Temperature Compensation Patents (Class 384/905)
  • Patent number: 10330108
    Abstract: A fuel delivery pump for delivering fuel, having an electric motor and having a pump impeller that is driven by means of the electric motor, wherein the pump impeller is connected by means of a shaft to a rotor of the electric motor such that a rotational movement of the rotor is transmitted via the shaft to the pump impeller, wherein the shaft is mounted by means of an axial bearing in an axial direction and/or by means of a radial bearing in a radial direction relative to a pump stage in which the pump impeller is arranged, wherein an electrical insulation element is arranged between the axial bearing and the pump stage, and/or an electrical insulation element is arranged between the radial bearing and the pump stage.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: June 25, 2019
    Assignee: Continental Automotive GmbH
    Inventors: Marc Völker, Gabriel Simara Lima, Ralf Muehlhausen
  • Patent number: 8961028
    Abstract: A bearing assembly includes a hub element or housing element which has an accommodating bore for at least one rolling-element bearing, the rolling-element bearing being disposed with its outer ring in a press-fit arrangement in the accommodating bore, and the outer ring having at least one first axial region along at least one raceway of the outer ring and at least one second axial region extending outside the raceway. To ensure a proper fit of the bearing ring in the hub or housing element over a wide range of operating temperatures, the receiving bore and the outer circumference of the outer ring are configured such that at the ambient temperature the radial clamping force between accommodating bore and outer ring in the first region is smaller than in the second region.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: February 24, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Thilo Beck, Rico Dittmar
  • Patent number: 8844711
    Abstract: A chain wheel arrangement for chain drives of mining machines, with a chain wheel shaft, with a chain wheel, with bearing shells receiving bearings for the chain wheel shaft, with a chain wheel-side sliding ring seal and with a bearing-side sliding ring seal. In order to improve the service life of the chain wheel arrangement, at least one of the bearings, preferably that of the movable bearing system, is arranged in a bearing bush which is arranged between the bearing shell and outer bearing ring and received in the bearing shell in an axially displaceable manner. The additional bearing bush allows the necessary gap between the rotating parts and the non-co-rotating, bearing shell-side parts to remain substantially constant and to this extent to become independent of the bearing play of the respective bearings.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Global Mining Europe GmbH
    Inventor: Wolfgang Kruger
  • Patent number: 8678665
    Abstract: A bearing arrangement to reduce the effects of thermal expansion in a marine transmission includes a pinion gear thrust bearing, a clutch shaft thrust bearing, a shaft roller bearing and a thrust washer. The clutch shaft thrust bearing is retained on one end of a clutch shaft and the shaft roller bearing is retained on the other end of the clutch shaft. A pinion gear is rotatably retained on the clutch shaft. The pinion gear thrust bearing is retained on the pinion gear with a bearing retainer. The thrust washer is retained on the bearing retainer. An end of the clutch shaft thrust bearing rotates relative to the thrust washer and makes contact therewith. The length of thermal expansion in the transmission housing is limited to the distance between the opposing ends of the two thrust bearings.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: March 25, 2014
    Assignee: Twin Disc., Inc.
