Hydrodynamic Sealing Feature Patents (Class 277/559)
  • Patent number: 10385976
    Abstract: A seal assembly for sealing a shaft configured to rotate in a main direction, the seal assembly including a stiffener and at least one elastomer seal member connected to the stiffener, the elastomer seal member including a seal region having a seal section configured to seal against a shaft and seal a to-be-sealed space, the seal section including a first screw thread web structure configured to pump a leakage fluid toward the to-be-sealed space when the shaft rotates in the main direction, a second annular, circumferentially extending web structure configured to sealingly abut on the shaft at least when the shaft is not rotating, and a third annular, circumferentially extending web structure configured to sealingly abut on the shaft at least when the shaft is not rotating, wherein the second web structure is axially spaced from the third web structure.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: August 20, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Juergen Kurth, Christoph Passow
  • Patent number: 10330203
    Abstract: A sealing assembly includes a first machine component having a seal groove defined by radially oriented jacket support and energizer positioning walls and an energizer compressing wall that faces axially toward a second machine component. A seal located within the seal groove has an energizer element and a telescoping jacket. The jacket has a first leg portion having a jacket sealing surface facing toward the second machine component and an energizer contacting wall facing toward the energizer element. The energizer element is compressed between the energizer contacting and energizer compressing walls and loads the jacket sealing surface against the second machine component. A jacket second leg portion extends generally axially and has an energizer supporting wall facing toward the energizer element and a supported wall facing radially and adjoining the jacket support wall. The second leg portion is interposed between the energizer element and the jacket support wall.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: June 25, 2019
    Assignee: KALSI ENGINEERING INC.
    Inventor: Lannie Laroy Dietle
  • Patent number: 10247308
    Abstract: A sealing device includes an annular seal portion formed of an elastic material. On an inner peripheral surface of the seal portion, a main lip is formed so as to be in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface is formed so as to gradually enlarge in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a plurality of annular projections are formed along an axial direction so as to be in slidable contact with the outer peripheral surface of the rotary shaft in a state where the main lip is in slidable contact with the outer peripheral surface of the rotary shaft.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: April 2, 2019
    Assignees: Koyo Sealing Techno Co., Ltd., Nabtesco Corporation
    Inventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
  • Patent number: 10228059
    Abstract: The purpose of the present invention is to provide a sealing device which has forward and reverse screw threads exhibiting a fluid-pumping action provided on a sliding portion of a seal lip, such that the pumping action is less susceptible to deterioration even with increasing wear on the screw threads and such that leakage of droplets from the screw threads is minimized. To achieve this, the forward and reverse screw threads which exhibit a pumping action on sealing fluid are arranged in a circle on the air-side lateral surface of the sliding portion of the seal lip. The forward and reverse screw threads each have a shape gradually increasing in thread height from the leading end of the lip to the air side. The forward screw threads and/or reverse screw threads are provided with seal protrusions for preventing leakage of droplets.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: March 12, 2019
    Assignee: NOK CORPORATION
    Inventors: Hideharu Hyakutake, Tomoaki Nishimura, Hiroki Matsui, Yuki Sato
  • Patent number: 10208861
    Abstract: A sealing device capable of preventing turnover of a dust lip and damage to a dust lip caused by insertion of a shaft. A bumper portion (125) made of a rubber-like elastic body and reducing an impact that the dust lip (122) receives from the shaft when the shaft is inserted into the sealing device (100) is provided on the side opposite to the sealed area (O) with respect to the dust lip (122), and an inner diameter of a tip of the bumper portion (125) on an inner peripheral side is set to be larger than an outer diameter of a part of the shaft on which a main lip (121) and the dust lip (122) slide and to be smaller than an inner diameter of a part having the largest inner diameter in a portion connecting the main lip (121) and the dust lip (122).
