Nonbearing Magnetic Feature Patents (Class 384/446)
  • Patent number: 10525541
    Abstract: A transmission device is configured to generate at least one of a stroke motion and a reciprocating motion of an insert tool of a hand-held power tool, and includes at least one link unit configured to generate the stroke motion. The link unit includes at least one output element, at least one link element, at least one contact surface, and at least one further contact surface. The at least one contact surface is disposed at least partially on the at least one output element. The at least one link element is configured to act in combination with the at least one output element via the at least one contact surface. The at least one further contact surface is configured to generate a force that initiates the reciprocating motion, and is disposed at least partially on the at least one output element.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: January 7, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Daniel Saegesser, Michael Laett
  • Patent number: 9752623
    Abstract: An instrumented rolling bearing, comprising an outer ring and an inner ring having a rolling bearing chamber delimited therebetween. Rolling bodies are positioned in the rolling bearing chamber while being maintained by a rolling bearing cage. The rolling bearing further comprises a measuring device including at least one sensor suitable for measuring at least one operating parameter of the instrumented rolling bearing, the measuring device being at least partially integrated into the rolling bearing chamber bearing cage. The measuring device further comprises at least one cable or antenna that extends along the rolling bearing cage in the rolling bearing chamber. A method for manufacturing one such instrumented rolling bearing is also disclosed.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 5, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Thierry Adane, Laurent Varnoux, Olivier Verbe
  • Patent number: 9347495
    Abstract: A bearing assembly having an RFID (radio frequency identification) function, which can implement a communication and has a capability of accomplishing information communication on a non-contact basis. This bearing assembly includes an inlet, including an IC chip and an antenna connected with such IC chip, and a magnetic sheet, both of which are embedded in overlapped relation to each other in a bearing seal for sealing a bearing space.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: May 24, 2016
    Assignee: NTN CORPORATION
    Inventor: Hiroyoshi Ito
  • Patent number: 9239078
    Abstract: A bearing cage, including: a body fabricated of phenolic material and having an outer circumferential surface and an inner circumferential surface; and a coating of molybdenum disulfide or polytetrafluoroethylene adhered to the outer circumferential surface or the inner circumferential surface. A method of manufacturing a bearing cage, including: fabricating a body from phenolic material, the body including an outer circumferential surface and an inner circumferential surface connecting first and second sides; and adhering a coating of molybdenum disulfide or polytetrafluoroethylene to the inner or outer circumferential surface.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: January 19, 2016
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: William Moratz
  • Patent number: 9139042
    Abstract: A sealing device for a hub-wheel assembly that includes a rolling bearing is provided. The sealing device being has a screen assembled on an outer ring of the bearing and has an annular cylindrical wall, having an internal lateral surface press fit along an external lateral surface of a collar of the outer ring. The internal surface has a respective inner diameter (Di) and the external lateral surface has a respective outer diameter (De). A static sealing element is constrained to the screen; the ratio of the interference between inner diameter (Di) and outer diameter (De) over a screen thickness ranging between 0.22 and 0.5; a coupling length (L, L?) between the internal lateral surface and the external lateral surface is equal or greater than 5 mm; and a ratio between outer diameter (De) of the external lateral surface and coupling length (L, L?) ranging between 1 and 1.19.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: September 22, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Daniele Duch, Fausto Morello
  • Patent number: 9091309
    Abstract: Magnetorheological transmission device and method for influencing the coupling intensity of two components, which can be coupled and whose coupling intensity can be influenced. A channel is provided, which contains a magnetorheological medium with magnetically polarizable particles, which can be influenced by a magnetic field. A magnetic field generating unit generates a magnetic field in the channel in order to influence the magnetorheological medium in the channel. A body is disposed in the channel. A free distance between the body and the component is at least ten times greater than a typical mean diameter of the magnetically polarizable particles in the magnetorheological medium. A space with magnetorheological medium is disposed between the body and a component. The magnetic field is applied to the region in order to optionally chain together the particles and/or wedge or release them with the body.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: July 28, 2015
    Assignee: Inventus Engineering GmbH
    Inventor: Stefan Battlogg
  • Patent number: 9022660
    Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: May 5, 2015
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Shigeki Honda
  • Publication number: 20150117805
    Abstract: A structure which can ensure a movement of a seal lip 22a disposed in a seal lip 17a is realized by preventing foreign matters from permeating a seal internal space 26a between a slinger 16 and a seal ring 17a which configure a combination seal ring 12a. A labyrinth seal 27a is disposed between an outer peripheral edge of a rotary side annular portion 19 configuring the slinger 16 and an inner peripheral surface of a stationary side cylindrical portion 23 of a metal insert 20 configuring the seal ring 17a. In addition, a thickened portion 29 is formed in a portion of an elastic member 21 a configuring the seal ring 17a over an entire periphery. An auxiliary seal lip 32 whose rigidity is lower than that of respective seal lips 22a to 22c is disposed in the thickened portion 29 over the entire periphery. The auxiliary seal lip 32 prevents the foreign matters from adhering to the seal lip 22a, and prevents the movement of the seal lip 22a from being hindered.