    Inventor: Andrew Clark
  • Patent number: 8591120
    Abstract: A rolling bearing which has at least one lash compensation element possessing temperature-dependent extendably arranged on one bearing ring of the rolling bearing. The lash compensation element is surrounded at least partially by an angular ring profile. The angular ring profile has at least one leg directed axially parallel to an axis of rotation of the angular contact roller bearing. The ring profile is retained by the leg by positive axial engagement for limited axial movement on the bearing ring such that the lash compensation element is supported by the ring profile by positive engagement so as to be radially immovable on the bearing ring while being guided for axial movement on the bearing ring.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 26, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Marion Jack Ince, Guihui Zhong
  • Patent number: 8556518
    Abstract: An example bearing support arrangement includes a support and a race of bearing assembly. A flange extends radially from the race. The flange and the support are configured to be held against a housing to secure the bearing assembly relative to the housing.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: October 15, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Mohammad Shahamat, Timothy R. Welch
  • Patent number: 8529136
    Abstract: A ball bearing having external surfaces coated with ceramic materials is provided. The raceways of the ball bearing may advantageously be formed of metal such as stainless steel. The ceramic coating acts as an insulator increasing the resistance of the ball bearing to heat within the ball bearing environment. The balls within the raceway of the ball bearing may advantageously be coated with a lubricant to decrease friction in the ball bearing because the insulating ceramic coating prevents the environmental heat from causing the degradation of the lubricant.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: September 10, 2013
    Assignee: Wafertech, LLC
    Inventors: Xiao-Jun Liu, Mark Chou
  • Patent number: 8256966
    Abstract: The invention is directed to a roller bearing arrangement comprising two rings arranged mutually concentrically and at least regionally inside each other, and comprising a gap between these rings, so that they are rotatable in opposite directions about an imaginary axis at the center of the rings and approximately perpendicular to the ring plane, wherein disposed in the region of a gap portion situated between the rings and surrounding the axis of rotation at an approximately constant radius is at least one raceway for at least one row of rollers, each having a rotationally symmetrical shape and rolling displacingly between the rings, each of which rollers, when the rings and the rollers are at the same temperature, has at least one point or region of contact with the raceway portions on each of the two rings, so that the radial and/or axial clearance between the two rings is equal to zero or at least is negligibly small; and comprising a mechanism for compensating for temperature-induced radial changes in th
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: September 4, 2012
    Assignee: IMO Momentenlager GmbH
    Inventor: Georg Hofmann
  • Patent number: 8047332
    Abstract: A drive gear includes a plurality of internal radial channels extending between the axial bore and the periphery of the gear, and an axial bore includes a lubricant distribution structure therein to provide lubrication where the teeth of the drive gear mesh with the teeth of a gear driven by the drive gear.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: November 1, 2011
    Assignee: Raytheon Company
    Inventors: Gordon O. Salmela, Joseph A. Creonte
  • Patent number: 7651276
    Abstract: In a bearing unit for a drive shaft mounted cantilevered in a housing by means of two rolling bearings and having a driving bevel gear wherein the drive shaft is mounted in the drive housing via a bearing bush and the bearing bush is axially supported at one end by a bearing bush support part and the rolling bearings are supported in the bearing bush spaced from the one end thereof so that, during heating, the bearing bush expands inwardly toward the driving bevel gear mounted on the shaft whereas the drive housing expands outwardly away from the driving bevel gear, the gear drive housing and the bearing bush consist of a light metal alloy and the bearing bush support part consists of an iron material.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: January 26, 2010
    Assignee: Daimler AG
    Inventors: Hartmut Nied, Wolfgang Oetken, Ulrich Scholz
  • Patent number: 7435006
    Abstract: A bearing in which the thickness of the bottom of at least one of the inner ring and the outer ring is 50% or more of the diameter of the balls. Further, the bearing includes an outer ring having an outer diameter of 65 mm or less and balls having a diameter of 4 mm or less and has a width dimension of 45% or less of the inner diameter dimension thereof wherein the pitch diameter of the balls is closer to the outer side of the bearing than to the center of the section of the bearing. The outer side of the outer raceway grooves is tapered, and the inner side of angularly arranged outer raceway grooves is positioned closer to the central axis of the bearing than to the outer side of the outer raceway grooves.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: October 14, 2008
    Assignee: NSK Ltd.
