Patents Assigned to SKF
  • Sealing device
    Patent number: 6880830
    Abstract: A sealing device for sealing off an opening between a shaft and a grease-lubricated split bearing housing comprises two halves divided by a diametrical cut and each having a main body arranged in a circumferential groove in the bearing housing opening. The sealing device is provided with sealing lips spaced apart from each other and forming an intermediate grease reservoir, and reinforcing portions arranged between the main seal body and the sealing lips to facilitate sealing engagement between the sealing lips and a shaft when an upper bearing housing half arranged with the upper seal half is mounted onto the shaft while the shaft is resting in a lower bearing housing half arranged with the lower seal half.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: April 19, 2005
    Assignee: SKF Mekan AB
    Inventors: Henrik Olsson, Jörgen Stendahl
  • Method and device for integrated cable signal adjustment
    Publication number: 20050076720
    Abstract: A method and a device for integrated cable signal adjustment is employed when mounting a bearing on a shaft, whereby strain is measured at the bearing ring while it is driven along the shaft, and the instantaneous clearance reduction in the bearing is calculated based on the measured strain, with the clearance reduction being used to determine the amount the bearing should be driven along the shaft. A systematic measurement error in the form of a too high measurement result appearing when the strain measurement takes place on the side face of the bearing ring is compensated for using a compensating device connected in a cable extending between a sensor fitted to the point of measurement and an indicator displaying the measurement result. The compensating device lowers the measurement signal before reaching the indicator, with a factor corresponding to the measurement error.
    Type: Application
    Filed: August 19, 2004
    Publication date: April 14, 2005
    Applicant: Aktiebolaget SKF
    Inventors: Johan Falk, Annika Lidstrom
  • Valve shaft seal
    Patent number: 6877719
    Abstract: A valve shaft seal includes a reinforcing ring having a cylindrical section extending over a certain axial length and possessing an outer diameter, a sealing element disposed on the reinforcing ring, and a valve spring supported on a radially extending end section of the reinforcing ring. To support the valve spring on the radially extending end section of the reinforcing ring, the radially extending end section extends radially farther inward in the direction of the axis of the valve shaft seal than the outer diameter of the cylindrical section of the reinforcing ring.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 12, 2005
    Assignee: AB SKF
    Inventor: Werner Heinl
  • Sealing device with a sensor adjacent an encoder wheel for a rolling bearing
    Patent number: 6879148
    Abstract: Sealing device (1) with a sensor for a rolling bearing (2), in which the sealing shield (7) is mounted between two races of the rolling bearing (2), and a encoder wheel (8) is arranged inside the rolling bearing (2) between the two races and the shield (7); a detecting (9) sensor being arranged inside a housing (10) which is obtained through the shield (7) and which is also arranged with a respective detecting surface which directly faces the encoder wheel (8).
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: April 12, 2005
    Assignee: SKF Industrie S.p.A.
    Inventors: Andreas Ruetter, Claudio Savarese, Dino Bellion, Angelo Vignotto
  • Braked bearing
    Patent number: 6868948
    Abstract: A locked antifriction bearing, for control wheel, includes an outer part and an inner part, one being rotating and the other non-rotating through at least a row of rolling elements arranged between said rotating and non-rotating parts, the device further comprising elements for detecting rotation parameters and elements for braking the rotating part. The braking elements comprise an axial stack of discs maintained in frictional contact through at least a disc angularly secured to the non-rotating part and at least a disc integral with the rotating part. The braking elements comprise at least an elastic washer for providing axially prestressed mutual contact of the friction surfaces of the discs.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: March 22, 2005
    Assignee: SKF France
    Inventor: Franck Landrieve
  • Roller bearing
    Publication number: 20050058383
    Abstract: A roller bearing (e.g., a cross taper roller bearing) includes an outer ring, an inner ring and rolling elements (e.g., taper rollers) located between the inner and outer rings. The rolling elements are kept at a distance by a cage formed from a number of individual cage segments. Each cage segment has two opposing guide sections for one of the rolling elements to at least partially encompass the rolling element on both sides. In addition, for the rolling elements bordering the one rolling element, the cage segment has guide sections which, in interaction with a corresponding guide section of an adjacent cage segment, at least partially encompass the bordering rolling elements.