    Type: Application
    Filed: November 29, 2012
    Publication date: April 30, 2015
    Applicant: NSK LTD.
    Inventors: Akinobu Takayama, Yasuhiro Shiono, Masamitsu Watanabe, Masayoshi Tanahashi, Hironari Sakoda
  • Publication number: 20150110427
    Abstract: A rolling bearing assembly includes an inner ring, an outer ring, at least one row of rolling elements disposed between raceways provided on the inner and outer rings, and an annular housing having at least one of the rings is arranged. The one ring includes two half ring parts, each half ring part having a radial portion and an inner and an outer axial cylindrical portions extending from the radial portion towards the outside. The inner axial cylindrical portion extend from the radial portion by a toroidal portion defining the raceway, each of the two half ring parts, defining with the annular housing, a closed space. A closed space or spaces can store lubricant and a passageway through at least one half ring part enables lubricant to pass from the closed space to the raceways. A magnetic and/or an electronic element is mounted inside at least one closed space.
    Type: Application
    Filed: January 26, 2012
    Publication date: April 23, 2015
    Inventors: Frank Berens, Stephane Cordier, Olivier Verbe
  • Patent number: 8981764
    Abstract: A rolling bearing sensor, especially a rotational speed sensor, having a housing and a signal pick-up which is arranged in the housing in a manner secured against rotation and is arranged, with the housing, in a stationary receptacle in a stationary part of a rolling bearing or in a stationary component adjoining a rolling bearing, for example, an axle journal, where the housing has an outer design via which the rolling bearing sensor in the receptacle is secured against rotation in a form-fitting manner. The sensor may have a groove which runs in the axial direction and interacts with a screw or a projection. Alternatively, a securing element which predefines a defined angular position may be pushed onto the sensor.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: March 17, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Marc-Andre Schaefer, Jens Heim
  • Publication number: 20150063733
    Abstract: A bearing with a magnetic fluid seal, wherein a plurality of rolling elements are interposed between an inner ring and an outer ring, and a ring-shaped magnet is arranged at an opening side of the inner and outer rings so as to retain magnetic fluid for sealing the plurality of rolling elements, and wherein the ring-shaped magnet is magnetized such that magnetic poles are oriented in an axial direction, the bearing comprising: a ring-shaped pole plate arranged so as to be in contact with an outer side surface of the ring-shaped magnet in the axial direction; outer-ring-side magnetic fluid retained between the outer ring and the ring-shaped pole plate and/or between the outer ring and the ring-shaped magnet; and inner-ring-side magnetic fluid retained between the inner ring and the ring-shaped pole plate and/or between the inner ring and the ring-shaped magnet.
    Type: Application
    Filed: April 16, 2013
    Publication date: March 5, 2015
    Inventor: Takeshige Ohara
  • Publication number: 20150063734
    Abstract: A device including a sealing assembly having a first annular shield constrainable to a rotating first member, a second annular shield facing the first shield and constrainable to a stationary second member, and an annular seal supported by the first shield and provided with annular lips cooperating with the second shield. The device has a signal generator device having a third shield constrainable to the first member and an annular signal generator element arranged facing the first and the second shields; wherein the first shield has a flange portion, having on a side of the first shield, a first and a second L-fold in opposite directions which delimit a first annular surface facing the annular lips and the second shield; wherein the annular signal generator element is delimited towards the second shield by a second annular surface facing the annular lips forming an obtuse angle with the first annular surface.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 5, 2015
    Applicant: AKTIEBOLAGET SKF
    Inventor: Daniele Duch
  • Publication number: 20150043847
    Abstract: A bearing assembly for rotatively holding a shaft with respect to a support member and comprises: a bearing, with a rotatable ring and a fixed outer ring to be immobilized within a housing of said support member. An encoder washer is fast in rotation with the rotating ring. At least one sensor is adapted to detect at least one rotation parameter of the encoder washer and a sensor body holds this sensor. An annular flange is used for mounting said sensor body with respect to the fixed outer ring. The annular flange has a first skirt and a second skirt which define, between them and a bottom wall of the flange, an annular recess for accommodating at least a part of the sensor body. In mounted configuration of the bearing assembly, the first and second skirts extend respectively towards the rotatable and fixed rings.
