Patents Assigned to SKF
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Patent number: 6796713Abstract: The invention concerns an instrumented antifriction bearing device provided with a non-rotating part comprising a non-rotating ring (2) and sensing means (11), a rotating part comprising a rotating ring (4) and coding means (16), and at least a row of rolling elements (6) arranged between the two raceways (3, 5) of the non-rotating (2) and the rotating (4) rings, the sensing means (11) being fixed in a groove (10) of said non-rotating ring (2) arranged proximate to a radial lateral surface (2a) of the non-rotating ring (2). The non-rotating part further comprises sealing means (21) arranged axially between the sensing means (11) and the rolling elements (6) substantially at the groove (10), the sealing means (21) being separate from the sensing means (11).Type: GrantFiled: June 25, 2003Date of Patent: September 28, 2004Assignee: SKF FranceInventor: Franck Landrieve
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Publication number: 20040184686Abstract: A guide rail for a linear bearing has at least one rail element with a guideway for rolling bodies. The rail element is connected to a plastic body or borders the plastic body, with the plastic body forming the base body of the guide rail. To increase the precision of the guide rail, especially when used in an environment involving a wide temperature range, the rail element is connected to a metallic support frame which is surrounded at least partially by the material of the plastic body.Type: ApplicationFiled: March 9, 2004Publication date: September 23, 2004Applicant: AB SKFInventors: Uwe Mayer, Ludwig Edelmann, Henryk Velde, Anita Gransow
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Publication number: 20040180255Abstract: A module for a fuel cell arrangement having several stacked plates. At least two of the plates have a common seal element of polymer material which is injected onto the plates and by which the plates are at least partially joined to one another. The plates can be provided with openings into which the seal element extends. The plates can be configured so that a cavity is defined between the plates, with the openings communicating with the cavity. The seal element can also have different cross-sectional configurations.Type: ApplicationFiled: October 29, 2003Publication date: September 16, 2004Applicant: AB SKFInventors: Karl-Heinz Maus, Werner Heinl, Hans-Joachim vom Stein
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Patent number: 6792360Abstract: Systems and methods for identifying the presence of a defect in vibrating machinery. An exemplary method comprises analysis of frequency spectrum vibration data of the machine. The method comprises deriving a harmonic activity index based on estimates of the energy associated with the frequency spectrum and the energy associated with the defect's harmonic series. The method may comprise deriving a value K by estimating a value M indicative of the energy of the defect's harmonic series and dividing M by the number of spectral lines corresponding to the defect's harmonic series. The method may further comprise deriving a value R by estimating a value Q indicative of the energy in the frequency spectrum data and dividing Q by the number of spectral lines of the frequency spectrum data. The method further comprises deriving the harmonic activity index based on the estimated K and R. Related systems for executing the methods are also disclosed.Type: GrantFiled: December 4, 2002Date of Patent: September 14, 2004Assignee: SKF Condition Monitoring, Inc.Inventors: Adrianus J. Smulders, Jim J. Wei, Johannes I. Boerhout
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Patent number: 6786644Abstract: Sealing device (1) for a rolling bearing (2) including: an inner race (5), which is axially blocked by a blocking element (4) suitable for being arranged in contact with a reference element (6); a distance ring (8) which is made of plastic material and which is interposed between the blocking element (4) and the reference element (6); a snap fastening element (9) which is integral to the distance ring (8) in order to fasten the distance ring (8) itself to the blocking element (4); and an external covering (10) made of rubber material and arranged outside the snap fastening element (9) in order to guarantee at least one static seal between the inner race (5) and the blocking means (4) and between the blocking means (4) and the reference element (6).Type: GrantFiled: September 4, 2002Date of Patent: September 7, 2004Assignee: SKF Industrie S.P.A.Inventors: Angelo Vignotto, Claudio Savarese
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Patent number: 6789025Abstract: The condition of a machine is monitored with cyclic time averaging, a technique of allocating vibration energy to particular sources in a complex signal. The cyclic time averaging method is directed at processing time-domain vibration data of the machine to produce an averaged time waveform over a selected cyclic time period. Utilizing cyclic time averaging, the systems and methods analyze machine vibration signals to detect and evaluate specific sources of enemy contribution to the vibration energy of the machine. It is not necessary to employ a triggering signal to obtain the averaged time waveform.Type: GrantFiled: December 4, 2002Date of Patent: September 7, 2004Assignee: SKF Condition Monitoring, Inc.Inventor: Johannes I. Boerhout
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Patent number: 6776420Abstract: Sealing device (1) for a rolling contact bearing (2) presenting an annular sealing lining (5), a protective shield (6) for the lining (5) which is mounted on the outside of the lining (5) itself, and an encoder (15) which is integral to the shield (6) and which is protected by a covering element (16) arranged opposite the shield (6) in relation to the encoder (15).Type: GrantFiled: June 12, 2002Date of Patent: August 17, 2004Assignee: SKF Industrie S.p.A.Inventors: Angelo Vignotto, Pierangelo Cherio
