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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8104968 | Rolling contact bearing The sectional shape of a rolling surface of at least one of bearing component parts has the following relation between the order n (n being an arbitrarily chosen natural number) and the amplitude r of waviness relative to the circularity of the sectional shape. The ... | 01/31/2012 |
| 7712966 | Cylindrical roller bearing A relief groove (23) is provided at a corner in which a track surface (21) and a flange surface (24) cross, in an inner ring (20) of a cylindrical roller bearing. A chamfer (42) is provided at a corner part in which a rolling surfa... | 05/11/2010 |
| 7435008 | Vehicle pinion shaft support system There are provided tapered roller bearings which support a pinion shaft. Inner races have large rib faces each having a recessed surface shape on which large-diameter end faces of tapered rollers slide. The surface roughness of the large-diameter end face is σ1 | 10/14/2008 |
| 7416346 | Cylindrical roller bearing A cylindrical roller bearing includes an inner ring having a flange portion provided with a roller guide-surface which guides the end faces 4a of the cylindrical rollers having diameter of Da. The end face 4a away from a center axis of th... | 08/26/2008 |
| 7334515 | Roller bearing and pump including same A roller bearing including a plurality of rollers which are provided between an outer circumferential surface of an inner member and an inner circumferential surface of an outer member; and a substantially cylindrical roller holder which has a plurality of pockets h... | 02/26/2008 |
| 7281855 | Tapered roller bearing and final reduction gear 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 ... | 10/16/2007 |
| 7282808 | Power generating wind turbine A power generating wind turbine includes parts and components installed in or on a nacelle which are made smaller and lighter, thus facilitating maintenance. A main shaft 11, a gear-box for speeding up rotation of the main shaft 11 and a generator 1... | 10/16/2007 |
| 7267487 | Bearing unit for wheel There is disclosed a bearing unit (5, 5a) for a wheel comprising a stationary race (6) having stationary race track surfaces (11a, 11b) on a peripheral surface on the stationary side thereof to be supported and fixed ... | 09/11/2007 |
| 7249892 | Rolling bearing When a minimum thickness of a part where an outer ring raceway is provided on a middle portion in the axial direction of an outer ring is h, and a diameter of each rolling element is Da, the relationship 0.4 Da≦h 0.8 Da is satisfied. As a result, even when the out... | 07/31/2007 |
| 7217038 | Fixing structure for rolling bearing In a fixing structure for a rolling bearing in which a bearing fixing ring is incorporated in a device and a rotating member is fixed to a bearing rotating ring using bolts, fastening areas with the bolts are set so that the natural frequency of the device as a whol... | 05/15/2007 |
| 7213973 | Rolling bearing in aircraft A single-row or multi-row rolling bearing comprising thin-walled bearing races which are made of a martensitic, through hardened steel and have the following characteristics: a surface hardness of ≧613 HV (56 HRC) in the area of the bearing face; a core hardness o... | 05/08/2007 |
| 7186029 | Rolling element bearing and motor A rolling bearing for supporting a shaft on which a fan is provided, has an inner ring having an inner ring race on an outer surface thereof, an outer ring having an outer ring race on an inner surface thereof, balls provided between the inner ring race and the oute... | 03/06/2007 |
| 7182169 | Steering system for small-sized vehicle A steering system for a small-sized vehicle is capable of coaxially arranging a steering shaft and a power steering apparatus with high accuracy. In the steering system, when the power steering apparatus is connected to the steering shaft, a plurality of bearings su... | 02/27/2007 |
| 7163341 | Bearing to be used for pulley in auxiliary device for engine A bearing to be used for a pulley in an auxiliary device for the engine of an automobile includes an outer ring 3, an inner ring 5, double rows of balls 7 and 8, retainers 9 and 10, and seals 11 and 12 which ar... | 01/16/2007 |
| 7150565 | Cylindrical roller bearing Contact surface pressure P increases rather drastically in proportion to skew angle θ within the range of 0 | 12/19/2006 |
| 7104695 | Asymmetric hub assembly A hub bearing assembly comprising a hub having a radially outwardly directed flange at one axial end for mounting the wheel of a vehicle, an outer ring having axially spaced raceways and a plurality of rolling elements arranged in two rows in the annular space betwe... | 09/12/2006 |
| 7090404 | Rolling element bearing for ultra-low viscosity fluids A rolling element having comprises an inner ring, an outer ring and a series of rolling elements which are in contact with the raceways of the rings, an ultra-low viscosity fluid being present in the contacts having a kinematic viscosity ν=(ηo/ρ) of le... | 08/15/2006 |
| 7077575 | Ball bearing An outer ring 3a is formed so as to have a large thickness and the pitch circle diameters Dp of balls 6 are shifted to the inside diameter side of the present ball bearing. The radiuses of curvature Ro, Ri of the section shapes of an outer ring ... | 07/18/2006 |
| 7048445 | Cylindrical roller bearing A cylindrical roller bearing suited for higher rotation speeds is provided, which can control heat generation, wearing, and other problems at contact portions between cylindrical rollers and flange portions. A cylindrical roller bearing is composed of an inner ring ... | 05/23/2006 |
| 7044016 | Ball screw A ball screw having: a screw shaft having a spiral ball rolling groove; a ball nut having a ball rolling groove corresponding to the ball rolling groove; and a large number of balls interposed between the ball rolling grooves so as to roll freely; wherein the ball r... | 05/16/2006 |
| 7033078 | Hydrodynamic bearing assembly and spindle motor having the same This invention is to provide a hydrodynamic bearing assembly, which realizes the high rotation rate in a stable manner and the robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing the contact in the thrust bea... | 04/25/2006 |