    Inventors: Toshihisa Ohata, Hiroshi Ishiguro
  • Patent number: 7377695
    Abstract: An x-ray target assembly is provided comprising a drive shaft and an outer shaft housing element. A primary integral duplex bearing assembly is positioned between the outer shaft housing element and the drive shaft and comprises a primary fixed outer race and a primary dual inner race comprising a first primary inner race element and a second primary race element. A plurality of primary ball elements are positioned therebetween. A secondary integral duplex bearing assembly is positioned between the outer shaft housing element and the drive shaft and comprises a secondary floating outer race comprising a single secondary race element. A secondary dual inner race is comprised of a first secondary inner race element and a second secondary race element. A plurality of secondary ball elements are positioned between the secondary floating outer race and the secondary dual inner race.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 27, 2008
    Assignee: General Electric Company
    Inventors: Liangheng Qiu, Thomas Dean Schaefer, Paul M. Ratzmann
  • Patent number: 7282006
    Abstract: A power transmission device includes a housing, a differential assembly having a case and a bearing assembly rotatably supporting the case within the housing. A preload is applied to the bearing assembly along a load path. A shim is positioned in the load path with the bearing assembly. The shim is constructed at least in part from a material having a predetermined coefficient of thermal expansion such that the shim is operable to compensate for different rates of thermal expansion in the components within the load path to maintain a desired bearing preload or a range of operating temperatures.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: October 16, 2007
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Paul H. Petruska, Benjamin J. Walker
  • Patent number: 7175560
    Abstract: A power transmission device includes a housing, a differential assembly having a case and a bearing assembly rotatably supporting the case within the housing. A preload is applied to the bearing assembly along a load path. A shim is positioned in the load path with the bearing assembly. The shim is constructed at least in part from a material having a predetermined coefficient of thermal expansion such that the shim is operable to compensate for different rates of thermal expansion in the components within the load path to maintain a desired bearing preload or a range of operating temperatures.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: February 13, 2007
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Paul H. Petruska, Benjamin J. Walker
  • Patent number: 7175350
    Abstract: A shaft rotates in a housing on two single row tapered roller bearings mounted in opposition such that the raceways of the one bearing taper downwardly toward the raceways of the other bearing. The metal from which the housing is formed has a higher coefficient of thermal expansion than the metal from which the shaft and bearings are formed. The bearings are set to preload to stabilize the axis of rotation. To prevent the cups (outer races) of the bearings from becoming loose as a consequence of differential thermal expansion between the housing and shaft, the cups are provided with beveled back faces which abut beveled shoulders at the ends of bearing seats in the housing. As the housing expands radially and perhaps eliminates radial interference fits between the cups and housing, the housing also expands axially and maintains the beveled shoulders of the bearing seats firmly abutted against the beveled back faces of the cups, so that the cups do not displace either axially or radially.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: February 13, 2007
    Assignee: The Timken Company
    Inventors: Mircea Gradu, John Feltman, Sharon E. Ross, Tim Schlernitzauer
  • Patent number: 7056027
    Abstract: A bearing for rotatably supporting a cylindrical shaft within a frame cylindrical support surface in which the shaft is subject to thermal expansion, the bearing being formed of a tubular member having opposed ends and having an axial passageway therethrough, the outer surface of the bearing member having an external circumferential rib adjacent each of the ends, each rib having an external diameter that permits the bearing member to be slideably positionable in the frame internal cylindrical support surface, the axial passageway being defined by a central bearing surface of internal diameter to rotatably receiving the shaft, the bearing surface having an axial length less than the spacing between said ribs, the bearing being deformable within elastic limits permitting the internal diameter of the bearing surface to expand to accept thermal expansion of the shaft.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: June 6, 2006
    Inventor: Gregory L. Puckett
  • Patent number: 7004007
