Patents Assigned to SKF
  • METHOD AND DEVICE FOR SEALING DIFFERENT OIL ENVIRONMENTS
    Publication number: 20120138416
    Abstract: A method and device are provided for sealing a first oil environment, which is located on a first side of a movable piston guided in a hollow chamber, from a second oil environment, which is located on a second side of the piston. The piston can move back and forth in the hollow chamber between the two oil environments in the axial direction by a piston stroke length (d). Two annular seal elements are disposed around the movable piston so as to sealingly contact the inner circumferential wall of the hollow chamber. The annular seal elements are spaced from each other by at least a distance (D) in the axial direction that is greater than or equal to the piston stroke length (d).
    Type: Application
    Filed: November 29, 2011
    Publication date: June 7, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventor: Jurgen KURTH
  • ROLLING BEARING FOR TENSIONING ROLLER DEVICE AND ASSOCIATED TENSIONING ROLLER
    Publication number: 20120142468
    Abstract: Rolling bearing, for a tensioning roller, comprising an inner race, an outer race mounted so as to rotate about the inner race and at least one row of rolling elements placed between the inner race and outer race, the said inner race comprising an axial portion extending axially beyond the outer race. The rolling bearing comprises an insert fitted into an open-ended bore made in the axial portion of the inner race.
    Type: Application
    Filed: December 1, 2011
    Publication date: June 7, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Romuald LESCORAIL, Eric ROBERT
  • ELECTRONIC DRIVE HAVING AN ELECTRO-MECHANICAL BREAK
    Publication number: 20120139457
    Abstract: An electronic drive includes an electro-mechanical brake associated with a direct-current motor. A first valve or diode connects one of the terminals of the direct-current motor with the first electrical terminal of the brake in a forward direction. A second valve or diode connects the other terminal of the direct-current motor with the first electrical terminal of the brake. A second electrical terminal of the brake is at least indirectly connected with a reference voltage.
    Type: Application
    Filed: November 28, 2011
    Publication date: June 7, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Remy Bringold, Klaus Pfeuffer
  • PUMP FOR CONVEYING A MEDIUM AND LUBRICATING SYSTEM CONTAINING THE SAME
    Publication number: 20120132287
    Abstract: A pump for conveying a medium comprises a pump chamber having an intake opening and an outlet opening. A movable component is movably disposed in the pump chamber in order to convey a batch of the medium, which is located in the pump chamber, from the intake opening to the outlet opening. A ventilation device has a ventilation opening in fluid communication with the pump chamber. The ventilation opening is different from the intake opening and the outlet opening. The ventilation device is configured to reduce or at least substantially prevent, at least temporarily, the formation of a partial vacuum or a negative pressure in the pump chamber.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 31, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Jürgen KREUTZKAEMPER, Paul SATTELBERGER, Stefan SCHÜRMANN
  • PRESSURE SWITCH
    Publication number: 20120132507
    Abstract: A pressure switch comprises a housing having a cavity for conveying a pressurized fluid. The cavity extends from an inlet to an outlet and defines a flow path for the fluid. A pressure-transducing element is provided for measuring the fluid pressure. The pressure-transducing element is in fluid communication with the cavity and is at least partially disposed in the flow path between the inlet and the outlet. The pressure-transducing element has a cylindrical shape with a constant diameter and is partially disposed in a bore in the housing. The bore has a constant bore diameter. One end of the pressure-transducing element extends into the flow path.
    Type: Application
    Filed: September 2, 2011
    Publication date: May 31, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Marcus Kampf, Jürgen Kreutzkämper, Fabian Schmidt, Dieter Schönherr
  • RADIAL SHAFT SEAL WITH RETAINING DEVICE FOR A TENSION SPRING
    Publication number: 20120134613
    Abstract: A radial shaft seal includes a seal ring connected to a support ring and having a seal lip that extends radially inwardly. A tension spring urges the seal lip radially inward against a seal raceway during operation of the radial shaft seal. A retaining device retains the tension spring and is radially supported on a rigid inner circumferential wall that radially surrounds the tension spring. The retaining device may be configured to at least one of: (i) limit a widening of the diameter of tension spring caused by centrifugal force to a predetermined upper limit and (ii) prevent the tension spring from flying off during operation at high rotational speeds.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 31, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventor: Ferdinand SCHWEITZER
  • Disengageable pulley device
    Patent number: 8172056
    Abstract: Disengageable pulley device comprising a pulley mounted on a shaft by means of a rolling bearing and of a freewheel, the pulley comprising a rim mounted on the periphery of a one-piece outer race of substantially tubular shape comprising, on an inner surface, at least one raceway for rolling elements and at least one contact seat of cylindrical revolution for lock-up elements of the freewheel, a one-piece inner race forming a torque transmission shaft and including, on an outer surface coming opposite the outer race, at least one raceway for the rolling elements and at least one contact seat of cylindrical revolution for the lock-up elements of the freewheel.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: May 8, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Pierre-Julien Barraud, Gwenael Hingouet, Jean-Philippe Gaborel
  • Bearing assembly
    Patent number: 8172065
    Abstract: A bearing assembly (1) includes at least one bearing (3) that rotatably supports a cylindrical roller tube (2). A cushioning layer (5) is disposed, directly or indirectly, between a ring (4) of the bearing (3) and the cylindrical roller tube (2). At least one contact surface (6, 7) for the cushioning layer (5) extends over a defined axial distance (L) at an angle (?) to the rotational axis (A) of the bearing assembly (1).