    Type: Application
    Filed: December 28, 2011
    Publication date: February 12, 2015
    Inventors: Sylvain Chaussat, Pierrick Maze
  • Patent number: 8950944
    Abstract: This instrumented bearing comprises a bearing and a sensor unit for sensing the angular position of the rotatable ring with respect to the fixed ring of the bearing, an encoder element which is fastened to the rotatable ring, and a sensing element fastened to the fixed ring, adapted to sense a parameter representative of the rotation speed of the rotatable ring. The sensing element is mounted in a casing fastened with the fixed ring. The casing provides a peripheral wall mounted on the fixed ring and which includes at least one snap portion adapted to be received in a recess of a surface of the fixed ring, and at least one axial blocking portion adapted to abut against a lateral surface of the fixed ring, perpendicular to the rotation axis of the instrumented bearing. Each snap portion and each blocking portion alternate around a central axis (X6).
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: February 10, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Francois Niarfeix, Alexandre Taillepied
  • Publication number: 20150036956
    Abstract: A bearing assembly having an RFID (radio frequency identification) function, which can be compactized and contributes to reduction in labor and cost and which can also implements a favorable communication and has a capability of accomplishing information communication on a non-contact basis. This bearing assembly includes an inlet (14), including an IC chip (16) and an antenna (17) connected with such IC chip (16), and a magnetic sheet (15), both of which are embedded in overlapped relation to each other in a bearing seal (5) for sealing a bearing space.
    Type: Application
    Filed: January 15, 2013
    Publication date: February 5, 2015
    Inventor: Hiroyoshi Ito
  • Patent number: 8931710
    Abstract: An improved rotary disc atomizer for use in, for example, spray dryers or congealers is disclosed. The rotary disc may be directly mounted to the shaft of a high-speed electrical motor. The high-speed electrical motor comprises a permanent magnet rotor and electro-magnetic bearings. The electro-magnetic bearings may be supported by one or more upper/lower bearing housings and used to enable frictionless support of the shaft/rotor and rotary disc. The atomizer system may further comprise a gas distributor enabled to dynamically adjust the velocity at which the gas leaves the radial vanes and meets with the atomized droplets.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: January 13, 2015
    Assignee: Dedert Corporation
    Inventor: Claude Bazergui
  • Patent number: 8920035
    Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: December 30, 2014
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Shigeki Honda
  • Publication number: 20140376846
    Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.
    Type: Application
    Filed: July 18, 2014
    Publication date: December 25, 2014
    Inventor: SHIGEKI HONDA
  • Patent number: 8890383
    Abstract: A bearing, which has a first bearing ring, a second bearing ring, a rolling element interposed between the two bearing rings and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit which has a high filling factor for the induction coil. The first claw of the claw ring is connected to a magnetically conducting section of the body of the first bearing ring in a magnetically conducting fashion. The magnetic poles of the pole pairs are mounted so as to be connected to a magnetically conducting section of the body of the second bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the two magnetic sections and the rolling element.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: November 18, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Thomas Rink
  • Patent number: 8878408
    Abstract: A bearing, which has a first bearing ring, a second bearing ring and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit, which has a high filling factor for the induction coil. Every claw ring is connected to a section of the body of the first bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the section of the body of the first bearing ring.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: November 4, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Thomas Rink, Stefan Kleiber, Martin Kram
  • Publication number: 20140248013
    Abstract: Construction is achieved that is able to prevent strain deformation in the axial direction of a flat plate section 21 of a cover 19a when a cylinder section 20 of the cover 19a, which covers the opening on the inside end in the axial direction of an internal space where an encoder 1 is located, is fitted into and fastened to the inside end section in the axial direction of an outer ring 7. A non-contact section 26a is formed all the way around the inside end section in the axial direction of the cylinder section 20 such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension L26 in the axial direction is two times or more the thickness dimension t19 of a plate member of the cover 19a.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: NSK LTD.