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: February 19, 2019
    Assignee: NOK CORPORATION
    Inventors: Kokichi Hamamoto, Takehiro Nakagawa, Hideaki Nagahamaya, Shiho Sato
  • Patent number: 10197103
    Abstract: A sealing arrangement for sealing a first chamber against a second chamber, the sealing arrangement being located between a first machine element and a second machine element. A relative movement occurs between the two machine elements. The sealing arrangement comprises a sealing element which is equipped with at least one sealing lip. The sealing lip(s) is/are held by the sealing element and is/are fixed by the sealing element at one of the machine elements. The sealing lip(s) is/are in sliding contact with the other machine element. The sealing arrangement comprises a lip element that is fixed with one of the machine elements and is in sliding contact with the other machine element. The lip element comprises a conductive element for establishing electrical conductivity of the lip element, so that electrical conductivity is established between the two machine elements by the lip element in an effective an economical manner.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: February 5, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Alain Gezault, Juergen Kurth
  • Patent number: 9970478
    Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: May 15, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Yuta Negishi, Takeshi Hosoe, Yuuichiro Tokunaga
  • Patent number: 9915289
    Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: March 13, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Yuta Negishi, Takeshi Hosoe, Yuuichiro Tokunaga
  • Patent number: 9869323
    Abstract: A linear gasket for an inter-blade platform that presents a length, the gasket including a linear base for fastening to the inter-blade platform and a linear lip projecting from the linear base, the linear lip including a linear distal end portion configured to contact a pressure side wall or a suction side wall of a blade, a linear groove being formed between the linear base and the linear lip over at least a fraction of a length of the linear gasket. The linear distal end portion includes at least one linear slit extending over at least a fraction of the length of the gasket.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: January 16, 2018
    Assignee: SNECMA
    Inventor: Anne-Laure Ravier
  • Patent number: 9840611
    Abstract: There are provided rubber compositions comprising an elastomer comprising a rubber chosen from acrylonitrile-butadiene, hydrogenated acrylonitrile-butadiene, carboxylated acrylonitrile-butadiene and mixtures thereof; reinforcing fibers chosen from aramid fibers, carbon fibers, polyester fibers, glass fibers, nylon fibers and mixtures thereof, and/or nanometric filamentary structures chosen from nanowires, nanorods, nanofibers, nanoribbons, nanotubes and mixtures thereof, the nanometric filamentary structures being functionalized or unfunctionalized; and a filler chosen from carbon black and silica. These compositions can be cured or uncured and they can be used for preparing various articles. Methods for preparing such compositions are also disclosed.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: December 12, 2017
    Assignee: SOUCY TECHNO INC.
    Inventors: François Bédard, Denis Dubé, Lyle MacDonald, Jean-Damien Coué
  • Patent number: 9829043
    Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: November 28, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Yuta Negishi, Takeshi Hosoe, Yuuichiro Tokunaga
  • Patent number: 9810298
    Abstract: A rotary seal comprising: a shaft with a chromium oxide coating provided at a seal contact area; wherein said coating has a hardness of at least 55 Rockwell-C. The coating may have a surface roughness parameter (Ra) of between 0.2 and 0.4 circular. The coating may have a thickness of at least 0.1 mm. The coating layer forms part of a rotary seal with a flexible seal element that is biased into contact with the surface of the coating. The flexible seal element may be biased against the shaft by a spring to increase the pressure of the flexible seal element against the coating. The coating is preferably deposited by a plasma spray process.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: November 7, 2017
    Assignee: MICROTECNICA S.R.L.