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: May 8, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Sandra Kamm, Peter Horling, Armin Olschewski, Edgar Pickel
  • HALL-EFFECT SENSOR ARRANGEMENT
    Publication number: 20120105057
    Abstract: A sensor arrangement is operative to sense a relative kinematic state of a magnet (110) and a Hall-effect sensor (202) with respect to each other. The Hall-effect sensor has a Hall plate (204) and is accommodated in a surface-mount device. The magnet is configured for generating a magnetic field having an orientation primarily parallel to the Hall plate. The sensor arrangement comprises magnetic-field collecting means (206) for changing the orientation of the magnetic field to be primarily perpendicular to the Hall plate.
    Type: Application
    Filed: July 15, 2009
    Publication date: May 3, 2012
    Applicant: SKF B.V.
    Inventor: Hendrick Anne Mol
  • Cage for a roller bearing and method of producing the same
    Patent number: 8157446
    Abstract: A cage for a roller bearing comprises a base body with a plurality of pockets for the reception of the roller elements of the roller bearing. At least a part of the surface of the base body is coated with a layer consisting of or containing fullerene-like carbon nitride (FL-CNx), wherein an inter-layer of chromium (Cr) or aluminum (Al) or molybdenum (Mo) or titanium (Ti) or tungsten (W) or a diamond-like coating (DLC) or a metal-mix diamond-like coating (Me-DLC) is arranged between the surfaces of the base body and the layer consisting of or containing fullerene-like carbon nitride.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: April 17, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Steuart Horton, Lars Hultman
  • Ball bearing cage
    Patent number: 8157449
    Abstract: Cage 4 for a ball bearing, comprising an annular heel 7 and a substantially axial portion 8 provided with claws 11 defining pockets 9 for balls and connected to the heel 7, the substantially axial portion 8 extending axially over a part of the pockets 9. The substantially axial portion 8 has an outside diameter smaller than the outside diameter of the heel 7, the outside diameter of the substantially axial portion being somewhere between the pitch circle diameter of the cage reduced by half the radial thickness of the heel and the pitch circle diameter of the cage increased by half the radial thickness of the heel.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: April 17, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Armel-Louis Doyer, Frank Berens, Thierry Adane, Nicolas Baillieul, Alexandre Manceau
  • SEALING DEVICE WITH AN INTEGRATED ENCODER FOR BEARINGS
    Publication number: 20120087610
    Abstract: The device is to be fitted at a side of a bearing unit in order to seal a gap (15) between a stationary race (11) and a rotatable race (10) of the bearing unit. The device includes a relatively rigid reinforcing insert (16) of disc-annular shape, and a gasket (17) of relatively soft rubber or elastomeric material, over-moulded or vulcanized onto the insert (16). The gasket forms two opposite peripheral sealing portions (18, 19) intended to perform a static sealing action against the rotatable race (10) and a dynamic sealing action on the stationary race (11), respectively. The insert (16) comprises magnetized or magnetizable material for forming, at predetermined angular zones or fields, a sequence of alternate and/or spaced north/south poles, in order to act as an encoder.
    Type: Application
    Filed: December 19, 2011
    Publication date: April 12, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventor: Stellario BARBERA
  • BEARING ASSEMBLY
    Publication number: 20120067152
    Abstract: A roller bearing comprises at least two rows of rollers disposed between an inner ring and an outer ring. At least two tracks guide the respective rows of roller and are defined in the axial direction of the inner ring or the outer ring. At least one flange abuts axial ends of axially-adjacent rows of rollers and extends radially from a radially outer side or a radially inner side of the inner ring or the outer ring. At least one recess is defined on the side of the inner ring or the outer ring that is opposite of the radially outer side or the radially inner side of the inner ring or the outer ring, from which the at least one flange radially extends. The at least one recess at least partially overlaps the at least one flange in the axial direction.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 22, 2012
    Applicant: Aktiebolaget SKF
    Inventors: Armin OLSCHEWSKI, Arno STUBENRAUCH
  • Wheel bearing
    Patent number: 8137000
    Abstract: A wheel bearing for a driven wheel provided with a roller bearing module includes an outer ring and a hub which can be slide onto the outer ring from at least from one side such that it encompasses a partial area of the outer covering of the outer ring, wherein at least one area of the outer covering of the outer ring and one area of an inner covering of the hub are embodied in the form of a conical covering so that they match each other and can be arranged adjacent to each other.