| 7006953 | Method and apparatus for predicting the life of a rolling bearing, rolling bearing selection apparatus using the life prediction apparatus, and storage medium A dynamic equivalent load P is calculated from data information of a rolling bearing. Next, a reliability coefficient a1 is determined, a lubrication parameter aL corresponding to a used lubricant is calculated, and a contamination degree coeff... | 02/28/2006 |
| 7001078 | Rolling bearing unit A rolling bearing unit includes a shaft body, an inner ring mounted on the shaft body, an outer ring concentric with the inner ring, and a plurality of balls between the inner ring and the outer ring. A caulking portion to be caulked onto the outer end face of the i... | 02/21/2006 |
| 6997617 | Roller bearing A roller bearing includes an inner ring, an outer ring, a plurality of cylindrical rollers each provided between rolling contact surfaces of the inner ring and the outer ring. Each of the cylindrical rollers includes an end face having a peripheral part that is crow... | 02/14/2006 |
| 6997616 | Radial roller bearing A radial roller bearing has: an outer ring; an inner ring; and, a cylindrical roller interposed between the outer ring and the inner ring, the outer and inner rings respectively including flange portions formed in the end portions thereof so as to be opposed to the ... | 02/14/2006 |
| 6955474 | Mounting of the bearing unit for a wheel hub in a suspension system of a motor vehicle The outer ring (3) of a motor-vehicle wheel-hub bearing (1) is housed in a cylindrical seat (9) of a strut (10) and is locked axially, on one side of the strut (10), by means of a radially inwardly-projecting rim (18) formed... | 10/18/2005 |
| 6948247 | Method for forming a bearing race for a cylindrical bearing A cylindrical roller bearing or needle roller bearing for use with a rolling raceway surface is subjected to a carbonitriding treatment to produce a layer containing 30 to 80% retained austenite in the vicinity of its surface that contacts a carburized layer of a ro... | 09/27/2005 |
| 6942392 | Rolling bearing of a small motor for an information-processing device A rolling bearing 1 is provided to support the rotating member of a small motor of an information-processing device wherein the groove radius ratio of the raceway groove of the inner race 2 is in the range from 52% up to 54%, while the groove radius ra... | 09/13/2005 |
| 6923576 | Rolling bearing and belt continuously variable transmission A rolling bearing has the radius of curvature of the raceway on an inner ring and an outer ring is from not smaller than 50.1% to not greater than 51.9% of the diameter of the balls, and at least one of the compositions of the bearing is obtained by forming an alloy... | 08/02/2005 |
| 6893372 | Roller bearing, transmission using the same and differential gear In order to improve a seizure resistance as well as restricting of a dispersion of a rotation torque, surface roughness of a large diameter side end face (4A) of a tapered roller (4) is defined as a value satisfying both the following conditional expre... | 05/17/2005 |
| 6868749 | Bearing configuration and method for reducing noise in a bearing A bearing configuration in which a shaft is supported by a first and second bearings, the second bearing being spaced from the first bearing. The first bearing and said second bearing are supported by a corresponding first bore and second bore in a shaft housing, a ... | 03/22/2005 |
| 6860640 | Tapered roller bearing In a tapered roller bearing having an outer ring whose outside diameter is D, an inner ring whose inside diameter is d, and a plurality of tapered rollers whose pitch circle diameter is dm, a setting is provided such that a PCD parameter expressed by 2 dm/(D+d) is a... | 03/01/2005 |
| 6843604 | Ultrathin-walled rolling bearing The designing of an annular integral type is established by forming a cage of a resin material that satisfies the condition (a) that the ratio of its linear expansion coefficient to that of bearing steel is not more than 2 or the condition (b) that its water absorpt... | 01/18/2005 |
| 6817770 | Single row deep groove radial ball bearing The radius of curvature r1, r2 of the cross-sectional shape of an inner ring raceway 11d is made smaller at a central portion 19 and larger at end portions 20. A contact ellipse at the end portions is made small by increasin... | 11/16/2004 |
| 6817768 | Roller bearing The present invention provides a roller bearing in which a plurality of rollers is interposed between an inner ring member and an outer ring member, and a flange having a guide surface for guiding an end surface of the roller in a sliding contact manner is provided ... | 11/16/2004 |
| 6793397 | Rotation support apparatus for compressor pulley A radial ball bearing 14 of the three point contact type or four point contact type is used for the rolling bearing for a compressor pulley. The offset amount δ, that is the axial distance between the center α of the radial load applied to the follower pull... | 09/21/2004 |
| 6727615 | Electric drive unit with a cylindrical bearing indented in the housing An electric drive unit for windshield wipers of a motor vehicle, including a drive motor having an armature accommodated in a substantially cup-shaped pole housing, a substantially cup-shaped gearbox, secured on a face end to the pole housing, for receiving gear ele... | 04/27/2004 |
| 6719458 | Ball bearing An outer ring 3a is formed so as to have a large thickness and the pitch circle diameters Dp of balls 6 are shifted to the inside diameter side of the present ball bearing. The radiuses of curvature Ro, Ri of the section shapes of an outer ring ... | 04/13/2004 |
| 6712518 | Preloading method for preload-adjustable rolling bearing and manufacture of the same An assembly method of a preload-adjustable rolling bearing unit comprising the steps of providing a shaft having a first inner raceway, an inner ring being press fitted onto the shaft and having a second inner raceway, such that a pitch of both raceways is set great... | 03/30/2004 |
| 6709164 | Tapered roller bearing A tapered roller bearing comprises: an outer race 12 having a raceway surface 21; an inner race 11 having a raceway surface 20; and a plurality of rolling elements 15 located between the raceway surfaces and formed by third generat... | 03/23/2004 |
