only on throttle portions between oil supply chambers and first oil feed chambers and between the oil supply chambers and second oil feed cham
7222599 Rocker arm made of sheet metal and method of manufacturing the same May 29, 2007
A rocker arm includes: a body that is made of sheet metal and includes a pair of side walls; and a pair of axial holes that are respectively formed through the pair of side walls and have a first diameter and through which an axis is inserted. The pair of axial holes include thickene
7215110 Seal ring, sealing apparatus and bearing apparatus May 8, 2007
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 se
7213677 Motor-driven type power steering apparatus May 8, 2007
A motor-driven type power steering apparatus includes: a drive gear connected to an output shaft of a motor; a driven gear in mesh with the drive gear, which is connected to a steering unit; a bearing for supporting one end of the drive gear; a support portion in which the bearing is
7207933 Carburized roller member made of high carbon chromium steel April 24, 2007
A roller member comprising high carbon chromium bearing steel having a carburization treatment. The bearing steel comprising a surface portion defined as a range between a surface of a rolling face of the roller member to a depth where a maximum shearing stress acts thereon, the surf
7201685 Pulley unit April 10, 2007
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 di
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