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Patent number: 6763918Abstract: A screw actuator comprises a housing (1), a nut (A) and a screw (16) one of which is axially fixed with respect to the housing and the other of which is axially displaceable with respect to the housing for moving an actuating head, as well as a motor (2) which comprises a stator (6) connected to the housing, and a rotor (7). The rotor (7) of the motor is supported rotatably on a sleeve (8), said sleeve has an inwardly directed flange (21), which carries an excentric hub (23). The excentric hub (23) rotatably supports a gear wheel (24) through bearing (30), the outer teeth of which gear wheel (24) engage the inwardly directed teeth of the ring gear (25). The ring gear (25) is driving screw (16) which is rotatably supported in the housing (1). The nut (17) of the screw mechanism (4) is slidably, but not rotatably with respect to the housing.Type: GrantFiled: October 12, 2001Date of Patent: July 20, 2004Assignee: SKF Engineering & Research Centre B.V.Inventors: Hendrikus Jan Kapaan, Jacobus Zwarts, Simon Jan Broersen
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Publication number: 20040131296Abstract: A cylindrical roller bearing includes an outer bearing ring, an inner bearing ring and cylindrical rollers located between the outer and inner bearing rings. One of the rings has side rims forming an axial stop for the cylindrical rollers. The bearing ring on which the side rims are not provided is formed with at least one groove outside the axial extension of the cylindrical rollers. A ring of spring-elastic material is positioned in the groove to form an axial stop for the cylindrical rollers. The periphery of the ring has no interruptions. To improve the running behavior of the cylindrical roller bearing, the ring possesses a V-shaped cross-section with two legs.Type: ApplicationFiled: October 7, 2003Publication date: July 8, 2004Applicant: AB SKFInventors: Hans-Jurgen Friedrich, Bernhard Groschek, Torbjorn Hedman, Rut Heemskerk, Jurgen Sturzengerger, Alfred Weidinger
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Method for simultaneous machining and measuring parameters of a surface being subjected to machining
Publication number: 20040133299Abstract: A method for establishing different parameters of a surface of a work piece during machining of the surface using a spindle supporting a tool and displacement sensors for measuring displacement to which the spindle is subjected during machining. The method involves machining work pieces with different back off times to create sets of sensor signals representing spindle deflections. The machined work pieces are measured and then the stored sensor signals are compared with the measurement results of the same work pieces. Transfer constants are calculated representing the influence of the total deflection of the machine stiffness on the sensor signals. Displacement sensor signals obtained upon machining subsequent work pieces are processed with the transfer constants to give a series of sensor signals representing the true total deflection of the loaded and running machine stiffness chain to permit calculation of different parameters of the subsequently machined work pieces.Type: ApplicationFiled: October 6, 2003Publication date: July 8, 2004Applicant: Aktiebolaget SKFInventor: Bo Goransson -
Patent number: 6758531Abstract: A hubcap for a wheel hub. The hub is threaded and preferably includes several notches in its otherwise smooth radially outer end face. The hubcap has an open end terminating in a threaded end portion, a closed end and a discontinuous radial flange between the ends. One or more latching tabs fit into the discontinuities in the flange, and each tab contains a projection which fits into the notch. The tab can be manually lifted to disengage the tab from the notch, but the hubcap cannot otherwise be unscrewed.Type: GrantFiled: May 10, 2003Date of Patent: July 6, 2004Assignee: SKF USA Inc.Inventor: Morgan Bullard
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Publication number: 20040124044Abstract: Braked rolling bearing device of the kind for a control wheel, comprising an outer part and an inner part, one being able to rotate with respect to the other, which does not rotate, via at least one row of rolling elements arranged between the rotating and non-rotating parts, the device further comprising an element for detecting rotation parameters and an element for braking the rotating part. The braking element comprises at least one component equipped with flexible tabs bearing against an annular friction member.Type: ApplicationFiled: December 16, 2003Publication date: July 1, 2004Applicant: AKTIEBOLAGET SKFInventor: Franck Landrieve
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Patent number: 6739674Abstract: For the purpose of facilitating correct fitting of a motor vehicle wheel onto a hub (10) which froms a central axial tubular projection (11) for insertion into a central wheel hole (30), a hub assembly includes an annular cylindrical element (20) to be fitted on the projection (11) and having a plurality of circumferentially spaced resilient portions (21) capable of exerting force in radially outward directions on the wheel hole to support the wheel resiliently in an essentially centered manner relative to the hub.Type: GrantFiled: November 8, 2002Date of Patent: May 25, 2004Assignee: SKF Industrie S.p.A.Inventors: Angelo Vignotto, Carlo Maldera
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Patent number: 6739436Abstract: A screw actuator (4) comprises a housing (1), a nut (5) and a screw (6) one of which is axially fixed with respect to the housing and the other of which is axially displaceable with respect to the housing for moving an head (21), as well as a motor (7) which comprises a stator (8) connected to the housing, and a rotor (9) which is drivingly connected to a rotatable part (6) of the screw actuator, the housing having a bore (10) accommodating at least the nut and/or screw, an axially fixed part of said nut or screw being supported with respect to a radial support abutment (11) which extends inwardly in the bore. The rotor of the motor is supported rotatably on a sleeve (13), said sleeve engaging the fixed part and extending away from the brake pad, said sleeve having a radially outwardly extending sleeve flange (14) which is interposed between said support abutment, and the axially fixed part.Type: GrantFiled: May 16, 2002Date of Patent: May 25, 2004Assignee: SKF Engineering and Research Centre B.V.Inventors: Hendrikus Jan Kapaan, Emmanuel Jacques Eyraud, Alexander Jan Carel Vries, Jacobus Zwarts, Lucia Puppione