    Inventor: Marco Gianfranceschi
  • Patent number: 9751361
    Abstract: A wheel bearing has a seal device formed as a pack seal with an annular sealing plate and slinger. The sealing plate has a metal core and an integrally adhered sealing member. The sealing member has a base portion, side lip and radial lip. The base portion covers an inner circumferential surface of the metal core. The radial lip slidingly contacts the cylindrical portion of the slinger. A garter spring is mounted on the radial lip. A tightening force of the garter spring is set to 50% or more of a total tightening force of the radial lip. The tightening force of the radial lip without the garter spring is set to 3N or more.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: September 5, 2017
    Assignee: NTN Corporation
    Inventors: Makoto Seki, Tomoko Baba
  • Patent number: 9709173
    Abstract: A radial-shaft sealing assembly includes a sealing lip disposed on a support ring. A cylindrical portion of the sealing lip that abuts on a rotatable shaft contains an elastomeric material and has a profiling for pumping oil or lubricant back to an oil side of the sealing assembly. The profiling includes first and second annular ridges disposed in parallel, and first and second groups of radially-projecting pumping elements disposed therebetween and distributed around the circumference of the cylindrical portion. Each pumping element extending at an angle (?) to the circumferential direction (U) of the cylindrical portion, but the first group of pumping elements has an opposite orientation to the second group of pumping elements.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: July 18, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventor: Juergen Kurth
  • Patent number: 9702463
    Abstract: A sealing device includes an elastic annular seal portion. On an inner peripheral surface of the seal portion, a main lip is in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface gradually enlarges in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a first annular projection is in slidable contact with the outer peripheral surface of the rotary shaft, and a second annular projection that projects toward a radially inward side is disposed between the main lip and the first annular projection. In an initial use state of the sealing device, the second annular projection is not in slidable contact with the rotary shaft; when the main lip wears to a degree that required sealing performance cannot be maintained, the second annular projection starts slidable contact with the rotary shaft.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: July 11, 2017
    Assignees: Koyo Sealing Techno Co., Ltd., Nabtesco Corporation
    Inventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
  • Patent number: 9689376
    Abstract: A sealing arrangement includes an interface seal part arranged between a stationary element of a wind turbine and a rotary element of the wind turbine. The interface seal part is arranged to establish a seal between an interior of the stationary element and an exterior environment. Also a brake disc is realized to accommodate at least a portion of an interface seal part of such a sealing arrangement. Also described is a wind turbine which includes the sealing arrangement and the brake disc.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: June 27, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: James Kenneth Booth, Thorkil Munk-Hansen, Jacob Blach Nielsen
  • Patent number: 9681210
    Abstract: A liquid-tolerant acoustic device assembly includes a housing with an acoustic aperture connected to a through hole in the housing. An acoustic device such as a microphone or speaker that includes a liquid resistant membrane is coupled to the through hole utilizing a gasket. A protrusion is positioned between the through hole and the gasket. The configuration of the assembly may be tuned such that liquid present in the through hole is allowed to exit and/or functioning of the acoustic device is not impaired by the presence of the liquid in the through hole. The assembly may be incorporated into an electronic device.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: June 13, 2017
    Assignee: Apple Inc.
    Inventors: Jesse A. Lippert, Nikolas T. Vitt, Rex T. Ehman
  • Patent number: 9664288
    Abstract: A lip seal-type shaft seal device that exhibits no leakage when at rest; operates under fluid lubrication and prevents leakage when rotating, including during initial rotation; and enables a balance between seal integrity and lubrication is provided. The device includes a plurality of discontinuous pumping areas for generating pumping action via the relative rotational sliding of a lip seal and a rotating member is formed in the circumferential direction on the outer circumferential surface of the rotating member. The plurality of pumping areas is provided with suction portion of pumping areas operating in a direction in which a sealed fluid is drawn in and discharge portion of pumping areas operating in a direction in which the sealed fluid is expelled. A lip of the lip of the lip seal extends in an axial direction towards an atmosphere side, leaving part of the pumping areas uncovered on a sealed fluid side.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: May 30, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yasuhiro Ikeda
  • Patent number: 9644743