    Abstract: A self-contained die cushion assembly for use in a stretch-forming process involving heated tooling. A lower plate is mounted below an upper plate that undergoes different thermal expansion than the lower plate. Guidance devices are mounted between the upper and lower plates and include a guide post, a bearing sleeve circumscribing the guide post, and a cylinder circumscribing the bearing sleeve. The guide post is mounted in fixed relation to the upper plate, and the cylinder is mounted in laterally translatable relation to the lower plate to accommodate lateral relative displacement between the upper and lower plates due to different thermal expansion thereof, thereby preventing binding of the guidance devices.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: February 28, 2006
    Assignee: General Motors Corporation
    Inventors: Gary A. Kruger, Mark G. Konopnicki, Richard Harry Hammar
  • Patent number: 7001075
    Abstract: A bearing hub for a gas turbine engine comprises an inner annular member defining a bearing chamber and an outer annular member extending around the inner annular member. Each annular member defines an aperture to receive a conduit which can extend to the bearing chamber. The outer annular member is configured to slidingly engage the conduit at the aperture in the outer annular member.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: February 21, 2006
    Assignee: Rolls-Royce plc
    Inventor: Ian M Bradshaw
  • Patent number: 6834999
    Abstract: The present invention relates to a fan apparatus for a chamber of a handler which prevents the breakage of a bearing housing by a guide recess and a key slidable to the guide recess along the axis varied due to a thermal stress generated in the axial direction of the fan apparatus according to a change in temperature of the fan apparatus mounted inside the chamber. The fan apparatus includes: a first housing having a first guide recess formed; a second housing contained in the first housing and slidable therein; a bearing being installed inside the second housing and supporting the shaft; a plurality of labyrinths being installed at both sides of the bearing and supporting the bearing; and a push cover covering the second housing inserted into the first housing.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: December 28, 2004
    Assignee: Mirae Corporation
    Inventor: Dong June Kim
  • Patent number: 6817774
    Abstract: Method and apparatus for automatically dynamically adjusting prestressed bearings of shaft are provided. The apparatus comprises a sleeve assembly having outer and inner sleeves sandwiched between the bearings. An inner diameter of outer sleeve is smaller than an outer diameter of inner sleeve. Hence, outer and inner sleeves are fitted together after cooling. Further, inner sleeve is compressed by the outer sleeve to extend axially. During rotation of shaft, the axial extension of inner sleeve is reduced because the radial expansion of outer sleeve is larger than that of inner sleeve due to an thermal expansion coefficient of outer sleeve larger than that of inner sleeve. This can reduce prestress of bearings without degrading a rigidity thereof.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: November 16, 2004
    Assignee: Industrial Technology Research Institute
    Inventors: Jinn-Fa Wu, Tsann-Huei Chang, Kuan-Wen Chen
  • Patent number: 6731456
    Abstract: A hub and shaft are provided which are mounted for relative rotation by providing two conical bearings spaced apart along the shaft, and a bearing seat facing each conical bearing. Fluid is maintained in the gap between each cone and the facing bearing seat, supporting the cone and seat for relative rotation. The outer surface of the bearing seat is insulated from the remainder of the motor by a thermal insulator which extends at least part way along the outer surface of the seats. This insulator is effective at keeping the bearings warm even in a relatively low temperature environment in which the motor may be used. The insulator may comprise a cylindrical ceramic or similar low thermal conductivity material extending at least part way along the axial distance outside of the bearing cones. Alternatively, an air space may be defined in the outer surface of the bearing seat, extending at least part way between the bearing cones.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: May 4, 2004
    Assignee: Seagate Technology LLC
    Inventors: Norbert Steven Parsoneault, Troy Michael Herndon, Robert Alan Nottingham, Jeffry Arnold LeBlanc, Alan Lydon Grantz
  • Publication number: 20040042697
    Abstract: The invention relates to pairs of sliding elements having one carbon-based sliding element.
    Type: Application
    Filed: August 15, 2003
    Publication date: March 4, 2004
    Inventors: Mathias Woydt, Jens Kleemann
  • Patent number: 6684482
    Abstract: An alternator assembly 10 having a pair of housing members 11, 12 which cooperatively contain a stator 24, rotor 18, and bearing 29. The housing member 12 includes an integrally formed bearing sleeve member 40 which receives the bearing 29 and allows the rotor 18 to rotate within the assembly 10.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: February 3, 2004
    Assignee: Visteon Global Tech., Inc.
    Inventors: Dave Linden, Jayeson Fougner, Kevin Roy Harpenau, Steven John Yockey
  • Patent number: 6599022
    Abstract: A bearing apparatus including inner and outer rings and balls interposed therebetween, the apparatus being characterized in that it comprises: a low expansion ring press fit around the outer periphery of the outer ring, wherein the low expansion ring is made of a material with lower factor of linear thermal expansion than the outer ring material.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: July 29, 2003
