Bias Feature Other Than Nominal Garter Spring Patents (Class 277/553)
  • Patent number: 10377321
    Abstract: A rotary locking joint that has zero backlash is provided to secure a camera mast mounted on a vehicle in a deployed position. The joint is passive to lock while being easily releasable. The joint prevents rotation of the mast in one direction, with a hard stop element that prevents further rotation of the mast in the opposite direction. The locking joint includes a pawl member configured to rotate about a pawl rotation axis. The pawl member is maintained in place in the locked position via a torsion spring to ensure contact with a base portion of the mast. To release the joint, the pawl member is rotated in the opposite direction to remove a geometry interference condition. A sensor is arranged to detect whether the pawl member is in an unlocked position relative to the mast.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: August 13, 2019
    Assignee: Google LLC
    Inventors: Mark Yerdon, Jordan Wakser
  • Patent number: 10260635
    Abstract: A sealing apparatus for sealing between a rotary shaft 11 and a housing 12 that can be rotated relative to each other, having a circular ring body 3 provided on the rotary shaft 11 and a seal lip body 6 made of a flexible material provided on the housing 12, wherein the seal lip body 6 has a discharge fin 8 on the outer peripheral side of a sealing part 6a which makes sliding contact with the circular ring body 3, and when the two members 11 and 12 rotate relative to each other, the surface of the discharge fin 8 on the side advancing relative to the circular ring body 3 composes an inclined surface receding more on the front edge side than the base end side of the discharge fin 8, and by this inclined surface, oil is discharged away from the sealing portion 6a.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 16, 2019
    Assignee: NOK CORPORATION
    Inventor: Masayuki Tanida
  • Patent number: 10184501
    Abstract: In a fluid pressure cylinder, a first positioning ring is provided detachably on a first annular projection of a head cover, and a second positioning ring is provided detachably on a second annular projection of a rod cover. Further, a structure is provided in which opposite ends of a cylinder tube are inserted over and capable of being retained on outer circumferential sides of the first and second positioning rings. As a result, by preparing a new cylinder tube having a different diameter, and new first and second positioning rings, and mounting the new cylinder tube through the new first and second positioning rings, which are installed on the first and second annular projections, a fluid pressure cylinder having a different bore diameter can be obtained.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: January 22, 2019
    Assignee: SMC CORPORATION
    Inventor: Kenji Nomura
  • Patent number: 10167955
    Abstract: A rotary seal apparatus for a rotating drum includes a mounting ring. The apparatus includes seal flaps attached to the ring. The apparatus includes wear pads attached to the seal flaps having a wear side and an exposed side. The apparatus includes eye nuts extending upwards from the seal flaps and from the wear pads. The apparatus includes a first tensioner extending through the eye nuts. The apparatus includes a cover that is disposed over the seal flaps and the exposed side of the wear pads. A method for forming a rotary seal apparatus for a rotating drum.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: January 1, 2019
    Inventor: Shawn Robert Sutton
  • Patent number: 10119570
    Abstract: A hub bearing and a seal device therefore are disclosed. In one example, the hub bearing seal device includes inner and outer rings, a ring-shaped seal, and a seal retaining ring. A metallic framework is provided inside the seal. The seal is fixed to the outer ring via the metallic framework and a seal lip edge is provided on the metallic framework of the seal. The seal lip edge is in contact with the seal retaining ring in interference fit. The seal is further provided with another layer of metallic framework having a different thermal expansion coefficient from that of the metallic framework. Together, the metallic frameworks form a bimetallic sheet type framework. During the operation of the seal device, the bimetallic sheet type framework can adjust the amount of interference between the seal lip edge and the seal retaining ring dynamically according to temperature change.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: November 6, 2018
    Assignee: SCHAEFFLER TECHNOLOGIES G & CO KG
    Inventors: Jianchang Zhang, Chenxi He, Zhongdong Chai
  • Patent number: 10100931