    Type: Application
    Filed: July 30, 2004
    Publication date: March 17, 2005
    Applicant: AB SKF
    Inventors: Gunter Neder, Rut Heemskerk, Bruno Schemmel, Jurgen Reichert, Robert Grull, Burkard Beck, Alfred Schwappach, Stefan Wagner
  • Mounting unit for sensor systems
    Patent number: 6865962
    Abstract: A mounting unit for a sensor system includes a sensor wheel adapted to be mounted on a shaft, a sensor device adapted to be disposed on a sealing flange which seals the shaft, and a removable calibration aid fixing the sensor device in a precalibrated position on the sensor wheel. A process for mounting a sensor system involves aligning a sensor wheel and a sensor device in an aligned position relative to one another in a precalibration process, bringing together the sensor wheel and the sensor device in the aligned position with a calibration aid to form a mounting unit, positioning the mounting unit in a precise position on a shaft, fastening the sensor device to a sealing flange, and removing the calibration aid from the sensor wheel and the sensor device. The sealing flange can also be added to form a part of the mounting unit.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: March 15, 2005
    Assignee: AB SKF
    Inventors: Alexander Görg, Bernd Stephan
  • Bearing-hub unit for motor vehicle wheel
    Patent number: 6866422
    Abstract: A hub-bearing unit for a motor vehicle wheel comprises a bearing housed in a central axial cylindrical seat of a radially outer annular hub adapted for connection to the wheel of a vehicle. The bearing has an rotating ring the axial width of which is greater than that of the cylindrical seat. The outer ring comprises at least one tubular projection extending axially from one side of the outer ring. The tubular projection comprises an end portion projecting beyond a side surface of the hub and cold deformed in a radially outer direction towards said side surface, so as to lock the outer ring on the hub.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 15, 2005
    Assignee: SKF Industrie S.p.A.
    Inventors: Andrea Griseri, Francesco Savarese
  • Roller bearing
    Patent number: 6866423
    Abstract: A roller bearing includes at least one inner ring and at least one outer ring, with at least one of the inner and outer rings being comprised of at least four segments. In addition, at least one of the segments is provided with a mechanism for moving the segment in the radial direction. This radial setting mechanism can be in the form of a cam that functions between the segment and a housing accommodating the segment.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: March 15, 2005
    Assignee: AB SKF
    Inventors: Barbara Faltus, Werner Göbel, Günter Neder, Armin Olschewski
  • Device for supplying pressurized air through the hub to the tire of a motor vehicle wheel
    Publication number: 20050053317
    Abstract: The device (B) comprises a first non-rotatable ring (11) to be mounted adjacent to a non-rotatable race (1) of a bearing unit (A), and a second rotatable ring (12) to be coupled fast for rotation with a rotatable race (2,3) of the bearing unit (A). A first air passage (13, 113) is formed through the first non-rotatable ring (11) and a second air passage (14) is formed through the second rotatable ring (12). A sealing device (15, 16) interposed between the first (11) and the second (12) ring, defines an intermediate chamber (17) communicating with the first (13, 113) and the second (14) air passages.
    Type: Application
    Filed: November 20, 2003
    Publication date: March 10, 2005
    Applicant: SKF INDUSTRIE S.P.A.
    Inventor: Simona Pilone
  • Device for converting rotary motion into translational motion
    Publication number: 20050050973
    Abstract: A device for converting rotary motion into translational motion comprises a first component and a second component, with the second component being arranged to be able to turn around an axis of rotation relative to the first component and to move in the axial direction. Each component is provided with at least one track in which are arranged roll bodies. To produce a relatively high axial force with relatively small dimensions of the device, the tracks are arranged at opposing faces of the two components, with the tracks extending in a circle around the axis of rotation and in a spiral manner with a given pitch over the periphery of the components.