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Patent number: 6736027Abstract: An attachment device for a bore-provided machine member on a cylindrical shaft. A two-part sleeve is arranged in an annular space between the shaft and the machine member to provide a clamping force between the machine member and the shaft. The sleeve parts have mating cooperating taper surfaces that face each other so that upon mutual displacement of the sleeve parts the overall radial size of the sleeve parts changes. A first ring member is arranged about the shaft and forms a stop for one of the sleeve parts and a supporting device is adapted to move the machine member with respect to the shaft to cause mutual displacement of the sleeve parts. A second ring member positioned between the two-part sleeve and the machine member has a tapering bore, a tapering outer surface, and an inwardly projecting abutment for a second one of the sleeve parts.Type: GrantFiled: April 23, 2002Date of Patent: May 18, 2004Assignee: Aktiebolaget SKFInventors: Sture Östling, Uno Axelsson
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Patent number: 6735868Abstract: A method of improving the performance and service life of a new bearing component, the component having at least one dynamic frictional surface the method includes subjecting the at least one dynamic frictional surface to a surface finishing operation thereby providing the surface with a surface roughness value RA of approximately 18-80 &mgr;in, preferably greater than 24 &mgr;in, and most preferably 30-36 &mgr;in. The method is particularly advantageous when applied to bearing components utilized in high-load, low rpm applications.Type: GrantFiled: September 7, 2001Date of Patent: May 18, 2004Assignee: Aktiebolaget SKFInventors: Michael D. Loose, Daniel J. Donnelly, Clarence M. Clabaugh
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Publication number: 20040086211Abstract: Bearing/hub group (1) with a sensor (8) for vehicle wheels, the group (1) presenting at least one rolling race which can revolve around a rotation axis A: a fixed rolling race (4) which is arranged outside the revolving rolling race (3) in a position which is coaxial to the revolving rolling race (3) itself and which is provided with a support flange (7) which projects towards the outside; and a sensor (8) which is mounted on the fixed revolving race (4) being made of different materials, and being connected to each other by an interface element (9) which is integral with the flange (7), and by two axial blocking elements (10) which are integral with the fixed rolling race (4) and which abut the interface element (9).Type: ApplicationFiled: June 19, 2003Publication date: May 6, 2004Applicant: SKF INDUSTRIE S.P.AInventors: Andreas Ruetter, Francesco Savarese
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Patent number: 6729626Abstract: Static sealing element (1) for a rolling bearing (2) which is mounted on a cylindrical element (3) which presents a blocking moulding (4) which is positioned against an inner race (5) of the rolling bearing (2) itself and which is suitable for being arranged in contact with a shoulder (6) the sealing element (1) presenting a support (8) which is associated with the inner race (5) of the rolling bearing (2), and a sealing lip (9), which forms an integral part of the support (8) and which presents, in turn, a substantially conical end portion (17), which axially projects in relation to the blocking moulding (4) and which radially forks opposite the blocking moulding (4) itself.Type: GrantFiled: April 9, 2002Date of Patent: May 4, 2004Assignee: SKF In{acute over (d)}ustrie S.p.A.Inventors: Andreas Ruetter, Angelo Vignotto, Claudio Savarese
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Publication number: 20040080113Abstract: The present invention refers to a seal arrangement for sealing off a slot between first and second mutually movable bodies, such as the rings of a bearing. The seal comprises a first and a second member, the first member being arranged on the first body and the second member being arranged on the second body, whereby a labyrinth-shaped slit is formed between the first and the second members. The slit being filled with a semi-solid material having lubricating properties so that, upon rotation of one of the members, the material will slide along one of the members thereby forming a very thin labyrinth between the member and the material, which labyrinth substantially prevents passage of air, moisture and dirt.Type: ApplicationFiled: July 1, 2003Publication date: April 29, 2004Applicant: Aktiebolaget SKFInventors: Hans Linden, Folke Ostling
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Publication number: 20040074317Abstract: In a hub-bearing assembly for the wheel of a motor vehicle, the hub (1) forms integrally or is fixedly secured to a radial flange (7) fixable to a wheel (8). Associated with the assembly is a measuring device (14) mounted to a non-rotating part (12) of the vehicle and operatively facing a radial surface (13) integral with the flange (7). The measuring device (14) detects in real time variations of the axial position of the surface (13) caused by elastic deformation of the flange (7) provoked by forces transmitted from the wheel (8) to the hub flange (7).Type: ApplicationFiled: July 14, 2003Publication date: April 22, 2004Applicant: SKF Industrie S.p.A.Inventors: Giuseppe Colombo, Domenico Bosco, Carlo Maldera, Fulvio Nicastri