    Abstract: The invention provides a sealing device which can inhibit an external dust in an atmospheric side from intruding into a lip end, thereby inhibiting a sealing fluid leakage by trapped dust. In a sealing device inhibiting leakage of a sealing fluid in an inboard side to an atmospheric side, coming into contact with a shaft by a seal lip end and circumferentially having in an atmospheric side inclined surface of the seal lip with a plurality of screws exerting a pumping action to the sealing fluid, a three-dimensional shape for preventing the dust intrusion is provided between the screws so as to inhibit the external dust intrusion in the atmospheric side toward the lip end. The three-dimensional shape is constructed by a projection or a groove extending in a parallel direction to the lip end. The projection or the groove is connected to the screws longitudinally in both end portions.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: May 9, 2017
    Assignee: NOK Corporation
    Inventors: Makoto Kamemura, Hiroki Matsui, Hideharu Hyakutake, Tomoaki Nishimura
  • Patent number: 9593776
    Abstract: The invention provides a sealing device which can inhibit an external dust in an atmospheric side from intruding into a lip end, thereby inhibiting a sealing fluid leakage by trapped dust. In a sealing device inhibiting leakage of a sealing fluid in an inboard side to an atmospheric side, coming into contact with a shaft by a seal lip end and circumferentially having in an atmospheric side inclined surface of the seal lip with a plurality of screws exerting a pumping action to the sealing fluid, a three-dimensional shape for preventing the dust intrusion is provided between the screws so as to inhibit the external dust intrusion in the atmospheric side toward the lip end. The three-dimensional shape is constructed by a projection or a groove extending in a parallel direction to the lip end. The projection or the groove is connected to the screws longitudinally in both end portions.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: March 14, 2017
    Assignee: NOK Corporation
    Inventors: Makoto Kamemura, Hiroki Matsui, Hideharu Hyakutake, Tomoaki Nishimura
  • Patent number: 9568105
    Abstract: A lip-type seal shaft seal device equipped with a lip seal for sealing a rotary member and a stationary member concentrically disposed to the inside and outside in a radial direction, has a plurality of aeration-creating parts for creating aeration through relative rotational sliding of the lip seal and the rotary member, formed in separated fashion in the circumferential direction on the outside peripheral surface of the rotary member. The aeration-creating parts are configured from a plurality of fine grooves arranged in the circumferential direction, extending along the axial direction of the rotary member. The lip of the lip seal extends towards the outside atmosphere side, leaving a portion of the aeration-creating parts at the sealed fluid side in the axial direction.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: February 14, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hiroki Oshima, Masamitsu Sanada, Takeshi Hosoe
  • Patent number: 9482344
    Abstract: An arrangement includes a radial shaft seal (2) that surrounds a shaft (1), wherein an elastomer body (4) forms a sealing lip (5) for bearing against the shaft (1), wherein the sealing lip (5) has a sinusoidally curved sealing edge (6) on its side which faces the shaft (1), which sealing edge runs around along the inner circumference of the sealing lip (5), and wherein the sealing edge (6) bears against the circumferential face (7) of the shaft (1). The radial shaft seal as a single component is able to produce high dynamic seal tightness in a plurality of different applications.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: November 1, 2016
    Assignee: CARL FREUDENBERG KG
    Inventors: Holger Sattler, Erich Prem
  • Patent number: 9458937
    Abstract: A shaft seal assembly including an elastomeric material molded to an annular metal shell is provided. The elastomeric material includes a lip extending from the annular shell to a lip distal end. The lip includes a first lip section projecting toward a center axis, and a second lip section projecting from the first lip section away from the center axis. A dust band is disposed between the first and second lip sections. The elastomeric material also includes flutes disposed on the second lip section and extending helically around the center axis and radially toward the center axis. The dust band can include vents, in which case one of the flutes extends from one side of each vent. The height of the flutes can increase from the dust band to the flute distal end, such that the flutes and the dust band have an equal interior diameter for engaging the shaft.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: October 4, 2016
    Assignee: Federal-Mogul Corporation
    Inventors: David M. Toth, Brent Sedlar
  • Patent number: 9424970
    Abstract: A device includes a first plurality of dielectric layers over a substrate and a second plurality of dielectric layers over the first plurality of dielectric layers. A metal inductor includes a first metal portion, a second metal portion, a third metal portion, and a fourth metal portion, wherein each of the first, the second, the third, and the fourth metal portions extends into the first and the second plurality of dielectric layers. A first metal bridge connects the first metal portion to the second metal portion, wherein the first metal bridge extends into the first plurality of dielectric layers and not into the second plurality of dielectric layers. A second metal bridge connects the third metal portion to the fourth metal portion, wherein the second metal bridge extends into the second plurality of dielectric layers and not into the first plurality of dielectric layers.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: August 23, 2016