    Assignee: Minebea Kabushiki-Kaisha
    Inventor: Rikuro Obara
  • Patent number: 6575634
    Abstract: A hydrodynamic bearing is provided comprising a shaft having a pair of spaced apart conical bearings supporting a surrounding sleeve for rotations. The sleeve comprises a single piece rather than the two-piece design separated by a rubber expansion joint of the prior art. Instead upper and lower slots are cut into the sleeve, and the rings are pressed or otherwise tightly fitted into each slot. The single piece sleeve which also incorporates the bearing seats for the conical bearings on the shaft, is made of aluminum, while each ring is made of steel (as is the shaft and bearing cones). As the temperature rises at which the hydrodynamic bearing is operated, the sleeve expands axially putting the bearing seat closer to the cone, effectively compensating for the thinning of the fluid which supports the bearing seat and sleeve for rotation relative to the cone. Meanwhile, the steel ring, being of the same material as the shaft, prevents the aluminum sleeve from expanding radially away from the cone.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: June 10, 2003
    Assignee: Seagate Technology LLC
    Inventor: Robert A. Nottingham
  • Patent number: 6513988
    Abstract: A bearing device for a threaded spindle has a bearing housing with at least one receptacle configured to receive a bearing part of the threaded spindle. The at least one receptacle is a clamping bushing securing the bearing part by electromechanical elements or fluid-operated elements. The clamping bushing has a wall that is elastically deformable by a pressure medium. The wall and the bearing housing define an annular chamber configured to receive the pressure medium. A control unit is provided to control the pressure of the pressure medium and thus the clamping action of the clamping bushing.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: February 4, 2003
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Patent number: 6508619
    Abstract: An expansion turbine for low-temperature applications containing a turbine stage into which a cold gas is admitted. A turbine rotor is mounted on a shaft. Also provided is a roller support for the shaft being lubricated with a minimum amount of oil or grease. The roller support contains a roller bearing located adjacent to the turbine stage. The roller bearing is comprised of an inner bearing ring, rollers, and an outer bearing ring supported on the side of the housing. An insulating bush made of ceramic engineering material is arranged between the inner bearing ring and the shaft. The bush thermally separates the inner bearing ring from the cold shaft.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: January 21, 2003
    Assignee: Atlas Copco Energas GmbH
    Inventor: Werner Bosen
  • Publication number: 20020186909
    Abstract: Method and apparatus for automatically dynamically adjusting prestressed bearings of shaft are provided. The apparatus comprises a sleeve assembly having outer and inner sleeves sandwiched between the bearings. An inner diameter of outer sleeve is smaller than an outer diameter of inner sleeve. Hence, outer and inner sleeves are fitted together after cooling. Further, inner sleeve is compressed by the outer sleeve to extend axially. During rotation of shaft, the axial extension of inner sleeve is reduced because the radial expansion of outer sleeve is larger than that of inner sleeve due to an thermal expansion coefficient of outer sleeve larger than that of inner sleeve. This can reduce prestress of bearings without degrading a rigidity thereof.
    Type: Application
    Filed: December 27, 2001
    Publication date: December 12, 2002
    Inventors: Jinn-Fa Wu, Tsann-Huei Chang, Kuan-Wen Chen
  • Patent number: 6471409
    Abstract: A bearing device includes a pair of bearings. One of the bearings is exposed to a higher temperature condition than the other. Each of the bearings has an outer ring, an inner ring, a plurality of rolling members disposed in a space between the outer ring and the inner ring and a pair of sealing members fixed to the outer ring. Each of the sealing members has an elastic lip in contact with an outer surface of the inner ring, and the lip of the bearing exposed to a higher temperature condition is made of a material that is more heat-resistant than the lip of the other sealing member.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: October 29, 2002
    Assignee: Denso Corporation
    Inventor: Shigenobu Nakamura
  • Patent number: 6467959
    Abstract: An EGR valve having a self-compensating bearing assembly for use with a valve member having a shaft reciprocable within a valve body, includes a rigid bearing member for providing radial support and axial guidance to the valve shaft as the shaft reciprocates in the valve body; and a pliant annulus supporting the bearing member, where the pliant annulus has a density and thickness sufficient to accommodate distortion of the rigid bearing member in response to changes in temperature without interfering with shaft actuation.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: October 22, 2002
    Assignee: Delphi Technologies, Inc.