    Inventors: Jyunya INOHAE, Yoshio KANEKO, Masato NAGANO
  • Publication number: 20140193107
    Abstract: A bearing unit having an axis of rotation and provided with a stationary ring and a rotatable ring arranged coaxially with respect to one another, a magnetic encoder fixed onto the inner ring and extending in front of an annular surface of the stationary ring; and a protective cover mounted on the external ring to protect the encoder and close off a space defined between the two rings; an annular channel being formed in the stationary ring and sealing means being arranged between the side wall and the axial lug within the annular channel so as to seal the cover and prevent the infiltration of impurities between the cover and the axial lug.
    Type: Application
    Filed: January 8, 2014
    Publication date: July 10, 2014
    Applicant: Aktiebolaget SKF
    Inventors: Paolo Baratti, Andrea Serafini
  • Patent number: 8727626
    Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 20, 2014
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Rudolf Lueck, Anika Schoenicke
  • Patent number: 8678974
    Abstract: Mechanisms and methods for clamping force generation are described. In one embodiment, a clamping force generator system includes a permanent magnet bearing coupled to a traction ring and to a torque coupling. The traction ring can be provided with an electromagnetic bearing rotor and the torque coupling can be provided with an electromagnetic bearing stator. In some embodiments, a mechanical load cam, a permanent magnet bearing, and an electromagnetic bearing cooperate to generate a clamping force between the traction rings, the power rollers, and the idler. In other embodiments, a series of permanent magnet bearings and a mechanical bearing are configured to produce a clamping force. In one embodiment an electromagnetic bearing is coupled to a control system and produces an optimal clamping force that is associated with a torque transmitted in the transmission during operation.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: March 25, 2014
    Assignee: Fallbrook Intellectual Property Company LLC
    Inventor: Charles B. Lohr
  • Publication number: 20140044386
    Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.
    Type: Application
    Filed: October 16, 2013
    Publication date: February 13, 2014
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventor: SHIGEKI HONDA
  • Publication number: 20140029879
    Abstract: A combination of a drive shaft transmitting a torque and a bearing assembly mounting the drive shaft, characterized in that the bearing assembly (3) includes at least one integrated sensor device (4) for detecting a torsion-induced change of a magnetic field of a magnetized section (5) that is provided on the drive shaft (2) in the region of the bearing assembly (3) or is connected to the drive shaft (2) in a torque-resistant manner, the change of the field being a measure of the transmitted torque.
    Type: Application
    Filed: March 26, 2012
    Publication date: January 30, 2014
    Applicant: SCHAEFFLER TECHNOLOGIES AG & Co. KG
    Inventors: Horst Brehm, Armin Gerner, Eduard Beresch
  • Publication number: 20140010487
    Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic steel sheet with a cup-shaped configuration. The protective cover has a cylindrical fitting portion, a disk-shaped shield portion, a radially reducing portion, a stepped portion and a bottom portion. The cylindrical fitting portion is press-fit into the inner circumference of the inner-side end of the outer member. The disk-shaped shielding portion extends radially inward from the fitting portion, via the radially reducing portion. The inner-side surface of the shielding portion is arranged close to or in contact with a rotation speed detecting sensor. The bottom portion is continuous with the shielding portion, via the stepped portion to close the inner-side end of the inner member. A full deflection of the side surface of the shielding portion that is caused by a load the same as that applied to the protecting cover when it is press-fit into the outer member is limited to a predetermined value or less.
    Type: Application
    Filed: September 7, 2013
    Publication date: January 9, 2014
    Inventors: Makoto SEKI, Yasuhiro ARITAKE, Tomoko BABA, Tadashi MITSUISHI
  • Publication number: 20130322799
    Abstract: A tapered roller bearing (1) with two coaxial bearing rings (2, 3) and a multiplicity of tapered rollers (4) which are arranged between the bearing rings (2, 3), are guided in a cage (10, 11, 12) and roll on raceways (7, 8) on the bearing rings (2, 3), with a rim (9) at the large diameter of the inner bearing ring (3), wherein the cage (10, 11, 12) is formed of side rings (10, 11) and webs (12) which connect them, with the formation of pockets (13) for the tapered rollers (4), and elastic projections (14) are arranged on one side ring (10), which projections (14) interact with the rim (9) and prestress the cage (10, 11, 12) with the tapered rollers (4) axially against the rim (9).