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jun-De Jin, Tzu-Jin Yeh
  • Patent number: 9410555
    Abstract: A sealing assembly includes a seal support having a support ring made from an elastomeric material, at least one seal element having a ring made from a polymer material, and an abutment ring against which a radial portion of the seal element axially abuts. The seal element is connected in a materially-bonded manner to the support ring along a first radially outer portion of the seal element, and the seal element axially abuts on the abutment ring along a second radially inner portion of the seal element. The seal element and the abutment ring are free of any connection along the second radially inner portion of the seal element.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: August 9, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Helmut Benedix, Juergen Kurth, Willy Seewald, Roland Worsley
  • Patent number: 9360116
    Abstract: A seal includes a sealing lip having a sealing region with a pumping structure that can abut on a first component. The pumping structure causes a liquid medium to move in a direction from a first axial side of the seal towards or to a second axial side of the seal when the first component rotates relative to a second component. The pumping structure includes at least one pumping groove that extends along a direction of extension and at least one retaining structure disposed in the at least one pumping groove. The at least one retaining structure reduces a cross-section of the at least one pumping groove, in at least one direction perpendicular to the direction of extension, to a value of between 50% and 90% of an extension of the cross-section of the pumping groove outside the at least one retaining structure along the at least one direction.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: June 7, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Juergen Netzer, Helmut Benedix, Willy Seewald
  • Patent number: 9353796
    Abstract: A sensor-bearing unit, adapted for implementation in an oil lubricated environment and comprising: a bearing including at least one rotating ring movable in rotation around a central axis, and a detection device for tracking the rotation of the rotating ring. The detection device is locked to the bearing and includes at least one target and at least one sensor associated with the target. At least one axial side of the bearing includes a passage opened along an axial direction parallel to the central axis and allowing an oil flow through the bearing. The detection device includes an air gap defined radially to the central axis between a maximum outer radius of the target and a minimum inner radius of the sensor.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 31, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Susanne Blokland, Pierrick Maze, Vincent Sausset
  • Patent number: 9322475
    Abstract: A sealing element for sealing a shaft comprises a stiffening part, a first elastomer part connected to the stiffening part and adapted to adjoin the housing part and provide a static seal relative, and a second elastomer part of an elastomer material different from the elastomer material forming the first elastomer part. The second elastomer part is connected to the stiffening part and comprises a sealing section adapted to adjoin the shaft to seal a space. The sealing section comprises a return structure for returning a leaking fluid to a space to be sealed. The sealing section also comprises a region at one axial end portion of the sealing section which is peripherally closed in itself and extends along an inner surface of a circular cylinder portion of the sealing section that is adapted to adjoin and seal the shaft as the shaft is not turning.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: April 26, 2016
    Assignee: AB SKF
    Inventors: Jürgen Kurth, Jürgen Netzer, Wolfgang Irmen, Willy Seewald
  • Patent number: 9309615
    Abstract: A water-conducting household appliance having a rotatable component, which is rotatably mounted on a stationary component of the household appliance by way of a bearing formed from a metallic material, and having a sealing element, by means of which the bearing is sealed off from a liquid chamber of the household appliance, wherein a contact surface of the sealing element is in contact with a contact surface of a shaft part which is connected to the moveable component and can be rotated relative to the sealing element, and slides on the contact surface of the shaft part. A pump is on at least one of the contact surfaces, by means of which liquid can be conveyed out of an intermediate space embodied between the respective contact surfaces in the direction of the liquid chamber when rotating the rotatable component.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: April 12, 2016
    Assignee: BSH Hausgeräte GmbH
    Inventors: Jürgen Heβ, Petra Pfister, Vladimir Proseanic, Svetlana Visnepolschi
  • Patent number: 9261139
    Abstract: A sealing or bearing structure for sealing or separating moving surfaces is provided. The sealing or bearing structure includes a main body that defines a body axis going through the main body. A contact surface is configured to slidingly contact another surface, such as a rod, and defines a contact axis that is parallel to the body axis. At least one geometric surface feature, such as a shaped edge, is located between the body axis and the contact axis. The geometric surface feature has an entry angle that is less than 5 degrees relative to the contact axis.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: February 16, 2016