    Inventor: Raul Armando Bircann
  • Patent number: 6416228
    Abstract: A rolling-contact bearing for a shaft journal wherein the outside diameter of the shaft journal is thermally insulated relative to the shaft through which a heat transfer medium flows. The bore of the inner race on the shaft journal is provided with a ceramic layer predominantly of zirconium oxide and a smaller among of yttrium oxide to reduce the heat transfer from the shaft journal to the rolling-contact bearing. The inner race also has lateral surfaces toward the elements securing the bearing on the shaft journal. Those lateral surfaces may be provided with a ceramic layer as well.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: July 9, 2002
    Assignee: FAG OEM und Handel AG
    Inventors: Karl Müller, Gudrun Martin
  • Patent number: 6398418
    Abstract: A shaft having thermal expansion, thermal pre-load yielding and dynamic pre-load adjusting systems. The shaft is made by the zero expansion or very low expansion materials. The shaft has two bearing assemblies. Each bearing assembly has two parallel bearings. A partition ring set is disposed between them. The partition ring set is made of multiple low and negative thermal expansion materials. It includes an inner partition ring and an outer partition ring. The inner partition ring is tightly contacting with corresponding sides of inner annular seats of the bearing. The outer partition ring is disposed outside of the inner partition ring without any contact. And, the outer partition ring is tightly contacting with corresponding sides of outer annular seats of the bearings.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: June 4, 2002
    Assignee: Industrial Technology Research Institute
    Inventors: Tsann-Huei Chang, Jih-Jong Hsu, Shang-Liang Chen
  • Patent number: 6390683
    Abstract: A heat insulation sleeve and a bearing device using the heat insulation sleeve capable of reducing generation of periodical or sudden noises generated in the periphery of a fixing device are described. A flange of the heat insulation sleeve does not break to be used for a fixing roller incorporated in an energy-saving type electrophotographic apparatus such as a laser beam printer or the like which is heated and cooled frequently at short intervals. Both ends of the slit overlap each other in an axial direction of the heat insulation sleeve. And the heat insulation sleeve has a projection formed at a peripheral end opposite to a flange-disposed side. The heat insulation sleeve is press-fitted on an inner ring of a rolling bearing.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: May 21, 2002
    Assignee: NTN Corporation
    Inventors: Kazuo Hirose, Satoru Fukuzawa
  • Patent number: 6382837
    Abstract: A device and a method for the holding of a drum in a printer or copier. A star-shaped spring intercepting the differing longitudinal expansions of photoconductor drum and a shaft is arranged between an outer ring bearing the drum and an inner ring.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: May 7, 2002
    Assignee: Oce Printing Systems GmbH
    Inventors: Otto Olbrich, Peter Thiemannn
  • Patent number: 6307292
    Abstract: A galvanometer unit comprises a limited-rotation motor, which has axial symmetry of the major motor components including axial placement of the bearings, stator drive coils, and stator back iron with respect to the magnetic center of the rotor, and which employs a cylindrical magnet having significantly uniform properties along its length. The galvanometer employs independently “hard” and “soft” preloaded bearings, which simultaneously minimize axial displacement and account for thermal expansion of the rotor assembly and which improve the overall efficiency of the galvanometer and extend the service life of the bearings.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: October 23, 2001
    Assignee: GSI Lumonics, Inc.
    Inventor: David C. Brown
  • Patent number: 6293704
    Abstract: A shaft rotates within a housing on a double row tapered roller bearing and remains extremely stable at all temperatures, even though the housing is formed from a light weight metal having a significantly greater coefficient of thermal expansion than the metal of the bearing. To this end, the housing contains a bore defined by a cylindrical surface and a conical surface which flares away from the cylindrical surface and opens out of one face of the housing. The bearing has two cones which surround the shaft, a unitary or double cup which fits into the bore of the housing, and tapered rollers arranged in two rows between the cones and cup. The double cup on its exterior has a cylindrical surface which fits into the cylindrical surface of the housing bore and a flange provided with a beveled face which is against the conical surface of the housing bore.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: September 25, 2001
    Assignee: The Timken Company
    Inventor: Mircea Gradu
  • Patent number: 6273614
    Abstract: A rolling-contact bearing having a termal compensation insert. The bearing includes a first ring with a first ball race, a second ring with the second ball race, and a row of rolling bodies which obliquely contact the ball races. A compensating insert is in stop contact on one of the rings. One of the sheet metal rings has a supporting surface which is extended by a radial stop extension for blocking the insert axially and radially.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: August 14, 2001
    Assignee: SNR Roulements
    Inventor: Christophe Nicot
  • Patent number: 6250815
    Abstract: A vehicle transmission is provided having a housing that includes a support with an opening. The transmission also has a shaft with an axis of rotation and an end portion disposed within the support opening. A floating bearing assembly is arranged between the housing and the end portion so that the bearing assembly supports the end portion within the support opening thereby permitting the shaft to rotate about it axis within the support opening. The bearing assembly is movable along the axis of rotation relative to the housing to permit the shaft to move along the axis of rotation. An expansion member is arranged between the end portion and the housing to expand and contract with changing temperatures and maintain a desired end play tolerance between the end portion and the housing.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: June 26, 2001
    Assignee: ZF Meritor, LLC
    Inventors: Kenneth T. Picone, Teisuolis C. Mikulskis, Peggy M. Garrett
  • Patent number: 6210043
    Abstract: A support assembly comprising an elongated shaft, a bearing assembly at opposite terminal ends of said shaft paralleled in a pillow block, support means for each of said pillow blocks and means mounting one of said bearing assemblies for adjustable axial movement relative to said pillow block thereby to compensate for any changes in the support structure in an axial direction and a method for supporting a load bearing member on spaced support structures comprising the steps of mounting the lower half of a pillow block on each of the spaced support structures, positioning a shaft having bearings journaled at opposite ends so that the bearings engage in the lower half of the pillow block, assembling the cap section of each pillow block, fixing the bearing in one of the pillow blocks against displacement in an axial directions relative to the pillow block, and displacing the bearing in the other pillow block axially to position it generally centrally in the pillow block with a predetermined clearance between the
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: April 3, 2001
    Assignee: SKF USA, Inc.