    Type: Application
    Filed: February 6, 2012
    Publication date: December 5, 2013
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Thorsten Schlegel, Armin Necker, Werner Motzkus
  • Patent number: 8585295
    Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, includes a magnet for holding in a lubrication portion of the rolling bearing. A lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: November 19, 2013
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Shigeki Honda
  • Publication number: 20130209016
    Abstract: Construction is achieved that is able to prevent strain deformation in the axial direction of a flat plate section 21 of a cover 19a when a cylinder section 20 of the cover 19a, which covers the opening on the inside end in the axial direction of an internal space where an encoder 1 is located, is fitted into and fastened to the inside end section in the axial direction of an outer ring 7. A non-contact section 26a is formed all the way around the inside end section in the axial direction of the cylinder section 20 such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension L26 in the axial direction is two times or more the thickness dimension t19 of a plate member of the cover 19a.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 15, 2013
    Applicant: NSK LTD.
    Inventors: Jyunya Inohae, Yoshio Kaneko, Masato Nagano
  • Publication number: 20130195389
    Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic material with a substantially dish-shaped configuration. A cylindrical fitting portion is adapted to be press-fit onto the inner circumference of the inner-side end of the outer member. A disc-shaped shielding portion extends radially inward from the fitting portion, via a radially tapered portion. A bottom portion extends from the shielding portion, via a stepped portion. A flat relief portion is formed between the radially tapered portion and the shielding portion. The relief portion is parallel with the shielding portion. The relief portion is set slightly back from the shielding portion toward the radially tapered portion. An elastic member is integrally adhered to the outer circumference of the radially tapered portion. The elastic member elastically contacts with the inner circumference of the inner-side end of the outer member.
    Type: Application
    Filed: March 14, 2013
    Publication date: August 1, 2013
    Applicant: NTN CORPORATION
    Inventors: Makoto SEKI, Tomoko BABA
  • Publication number: 20130188896
    Abstract: Bearing unit having an axis of rotation (A) and provided with a stationary ring and a rotatable ring, these rings being coaxial with each other and axially delimited on one side (L) by respective axial surfaces which are transverse to the axis (A); a magnetic encoder fixed to an outer cylindrical surface of the inner ring; and a protective cover mounted on the outer ring to protect the encoder and to close off a space formed between the two rings, the axial surface of the outer ring and the protective cover jointly delimiting a compartment for housing said encoder, which is positioned substantially outside the space and extends radially from the outer cylindrical surface to a boundary in the proximity of an outer cylindrical surface of the outer ring.
    Type: Application
    Filed: January 23, 2013
    Publication date: July 25, 2013
    Applicant: AKTIEBOLAGET SKF
    Inventor: Andrea SERAFINI
  • Publication number: 20130142467
    Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.
    Type: Application
    Filed: May 31, 2011
    Publication date: June 6, 2013
    Applicant: ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
    Inventors: Rudolf Lueck, Anika Schoenicke
  • Patent number: 8439568
    Abstract: In a wheel support bearing assembly including double row rolling elements between an outer member and an inner member, a sensor unit is fitted to one of the outer and inner members, which serves as a stationary member. The sensor unit is made up of a sensor mounting member and at least one or more strain sensors fitted to the sensor mounting member. A sensor signal processing circuit to process an output signal from the strain sensor is provided in the sensor mounting member.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: May 14, 2013
    Assignee: NTN Corporation
    Inventors: Takayoshi Ozaki, Tomomi Ishikawa, Kentarou Nishikawa
  • Publication number: 20130057116
    Abstract: Provided with a sealed rotational output unit (3) which includes a tubular shaft (12) having an outer circumferential surface sealed with a ferrofluidic seal (13); a rotating output shaft (14) disposed inside the tubular shaft (12); and an O-ring (17, 18) that seals between the tubular shaft (12) and the rotating output shaft (14). When the rotating output shaft (14) is directly coupled to a hollow motor shaft (9), shaking thereof is absorbed by the O-ring (17, 18), causing no excessive stress to be produced on the bearing side of the hollow motor shaft (9) or on a bearing (15, 16) side of the ferrofluidic seal (13). Since the tubular shaft (12) rotates in conjunction with the rotating output shaft (14), the O-ring (17, 18) that seals therebetween does not degrade in sealing capability due to wear by sliding. The sealed rotational output unit can be used with high rotational accuracy by directly coupling to a hollow motor (2) without any joint.