    Assignee: Trelleborg Sealing Solutions US
    Inventor: Timothy J. McCulfor
  • Patent number: 9228658
    Abstract: A seal assembly for sealing a space between a housing and a rotary shaft includes a generally annular sealing member having a central axis and inner and outer circumferential surfaces extending about the axis, at least a portion of the inner surface providing a sealing surface engageable with the shaft outer surface so as to define a seal interface with opposing axial ends. The sealing surface is configured to direct substances entering the interface toward at least one of the axial ends. Further, an annular biasing member is disposed about the sealing member outer surface and configured to exert a radially-inwardly directed force on the sealing member so as to generate contact pressure within the seal interface. The biasing member is arranged on the sealing member such that at least a portion of the biasing member extends axially in general alignment with at least a portion of the sealing surface.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: January 5, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Yefim Epshetsky, Alex Paykin
  • Patent number: 9103446
    Abstract: A fluid seal assembly is disposable between an outer surface, i.e. engine block or any other part that requires application of the assembly and a rotatable member, such as, for example a shaft, wherein the assembly circumscribes the shaft and lubricates the shaft and the same rotates around the axis. The assembly includes at least three members: a casing unit, a sealing ring unit, and a liner. The assembly eliminates problems associated with prior art designs such as static leakage of oil, and clogging up the spirals with carbonized oil that negatively impact lifecycle of the fluid seals.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: August 11, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventor: Linas L. Maskaliunas
  • Patent number: 9086151
    Abstract: A hydrodynamically lubricating geometry for the generally circular dynamic sealing lip of rotary seals that are employed to partition a lubricant from an environment. The dynamic sealing lip is provided for establishing compressed sealing engagement with a relatively rotatable surface, and for wedging a film of lubricating fluid into the interface between the dynamic sealing lip and the relatively rotatable surface in response to relative rotation that may occur in the clockwise or the counter-clockwise direction. A wave form incorporating an elongated dimple provides the gradual convergence, efficient impingement angle, and gradual interfacial contact pressure rise that are conducive to efficient hydrodynamic wedging. Skewed elevated contact pressure zones produced by compression edge effects provide for controlled lubricant movement within the dynamic sealing interface between the seal and the relatively rotatable surface, producing enhanced lubrication and low running torque.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: July 21, 2015
    Assignee: Kalsi Engineering Inc.
    Inventors: Lannie L. Dietle, John E. Schroeder
  • Publication number: 20150115543
    Abstract: An oil seal includes a bidirectional thread formed by the combination of a normal thread and a reverse thread and including ship-bottom-shaped threads as the threads, in which sealing performance by the thread can be improved. A normal thread and a reverse thread that exhibit a pumping action on a sealing fluid are provided side by side on the circumference on an atmospheric-side surface of a seal lip sliding portion. The normal thread and an reverse thread are respectively threads in which a parallel thread that begins from a lip tip and a ship-bottom-shaped thread continuous with the parallel thread are integrally continuous.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 30, 2015
    Inventor: Takehiro NAKAGAWA
  • Patent number: 8967986
    Abstract: To provide a higher sealing capability irrespective of the pressure difference between compression chambers, lips having leading ends extended toward the inner surface of a recessed groove are formed. At least some of the lips have a base end that is shaped to reduce rigidity against extension of the lips.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: March 3, 2015
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Toshikazu Harashima, Yoshiyuki Kanemoto, Koji Fukui, Susumu Sakamoto
  • Patent number: 8950753
    Abstract: A radial shaft seal to isolate an air side of the seal from an oil side of the seal is provided. The seal includes a mounting portion and a seal lip having a sealing surface extending between an oil side end and an air side end. An annular bridge is connected to the oil side end by a first hinge and to the mounting portion by a second hinge. The bridge extends in overlying relation to the seal lip. A projection extends from the first hinge away from the bridge. A plurality of ribs extend radially inwardly from the projection. A plurality of nubs extend axially from the oil side end of the seal lip toward the oil side of the shaft seal. The ribs and nubs minimize friction between the seal and a shaft during installation and prevent the seal lip from inverting during an oil-side installation assembly.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: February 10, 2015
    Assignee: Federal-Mogul Corporation
    Inventors: Brent R. Sedlar, David M. Toth
  • Patent number: 8931452
    Abstract: The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: January 13, 2015
    Assignees: Honda Motor Co., Ltd., Daikin Industries, Ltd.