    Inventor: William H. Detweiler
  • Patent number: 6206572
    Abstract: It is an object of the invention to provide a bearing device in which the bearing performance is not lowered even when the temperature is changed. In order to attain the object, the bearing device has a shaft and a sleeve. The shaft is made of stainless alloyed steel and has dynamic pressure generating grooves of a herringbone-like shape. The sleeve consists of the body made of a copper alloy, and an electroless nickel plated layer which covers the whole surface of the body. The electroless nickel plated layer has a coefficient of thermal expansion which is smaller than that of the body made of a copper alloy. The coefficient of thermal expansion of the shaft made of stainless alloyed steel is smaller than that of the body of the sleeve made of a copper alloy. When the temperature is raised, the electroless nickel plated layer suppresses the amount of thermal expansion of the body.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: March 27, 2001
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Yasuhiro Kobayashi, Takeshi Takahashi, Yasuo Takamura, Shinji Matsue
  • Patent number: 6190048
    Abstract: A compliant foil fluid film radial bearing having a contoured profile bearing rotor to provide for the greater thermal expansion of the hot end of the compliant foil fluid film radial bearing at operating temperature. The rotor may have a uniform taper over its entire length, may be tapered for a portion of its length, or the taper may vary over the entire length of the bearing rotor.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: February 20, 2001
    Assignee: Capstone Turbine Corporation
    Inventor: Dennis H. Weissert
  • Patent number: 6158895
    Abstract: Two angular contact ball bearings (5, 7) are arranged in a backside combination manner for supporting a machine tool spindle (3), a spindle head body (1) serves as a bearing case for holding the angular bearings, an inner collar (9) is disposed between inner races (5i, 7i) of the angular bearings, an outer collar (13) is disposed between outer races (5o, 7o) of the angular bearings, the outer collar is set to be longer in an axial direction than the inner collar to provide preloads to the angular bearings, the outer collar is made of a material having a smaller thermal expansion coefficient than the bearing case, the machine tool spindle and the inner collar.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: December 12, 2000
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventor: Takao Date
  • Patent number: 6135641
    Abstract: Disclosed is a bearing assembly with thermal compensation. The bearing assembly includes a bearing mechanism defined by a pair of races and a plurality of bearing elements. The races are manufactured from a material having a coefficient of thermal expansion that is substantially different than the coefficient of thermal expansion of the material from which the bearing elements are manufactured. A thermal compensation mechanism of the bearing assembly is contiguous with the races. The thermal compensation mechanism permits movement of the races relative to the bearing elements in a direction parallel the rotational axis of the bearing mechanism as a result of the effect of temperature variations on the materials of the races and bearing elements.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: October 24, 2000
    Assignee: Honeywell International Inc.