    Type: Grant
    Filed: December 3, 2005
    Date of Patent: March 20, 2012
    Assignee: AB SKF
    Inventors: Bernd Stephan, Jesko-Henning Tanke
  • GUIDING AND SEALING UNIT, IN PARTICULAR FOR A ROD OF A MONO-TUBE SHOCK-ABSORBER AND ANNULAR SEALING ASSEMBLY THEREFORE
    Publication number: 20120063707
    Abstract: A guiding and sealing unit for a rod of a shock absorber, including a bushing, and a sealing assembly pressed into a cup-shaped seat on one end of the bushing facing the inside of the shock absorber body. The sealing assembly includes a sealing ring and an annular sealing lip that contacts the rod, a metallic reinforcing structure having a flange-shaped portion that abuts the end of the bushing and a sleeve-shaped portion. A reinforcing ring snappingly mounted on the sealing ring on a side opposite to the lip, engaged on the rod, and made of a low friction coefficient material that is more rigid than the material used to form the sealing ring and which axially extends in the seat flanking at least in part, the sleeve-like portion of the reinforcing structure.
    Type: Application
    Filed: August 4, 2011
    Publication date: March 15, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventor: Robert PASINO
  • SEAL FOR SEALING AN AXIAL SPACE
    Publication number: 20120051834
    Abstract: A seal is for sealing an axial space between first and second axially-spaced members, the first member having a radial surface and the second member having an outer circumferential surface. The seal includes an annular body having inner and outer circumferential surfaces and first and second axial ends, a radial sealing surface proximal to the first end to sealingly engage with the first member radial surface, and a circumferential sealing surface proximal to the second end to sealingly engage with the second member outer surface. At least a portion of the seal body extends circumferentially about and encloses the axial space. The seal may be incorporated in a joint assembly for a linkage having first and second links, the assembly including a shaft coupled with the first link and a boss coupled with the second link, receiving the shaft, and defining an axial space in which the seal is disposed.
    Type: Application
    Filed: August 31, 2011
    Publication date: March 1, 2012
    Applicant: SKF USA Inc.
    Inventors: Tadd McBride, Christopher Hughes
  • Freewheel bearing device with torque limiter
    Patent number: 8123013
    Abstract: The invention concerns a freewheel bearing device including an outer element and inner element arranged inside the outer element, and a free wheel provided with at least a wedging element, arranged between the inner element and the outer element to allow a free rotational movement in one direction between the outer element and the inner element and for transmission of a torque in the other direction between the outer element and the inner element, the free wheel including a ring provided with a cylindrical inner surface and a cylindrical outer surface, substantially aligned on a radial plane perpendicular to the axis of rotation of the device, and a torque limiting member adapted to limit the torque transmitted by the free wheel, the torque limiting member being arranged radially between said ring and the outer element or the inner element in contact with said ring and said element.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: February 28, 2012
    Assignee: SKF France
    Inventors: Frederic Ponson, Thierry Poulle, Virginie Hamada, Romuald Lescorail, Claude Caillault
  • Wheel monitoring device
    Patent number: 8125323
    Abstract: A wheel monitoring apparatus includes a measuring and evaluation unit designed to be fastened to the wheel in the region of at least one wheel nut or bolt of the wheel. The wheel monitoring apparatus includes at least one sensor for detecting a characteristic variable for a state of a wheel bearing and at least one sensor for detecting a tire pressure of a tire of the wheel.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: February 28, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Bernd Stephan, Jens Graf, Patrick Mayer
  • SEALED HUB-BEARING ASSEMBLY FOR AGRICULTURAL APPLICATIONS
    Publication number: 20120045155
    Abstract: A sealed hub-bearing assembly for agricultural applications includes a hub-bearing unit 10 with a flanged outer ring 11 and a pair of radially inner stationary rings 16, 17 tightly mounted side to side. A sealing device 20 is mounted on a side of the hub-bearing unit 10 opposite to the side of the flange 12 and includes a sealing gasket 32 which is arranged to slide against the outer ring 11 and it is mounted by snap-action in a circumferential groove 18 formed in the inner ring 17 located farthest from the side of the flange 12.
    Type: Application
    Filed: April 29, 2009
    Publication date: February 23, 2012
    Applicant: AKTIEBOLAGET SKF
    Inventors: Luca Morero, Fabio Picatto, Ove Lennart Andersson, Stephano Urso, Massimo Marivo, Carlo Maldera, Marco Panchetti, Andea Magnetto
  • Portable monitoring device
    Patent number: D657398
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: April 10, 2012
    Assignee: Aktiebolaget SKF
    Inventors: Bryan Leslie Calderwood, Gordon Stewart Miller, James Alexander Ward, Graham Peter Menzies