    Type: Application
    Filed: July 21, 2004
    Publication date: March 10, 2005
    Applicant: AB SKF
    Inventors: Armin Olschewski, Manfred Brandenstein, Barbara Faltus, Hauke Hans, Koos Zwarts
  • Method and apparatus for detecting and signalling derailment conditions in a railway vehicle
    Patent number: 6860453
    Abstract: A wheel (1) of a railway vehicle is associated with a vibration sensor (3) for supplying a vibration impulsive signal (V), indicative of the vibration of the wheel, to an electronic processing unit (E). This generates, based on the vibration signal (V), an impulsive surveillance signal (S) the instant value of which is increased in a manner correlated to the amplitude of each vibration impulse (I) and decreased in accordance with a predetermined law after each vibration impulse. The processing unit (E) compares the instant value of the surveillance signal (S) with a reference threshold value (T) and automatically generates an alarm signal (A) when the instant value of the surveillance signal (S) reaches or exceeds the reference threshold value (T).
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: March 1, 2005
    Assignee: SKF Industrie S.p.A.
    Inventors: Roberto Moretti, Silvano Sema
  • Clutch actuator unit
    Patent number: 6848557
    Abstract: A clutch actuator unit comprises a housing (8, 9), a screw mechanism and an actuator head which at one end engages the screw mechanism (1, 2) and at the other end has an actuating end (18), which actuator head (16) can be displaced in axial direction by the screw mechanism upon driving the screw mechanism. The actuating end (18) of the actuator head (16) is displaceable in transverse direction with respect to the screw mechanism as well.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: February 1, 2005
    Assignee: SKF Engineering and Research Centre B.V.
    Inventors: Hendrikus Jan Kapaan, Jacobus Zwarts, Bernardus Gerardus Van Leeuwen, Nicolaas Kollaard, Alexander Molenaar, Frédéric Ponson
  • Bearing assembly for the hub of a motor vehicle wheel
    Publication number: 20050017586
    Abstract: A bearing unit for a vehicle wheel hub is associated with a rotation sensing device and an electromagnetic inductive coupling. The rotation sensing device comprises an impulse ring (18) secured for rotation with the rotatable race (13) of the bearing unit by means of a rotatable annular carrier (19), and a magnetic/electric transducer (20) mounted to the stationary race (12) of the bearing unit by means of a stationary annular carrier (21) and operatively facing the impulse ring (18). The electromagnetic inductive coupling comprises a stationary coil (24) electrically connectable to a power supply (32) and carried by the stationary annular carrier (21), and a rotatable coil (25) electrically connectable (26) to an electric or electronic device mounted on the wheel. The rotatable coil (25) is carried by the rotatable annular carrier (19) and is electromagnetically linked to the stationary coil (24).
    Type: Application
    Filed: June 30, 2004
    Publication date: January 27, 2005
    Applicant: AKTIEBOLAGET SKF
    Inventors: Bruno Giai, Alexander Molenaar, Simona Pilone, Simon Van Ballegooij
  • Sensor assembly and sensor system for combined bearing load sensing and bearing health monitoring
    Patent number: 6845672
    Abstract: Sensor assembly for measuring a load on a bearing having at least one bearing ring (11), the at least one bearing being provided with a cavity (12) for holding the sensor assembly. The sensor assembly comprises a series mounting between opposing sides (17, 18) of the cavity (12), the series mounting comprising a piezoelectric plate (16) and a spring (19) with spring stiffness k. Alternatively, the sensor assembly further comprises a body (14) with mass in mounted between the piezoelectric plate (16) and the spring (13), to allow simultaneous load measurement and health monitoring.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: January 25, 2005
    Assignee: AB SKF
    Inventors: Hendrik Anne Mol, Simon Van Ballegooij
  • Actuator having a central support and brake calliper comprising such actuator
    Patent number: 6837342
    Abstract: An actuator comprises a housing (8) which contains a screw mechanism (9) and a motor (10) which is drivably connected to the screw mechanism (9), said screw mechanism providing a linear movement in response to a rotational movement of the motor, and comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (8). The linearly displaceable member of the screw mechanism is drivingly connected to a pump mechanism for providing a flow of medium.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: January 4, 2005
    Assignee: SKF Engineering & Research Centre B.V.