    Type: Application
    Filed: May 12, 2011
    Publication date: March 7, 2013
    Applicant: HARMONIC DRIVE SYSTEMS INC.
    Inventor: Manabu Kino
  • Patent number: 8378665
    Abstract: A rotation sensor equipped wheel support bearing assembly detects rotational speed and rotational direction, in which a high resolution rotation signal is utilized in various vehicle controls with a suppressed size. The bearing assembly includes a plurality of rows of rolling elements between rolling surfaces in outer and inner members. A magnetic field generating element having anisotropy about a bearing center axis is provided in the outer member in alignment with the axis. The inner member is provided with a sensor for sensing the magnetic field of the magnetic field generating element oriented axially. The sensor detects the angle of rotation of the magnetic field generating element and is in the form of magnetic sensor arrays or elements for detecting the orientation of the magnetic field with a two-dimensional vector sensor to detect rotation of the magnetic field generating element.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: February 19, 2013
    Assignee: NTN Corporation
    Inventors: Masatoshi Mizutani, Toru Takahashi, Masahiro Kiuchi
  • Patent number: 8317651
    Abstract: Mechanisms and methods for clamping force generation are disclosed. In one embodiment, a clamping force generator system includes a permanent magnet bearing coupled to a traction ring and to a torque coupling. The traction ring can be provided with an electromagnetic bearing rotor and the torque coupling can be provided with an electromagnetic bearing stator. In some embodiments, a mechanical load cam, a permanent magnet bearing, and an electromagnetic bearing cooperate to generate a clamping force between the traction rings, the power rollers, and the idler. In other embodiments, a series of permanent magnet bearings and a mechanical bearing configured to produce a clamping force. In one embodiment an electromagnetic bearing is coupled to a control system and produces a specified clamping force that is associated with a torque transmitted in the transmission during operation.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: November 27, 2012
    Assignee: Fallbrook Intellectual Property Company LLC
    Inventor: Charles B. Lohr
  • Patent number: 8297848
    Abstract: The magnetic encoder (17) includes a slinger (18) fixed to a rotation-side raceway ring of a bearing and including an outer side surface (22) opposed to the side of a sensor to detect rotation speed of the rotation-side raceway ring and having a surface roughness Ra: 0.3 to 3.0 ?m, and an inner side surface (23) opposed to the side of a sealing member (16) to seal the bearing; a multipolar magnet (19) bonded to the outer side surface (22) through an adhesive; and a film (25b) formed on the inner side surface (23), having a surface roughness Ra of 0.3 ?m or less, and being in sliding contact with the sealing member (16).
    Type: Grant
    Filed: September 1, 2008
    Date of Patent: October 30, 2012
    Assignee: NTN Corporation
    Inventors: Tatsuo Nakajima, Arito Matsui
  • Publication number: 20120200145
    Abstract: In a wheel support structure for a motorcycle, a magnetic encoder 34 for detecting rotational speed is mounted and fastened to the inner circumferential surface of a cylindrical section 36a, which extends outward in the axial direction from the outer ring 22, of an encoder installation plate 35a that is attached to the end section in the axial direction of the outer ring 22 of the one of the rolling bearings 21a on the side toward the other rolling bearing 4, or is mounted and attached to the side surface toward the side of the other rolling bearing 4 of a slinger 73, which is attached to the end section in the axial direction of the outer ring 22b of the one of the rolling bearings 21a on the side toward the other rolling bearing 4 such that the end surface on the inner diameter side closely faces the outer surface of the inner ring 24 to form labyrinth space 42.
    Type: Application
    Filed: June 30, 2011
    Publication date: August 9, 2012
    Applicant: NSK Ltd.