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Patent number: 8925927
    Abstract: A dynamic seal advantageously utilizes a groove on the active side or surface of the seal to capture a leaked lubricant and hydrodynamically pump the lubricant back into the lubricated side of the seal. The groove stops short of the leading edge of the seal that faces the lubricant side thereby forming a static dam between the termination point of the groove and the seal edge. When the fluid pressure within the groove adjacent the static dam exceeds the opening pressure for the seal lip, the lubricant within the groove is pumped back into the lubricant side of the seal. The groove can have an induction zone wherein the fluid pressure rise is gradual and a booster zone wherein the fluid pressure rise is relatively faster than in the induction zone. The booster zone is disposed adjacent the static dam.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: January 6, 2015
    Assignee: Freudenberg-Nok General Partnership
    Inventor: Alexander Berdichevsky
  • Patent number: 8919782
    Abstract: A dynamic lip seal is provided for sealing between a housing and a shaft and with a fluid medium to be sealed on an oil side and air on an air side of the seal. The seal includes a seal lip extending from a seal body and including a shaft contact portion adapted for engagement with the shaft and including a static band and a first set of spiral grooves disposed on an oil side of the static band, and a second set of spiral grooves on an air side of the static band. The first and second sets of spiral grooves are both configured to pump oil toward the static band when the shaft is rotated in a first direction, and the first and second sets of spiral grooves are both configured to pump oil away from the static band when the shaft is rotated in a second direction.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: December 30, 2014
    Assignee: Freudenberg-NOK General Partnership
    Inventor: Alexander Berdichevsky
  • Publication number: 20140312571
    Abstract: A radial-shaft sealing assembly includes a sealing lip disposed on a support ring. A cylindrical portion of the sealing lip that abuts on a rotatable shaft contains an elastomeric material and has a profiling for pumping oil or lubricant back to an oil side of the sealing assembly. The profiling includes first and second annular ridges disposed in parallel, and first and second groups of radially-projecting pumping elements disposed therebetween and distributed around the circumference of the cylindrical portion. Each pumping element extending at an angle (?) to the circumferential direction (U) of the cylindrical portion, but the first group of pumping elements has an opposite orientation to the second group of pumping elements.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 23, 2014
    Inventor: Juergen KURTH
  • Publication number: 20140175748
    Abstract: A seal includes a sealing lip having a sealing region with a pumping structure that can abut on a first component. The pumping structure causes a liquid medium to move in a direction from a first axial side of the seal towards or to a second axial side of the seal when the first component rotates relative to a second component. The pumping structure includes at least one pumping groove that extends along a direction of extension and at least one retaining structure disposed in the at least one pumping groove. The at least one retaining structure reduces a cross-section of the at least one pumping groove, in at least one direction perpendicular to the direction of extension, to a value of between 50% and 90% of an extension of the cross-section of the pumping groove outside the at least one retaining structure along the at least one direction.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 26, 2014
    Applicant: Aktiebolaget SKF
    Inventors: Juergen Netzer, Helmut Benedix, Willy Seewald
  • Publication number: 20140151967
    Abstract: A sealing lip seals a first space from a second space with respect to a liquid medium present in the first space. The sealing lip has abutment surface configured to abut on a sealing surface of a component that is movable relative to the sealing lip along a direction of movement. A groove is defined in the abutment surface and pumps any liquid medium present in the groove towards the first space along the direction of movement. The groove extends completely within the abutment surface and is enclosed by the abutment surface, such that it does not intersect either lateral edge of the sealing lip.
    Type: Application
    Filed: May 24, 2012
    Publication date: June 5, 2014
    Inventors: Helmut Benedix, Juergen Kurth, Juergen Netzer, Christoph Passow, Willy Seewald
  • Patent number: 8720903
    Abstract: A fluid seal assembly (the assembly) of the present invention is disposed between an outer surface, i.e. engine block or any other part that requires application of the assembly and a rotatable member, such as, for example a shaft, wherein the assembly circumscribes the shaft and lubricated the shaft and the same rotates around the axis. The assembly includes at least three members: a casing unit, a sealing ring unit, and a collar. The assembly eliminates problems associated with prior art designs such as static leakage of oil, clogging up the spirals with carbonized oil that negatively impact lifecycle of the fluid seals.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: May 13, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Yefim Epshetsky, Alex Paykin
  • Patent number: 8714561
    Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 6, 2014
    Assignee: Nok Corporation
    Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
  • Publication number: 20140110904