    Inventor: Dennis W. Smith
  • Patent number: 6120186
    Abstract: The invention relates to a lighter bearing assembly, in which the bearing includes an outer sleeve and an inner sleeve that rotate in relation to each other, the outer sleeve being set in a bearing block and the inner sleeve being set on a shaft, and one of the sleeves being arranged for axial movement relative to its support surface, and a pocket being arranged in the movement surface thus formed, to which a lubrication channel extends, to facilitate axial movement, such as that due to thermal expansion, the pocket being formed by a sealed area that delimits part of the movement surface.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: September 19, 2000
    Assignee: Valmet Corporation
    Inventor: Jorma Snellman
  • Patent number: 6065877
    Abstract: A bimetallic part is formed from metals or comprises metals with different thermal expansion coefficients. A first element defines the part and defines one surface of the bearing gap and has a first coefficient of expansion and a second element is wholly or partially inserted into and constrained within the first element and having a different coefficient of thermal expansion so that as the temperature changes, the stress created by the differential expansion of the two elements will cause the overall part to deform elastically as a function of temperature. This deformation will cause the gap, the elements being properly selected, to narrow as temperature rises (and viscosity falls) and to widen as temperature falls (and viscosity rises).
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: May 23, 2000
    Assignee: Seagate Technology, Inc.
    Inventors: Hans Leuthold, Alan Lyndon Grantz, Matt L. Shumway, Norbert S. Parsoneault, Etoli Wolff, Michael D. Kennedy, Samnathan Murthy, Raquib U. Khan, Mohamed M. Rahman, Wesley R. Clark
  • Patent number: 5941645
    Abstract: A bearing assembly comprises a piston mounted within and capable of reciprocating with respect to a fixed bearing shell. The bearing shell is provided with openings for the supply of a bearing medium, such as compressed air, into a clearance between the piston and the bearing shell. The bearing shell is tapered circumferentially which renders the bearing shell flexible. As the diameter of the piston increases due to thermal expansion, the diameter of the bearing shell changes automatically to maintain the clearance therebetween.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: August 24, 1999
    Inventor: Peter F Hufton
  • Patent number: 5857782
    Abstract: A two-piece annular bearing ring seat with an annular concave spherical inside surface is adapted to slidably receive a spherical outer surface of a bearing ring. An annular strap having a coefficient of thermal expansion higher than the coefficient of thermal expansion of a bearing housing holds the bearing ring seat and annular strap together as a subassembly. The subassembly can be press fit into the housing to provide a housed self-aligning bearing.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: January 12, 1999
    Assignee: The Torrington Company
    Inventor: Walter P. Waskiewicz
  • Patent number: 5843282
    Abstract: The invention is directed to an apparatus to produce layers of material, such as paper, carton or cardboard, under use of at least one roll that can be heated in a controlled manner, in particular a dryer cylinder, with tubing attached to the end of the roll that supplies the energy necessary to heat up the roll. Bearings at both ends of the roll are mounted to a seating structure. One of the bearings is a freely carrying bearing and the steam supply is rigidly attached to the seating structure.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: December 1, 1998
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Anton Schmitt, Thomas Mack
  • Patent number: 5803611
    Abstract: A marine bearing assembly for a propeller shaft suitable for a vessel which travels in intensely cold seawater where a conventional bearing, as a result of its contraction, would seize the shaft and prevent it from rotating. The assembly includes a cylindrical body having an axial bore therein to receive the rotating shaft, the body being formed of UHMW polyethylene having a low coefficient of friction and a high coefficient of thermal contraction. To complete the assembly, the body is exposed to a temperature below the freezing point of water to cause it to contract. The contracted body is then press-fitted into a sleeve whose internal diameter matches the contracted diameter of the body, whereby at higher temperatures the body seeks to expand, but being confined within the sleeve it is held under compression.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: September 8, 1998
    Inventors: John R. Newton, Jeffrey W. Strong
  • Patent number: 5785431
    Abstract: A method and apparatus for obtaining temperature-independent mounting of a shaft made of a first material having a first coefficient of thermal expansion, in a bearing which interacts with the shaft and which is made of a second material having a second coefficient of thermal expansion, the first coefficient of thermal expansion having a higher value than the second coefficient of thermal expansion, includes arranging on the shaft made of the first material having the first, higher, coefficient of thermal expansion, an outer shell to surround at least the greater part of the shaft's circumferential surface and to be at least partly located outside the area in which the bearing is supported. The outer shell is made of a third material having a third coefficient of thermal expansion which has a lower value than the second coefficient of thermal expansion.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: July 28, 1998
    Assignee: Bofors AB
    Inventors: Anders Nilsson, Stefan Olsson