    Inventors: Kouichi Kakuda, Hirokazu Yajima, Aya Kikuchi, Takashi Fujioka
  • Patent number: 8235650
    Abstract: A cooling fan includes a fan housing (30) having a central tube (34) extending upwardly therefrom, a bearing (60) being received in the central tube, a stator (20) being mounted around the central tube, and a rotor (10) having a shaft (18) extending through the bearing. At least one notch (180, 184) is defined in an end of the shaft. A balance structure (62) is mounted around the shaft, and has a portion facing and surrounding an upper portion of the at least one notch of the shaft. The balance structure is made of magnetic material, which can attract the shaft downward to thereby counter the upward force generated by the rotor when it is driven to rotate. Accordingly, the noise problem incurred by the floating of the rotating rotor can be resolved by the present invention.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: August 7, 2012
    Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
    Inventors: Bao-Hua Liang, Yong-Kang Zhang, Jian-Feng Yan, Ying-Min Huang
  • Publication number: 20120177312
    Abstract: A wheel bearing apparatus incorporating a rotational speed detecting apparatus has a protecting cover. A cylindrical fitting portion of the cover is press-fit into the end inner circumference of the outer member. A donut-shaped shielding portion extends radially inward from the fitting portion, via a radially reducing portion. A bottom portion is continuous with the shielding portion, via a stepped portion, to close the inner-side end of the inner member. A sealing member is integrally adhered to the outer circumference of the radially reducing portion. The sealing member and annular portion has a diameter slightly smaller than the outer diameter of the fitting portion of the protecting cover. The sealing member projected portion has a diameter slightly larger than the outer diameter of the fitting portion of the protecting cover. The projected portion is press-fit into the end inner circumference of the outer member via a predetermined interference.
    Type: Application
    Filed: March 16, 2012
    Publication date: July 12, 2012
    Applicant: NTN Corporation
    Inventors: Yasuhiro ARITAKE, Kazuo KOMORI
  • Patent number: 8147146
    Abstract: An output cable 16c of a magnetic sensor 16a, which extends outward in the tangential direction of an arcuate sensor holding portion 15a formed on an annular core member 15 from a sensor unit mounted in the sensor holding portion 15a, is fixedly molded in a mold resin 17b which is fixed in a through hole 15c formed in the sensor holding portion 15a near the sensor unit 16. As a result, the output cable 16c is prevented, even if tensed, from coming out of the sensor unit 16.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: April 3, 2012
    Assignee: NTN Corporation
    Inventor: Takayuki Norimatsu
  • Patent number: 8132964
    Abstract: A bearing includes an inner race member having an end surface. An outer race member is disposed about the inner race member. The outer race member has an internal shoulder for engaging the end surface of the inner race member. The inner and outer race members are configured to define a raceway between them and to define a snap ring seat between them. There are cylindrical rollers in the raceway and a snap ring in the snap ring seat. The bearing may be provided as a follower head on a cam follower or may be eccentrically mounted on a drive shaft to serve as a cam. A bearing can be assembled by inserting the inner race member into the outer race member, disposing cylindrical rollers in the raceway and disposing a snap ring in the snap ring seat.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: March 13, 2012
    Assignee: Roller Bearing Company of America, Inc.
    Inventors: Frederick S. Gyuricsko, Jay W. Phoenix
  • Publication number: 20120020602
    Abstract: A roller bearing, which has a brake device made of outer and inner bearing rings, between which rollers roll on corresponding rings, a displaceable braking element connected to one of the bearing rings pressed against an associated opposite surface connected to the other bearing ring to generate a braking effect due to a frictional fit, which can be neutralized by an electromagnet. The electromagnet is made of one of the hearing rings as a soft iron core, and a coil encompassing the ring. A ferromagnetic armature plate is connected to one of the bearing rings and is pressed towards a pressure plate, which is connected to the other bearing ring. At least one disc is disposed between the armature plate and pressure plate. The disc is operationally connected to brake linings on both sides, and each have a form-fit connection to one of the bearing rings by guide pins.