    Inventors: Armin Herbert Emil August Olschewski, Hendrikus Jan Kapaan, Clair Druet, Thomas Wilhelm Fucks, Manfred Antensteiner, Andries Christiaan Rinsma, Jiri Gurka, Alexander Jan Carel De Vries
  • Continuously variable transmission system
    Patent number: 6837818
    Abstract: A continuously variable transmission system comprises a continuously variable transmission having two pulley sets each with two discs defining a V-shaped groove, drive means-for varying the width of said groove and a belt extending between said-pulley sets in the grooves thereof, as well as a forward-reverse control connected to the shaft of one of the pulley sets and a clutch connected to said forward-reverse control, said pulley sets, forward-reverse control and clutch each being provided with a respective actuator. The actuators of the forward-reverse control and of the clutch are of an electromechanical type.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: January 4, 2005
    Assignee: SKF Engineering and Research Centre B.V.
    Inventors: Hendrikus Jan Kapaan, Johannes Albertus Van Winden, Bernardus Gerardus Van Leeuwen, Arno Stubenrauch, Hubert Herbst
  • Method for the production of a part of a rolling bearing
    Patent number: 6837946
    Abstract: Method for the production of a part of a rolling bearing, such as a ring for a ball bearing. The starting material used is a grade of steel containing 0.90 1.00% C; at most 0.15% Si; 0.25-0.45% Mn; at most 0.0015% P; at most 0.010% S; 1.30-1.50% Cr; at most 0.15% Ni; 0.20-0.23% Mo; at most 0.20-0.23% Cu; at most 20 ppm Ti; at most 8 ppm O. Before subjecting this grade of steel to a quenching and tempering treatment, the shaped item is subjected to plastic deformation in the hot or cold state. The mechanical properties and in particular the anticipated life under severe stress improve as a result.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: January 4, 2005
    Assignee: SKF Engineering and Research Centre B.V.
    Inventors: John Michael Beswick, Michel Christian Gorenne, Antonin Ballay
  • Grease lubricated bearing housing
    Publication number: 20040264823
    Abstract: A grease lubricated bearing housing is provided with an opening receiving a shaft and has a housing wall arranged to form a seat for the outer race ring of a bearing, with a space on each axial side of the seat that being limited by an axially extending wall portion and a radial gable wall. The wall of the housing is provided with a through bore for receiving a grease nipple, with the bore opening into the interior of the housing in at least one of the two spaces axially outside the bearing seat. The interior of the housing wall is provided with a material conglomeration positioned relative to the through bore so that the material conglomeration forms a shield urging grease introduced through the through bore to move primarily towards the bearing seat while also preventing grease from primarily filling out the space into which the through bore opens.
    Type: Application
    Filed: January 28, 2004
    Publication date: December 30, 2004
    Applicant: Aktiebolaget SKF
    Inventors: Henrik Olsson, Jorgen Stendahl, Kjell Clasborn
  • Hub and break rotor assembly for a vehicle wheel
    Patent number: 6821022
    Abstract: A wheel assembly includes a hub and bearing unit in which an annular hub has an axial cylindrical seat with an outer ring of a bearing fitted thereto with radial interference. The ring is locked axially on the hub between a pair of annular rims which project radially outwardly from the outer cylindrical surface of the ring and have been cold-deformed so as to engage two opposite surfaces of the hub. The hub also has an outer radial flange for fixing a brake rotor which in turn has an inner radial flange arranged substantially in the same plane as the flange. The brake rotor is locked axially on the hub by at least one cold-deformed annular rim which projects radially outwardly from the flange on the hub so as to engage a respective one of two radial surfaces of the flange.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: November 23, 2004
    Assignee: SKF Industrie S.p.A.
    Inventors: Marco Brunetti, Andrea Griseri