    Abstract: A dynamic lip seal is provided for sealing between a housing and a shaft and with a fluid medium to be sealed on an oil side and air on an air side of the seal. The seal includes a seal lip extending from a seal body and including a shaft contact portion adapted for engagement with the shaft and including a static band and a first set of spiral grooves disposed on an oil side of the static band, and a second set of spiral grooves on an air side of the static band. The first and second sets of spiral grooves are both configured to pump oil toward the static band when the shaft is rotated in a first direction, and the first and second sets of spiral grooves are both configured to pump oil away from the static band when the shaft is rotated in a second direction.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventor: Freudenberg-NOK General Partnership
  • Patent number: 8678397
    Abstract: In a U-cup based seal of a rod, the basic body of the U-cup 3 is recessed relative to a square cross-sectional shape in the region of a radially inner outer edge 18 on the low pressure side in order to obtain a space 17 between the U-cup 3 and the opening, i.e. the passage opening 16 of a sealing gap 15, leading into a rectangular groove 4 guiding the U-cup 3. This space 17 remains at least partially also upon pressurization such that the U-cup 3 complete remains in the groove 4 upon pressurization and is not extruded into the sealing gap 15. This considerably reduces wear of the U-cup 3. An inner surface 24 of the U-cup shows liquid dragging bore reliefs formed as recesses 25 in the inner surface 24 of the U-cup 3 for transferring hydraulic liquid, disposed on a surface of the translatory movable machine part 1, from a low-pressure side N of the U-cup to a high-pressure side H of the U-cup 3 upon translatory movement of the movable machine part 1.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: March 25, 2014
    Assignee: Trelleborg Sealing Solutions Germany GmbH
    Inventors: Joerg Peter, Jean-Jacques Adolf, Holger Jordan
  • Patent number: 8651496
    Abstract: A seal to seal a gap between a rotatable component (4, 18) and a non-rotatable component comprises: A fastening section adapted to be fixedly mounted in relation to the non-rotatable component, a sleeve-like section (3) adapted to be mounted around the rotatable component (4, 18), a resilient section (7) between the sleeve-like and fastening section comprising an arcuate portion (8), and in an unmounted condition, the sleeve-like section (3) has an inner diameter, DSEAL, with a predefined magnitude relative to an outer diameter of the rotating component, DSHAFT, such that 0.9?DSEAL/DSHAFT?1.1.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: February 18, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Jürgen Kurth, Clifford Roland Worsley
  • Patent number: 8646782
    Abstract: A sealing arrangement, comprising a shaft (1) to be sealed, which is enclosed by a radial shaft seal (2), wherein the radial shaft seal (2) comprises two sealing lips (7, 8) for mutually sealing two spaces (5, 6) to be sealed and filled with a medium (3, 4) to be sealed, said sealing lips being disposed axially adjacent to each other at a distance from each other and delimiting a lubricant reservoir (18) with the shaft (1) to be sealed, wherein the first sealing lip (7) is axially curved in the direction of the first space (5) to be sealed in order to seal the first medium (3) to be sealed, and wherein the second sealing lip (8) is axially curved in the direction of the second space (6) to be sealed in order to seal the second medium (4) to be sealed, wherein both sealing lips (7, 8) each have at least one sealing rib (9, 10), which are delimited by mutually intersecting conical surfaces (11, 12; 13, 14), wherein on both sealing ribs (9, 10) the first conical surface (11, 13) facing the first space (5) to be
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: February 11, 2014
    Assignee: Carl Freudenberg KG
    Inventor: Ulrich Dahlhaus-Preussler
  • Publication number: 20140035238
    Abstract: A seal backup ring assembly is provided that eliminates fluid differential pressure acting radially on the backup ring, preventing collapse of the backup ring against a shaft. The backup ring is assembled so that the initial clearance (extrusion gap) between the backup ring and relatively rotating member is not affected by the differential pressure acting across the assembly. This allows for an initially small extrusion gap to be present throughout the differential pressure range.
    Type: Application
    Filed: October 11, 2013
    Publication date: February 6, 2014
    Applicant: Kalsi Engineering, Inc.
    Inventors: Aaron Paul Richie, Lannie Laroy Dietle
  • Publication number: 20140008875
    Abstract: The present invention is a generally circular rotary seal that establishes sealing between relatively rotatable machine components for lubricant retention and environmental exclusion, and incorporates seal geometry that interacts with the lubricant during relative rotation to distribute a lubricant film within the dynamic sealing interface. The features of a variable inlet size, a variable dynamic lip flank slope, and a reduction in the magnitude and circumferentially oriented portion of the lubricant side interfacial contact pressure zone at the narrowest part of the lip, individually or in combination thereof, serve to maximize interfacial lubrication in severe operating conditions, and also serve to minimize lubricant shear area, seal torque, seal volume, and wear, while ensuring retrofitability into the seal grooves of existing equipment.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 9, 2014
    Applicant: Kalsi Engineering, Inc.
    Inventors: Lannie Laroy Dietle, John Erick Schroeder