    Type: Application
    Filed: September 12, 2008
    Publication date: January 26, 2012
    Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
    Inventors: Christian Nuissl, Juergen Stoelzle
  • Publication number: 20120014631
    Abstract: A linear motion guide device includes a movable member attached onto an elongated member for forming an endless multiple-turn, helical raceway between the elongated member and the movable member and for receiving ball bearing members, and a detecting device includes a magnetic member and an integrated circuit disposed in the movable member and arranged close to the endless multiple-turn, helical raceway for detecting a moving frequency or a movement of the ball bearing members through the endless multiple-turn, helical raceway of the linear motion guide device and for detecting a wear or failure of the ball bearing members and for generating a warning signal.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 19, 2012
    Inventors: Fu-Chun HUANG, Yih-Chyun HWANG, Chun-Lin YU
  • Patent number: 8096710
    Abstract: The invention seeks to provide a rotor for use in rotary encoder, which is increased in magnetic intensity and mechanical strength thereby achieving exact detection of rotation speed. A corner portion formed between a cylindrical portion 21 and a mounting flange 22 of a core 20 constitutes a protrusion 23 unitized with the cylindrical portion and the mounting flange, protruded from axial one end of the cylindrical portion 21 and opened toward the axial other end thereof. A part of a pulser ring 31 is disposed in the protrusion 23.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: January 17, 2012
    Assignee: JTEKT Corporation
    Inventor: Yoshito Takada
  • Patent number: 8052330
    Abstract: In order to omit jostling caused between the adjacent rolling elements, a clearance is formed therebetween in a load region. A transfer path has a region that allows the rolling elements to contact only one of the transfer grooves of the transfer path, or a region that has a friction force acting between one of the transfer grooves of the transfer path and the rolling elements being greater than the friction force acting between another one of the transfer grooves of the transfer path and the rolling elements. The one of the transfer grooves in the region has a cross sectional shape taken in a direction perpendicular to the direction, in which the rolling elements are transferred, which cross sectional shape allowing two point contact with the rolling elements; and the rolling apparatus further has a contact-angle changing path that has a contact angle with the rolling elements that is greater than the contact angle of the other portion of the transfer path.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: November 8, 2011
    Assignee: Coo Space Co., Ltd.
    Inventor: Sosuke Kawashima
  • Publication number: 20110235956
    Abstract: A bearing includes a main body, a plurality of first magnetic members, a plurality of second magnetic members, and a plurality of friction members. The main body defines a pivot hole, and a plurality of first receiving portions and a plurality of second receiving portions around the pivot hole. Each of the second receiving portions defines a cutout. The first magnetic members are received in the first receiving portions. The second magnetic members together with the friction members are received in the second receiving portions, thus generating a repelling force between the first magnetic members and the second magnetic members to impel the friction members to partially extend out of the cutouts.
    Type: Application
    Filed: June 24, 2010
    Publication date: September 29, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: SHEN-CHUN LI, SHOU-KUO HSU, YUNG-CHIEH CHEN, HSIEN-CHUAN LIANG, SHIN-TING YEN, HUNG CHAO
  • Patent number: 7988363
    Abstract: To downsize a bearing assembly with a rotation detection device, a magnetic generating element (2) having a directionality about a rotation axis O is provided on an inner race (21) side of the bearing assembly (20). A rotation sensor (3) capable of detecting a magnetism of the magnetic generating element (2) and outputting information descriptive of rotation or angle is fitted to an outer race (22) side in alignment with a bearing axis. The magnetic generating element (2) is fixed to a fixing member, for example, a rotary shaft (10) that is fixed to an inner diametric side of the inner race (21) of the bearing assembly (20).
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: August 2, 2011
    Assignee: NTN Corporation
    Inventors: Toru Takahashi, Yoshitaka Nagano, Hiroshi Isobe, Takashi Koike
  • Publication number: 20110158570
    Abstract: A rotation detecting device, which is simple in structure and capable of detecting the absolute angle accurately with a high resolution, includes a plurality of ring-shaped magnetic encoders provided concentrically with each other and having different numbers of magnetic poles, each of the magnetic encoders having a magnetization row pattern with magnetic poles arranged circumferentially thereof; a plurality of magnetic sensors each operable to detect a magnetic field emanating from the corresponding magnetic encoder; and an angle calculating unit for determining an absolute angle of the magnetic encoders based on magnetic field signals detected by the magnetic sensors; in which the magnetic encoders are fitted to at least one core metal that is formed integrally with a projection portion protruding towards an encoder support surface side, on which the magnetic encoders are mounted, the projection portion being situated between the neighboring magnetic encoders.
    Type: Application
    Filed: September 10, 2009
    Publication date: June 30, 2011
    Applicant: NTN CORPORATION
    Inventors: Toru Takahashi, Shintarou Ueno, Pascal Desbiolles, Cyril Peterschmitt