    Abstract: An annular seal for a low friction bonded piston seal is provided. The annular seal having a central axis and including an annular seal body symmetrically positioned about the central axis. The annular seal is integrally molded to the body and provides a lower seal lip body, and a top seal lip. The top seal lip including a first radial lip thickness T1 and a second radial lip thickness T2. A ratio between second radial lip thickness T2 to first radial lip thickness T1 is less than 1.00. The annular seal includes a radial lip height H, and a radial lip overall pressure received thickness T3. A ratio of radial lip height H to second radial lip thickness T2 is greater than or equal to 0.65. The radial lip overall pressure received thickness T3 is less than or equal to 0.8 mm. The first radial lip thickness T1 is less than or equal to 0.7 mm.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: October 16, 2018
    Assignee: AKTIEBOLAGET SKF
    Inventors: Robert D Pecak, Daniel J Levy, Lance A Petzold
  • Patent number: 9933072
    Abstract: In a working cylinder, with a cylinder casing, in the cylinder interior of which is mounted a driving piston capable of linear movement under fluidic pressurization, wherein the cylinder casing is mounted between two cylinder covers closing the cylinder interior, wherein the cylinder covers each have a central section and an outer frame section, with at least four mounting areas and encompassing the central section, wherein there is formed between the frame section and the central section an annular space, in which are provided reinforcing struts aligned radially and each extending towards an assigned mounting area, outer surfaces of each reinforcing strut diverge away from the assigned mounting area towards the central section.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: April 3, 2018
    Assignee: FESTO AG & CO. KG
    Inventors: Klaus Reichert, Andreas Schleth
  • Patent number: 9845881
    Abstract: A shaft seal in which a seal element a seal element and a gasket as held members are held between an outer case and an inner case, and, a protruding portion to locally increase holding pressure on the seal element is disposed on a pressing face for held member of the inner case.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: December 19, 2017
    Assignee: MITSUBISHI CABLE INDUSTRIES, LTD.
    Inventor: Nobukazu Fujii
  • Patent number: 9611712
    Abstract: A system, in certain embodiments, includes a lip seal having an outer diameter portion including an outer protrusion configured to contact a first seal interface, wherein the protrusion has a curved surface.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: April 4, 2017
    Assignee: OneSubsea IP UK Limited
    Inventor: Christopher Lance Kalinec
  • Patent number: 9599227
    Abstract: A lip seal includes: a lip part (1) forming a ring shape alone or with plural members and provided in sliding contact with the entire periphery of a surface of a shaft (0); an elastic arm part (2) and a flexible wall (3) supporting the lip part (1) at a sliding contact position; key parts (4) connecting the elastic arm part (2) and the flexible wall (3) to a housing (10), respectively, and a pressure regulation chamber (A) forming a ring shape alone or with plural members and using the elastic arm part (2) and the flexible wall (3) as partition walls. The flexible wall (3) is deformed by the increase and decrease in pressure in the pressure regulation chamber (A) to change the lip part (1) at least radially.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: March 21, 2017
    Assignee: WARTSILA JAPAN LTD.
    Inventors: Nobuhiro Himeno, Mashiba Kyogoku, Masakazu Tamura
  • Patent number: 9523961
    Abstract: A watch case having a through-hole, an operating member including an operating shaft to be inserted to the through-hole of the watch case, an exterior member mounted on the operating member and configured to be displaced in a shaft direction of the operating shaft and be rotated together with the operating member, and a buffer member located between the operating member and the exterior member are provided. Therefore, when the exterior member receives impact from outside, the impact can be buffered by the buffer member. As a result, the operating member can be prevented from being damaged because the impact from the outside is not directly transmitted to the operating member, thereby improving impact resistance.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: December 20, 2016
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Kazuma Kobayashi, Junichi Sato, Yoshihiro Maruyama, Masao Amano
  • Patent number: 9120526
    Abstract: A front fork includes a fork body having an outer tube and an inner tube relatively movably inserted into the outer tube in an axial direction, a damper housed in the fork body to dampen relative movement between the outer and inner tubes, a biasing member that biases the fork body in an expansion direction at all times, an annular dust seal that is held in the outer tube and makes sliding contact with an outer circumference of the inner tube, an annular oil seal that is held in the outer tube inside the fork body to be inner than the dust seal and makes sliding contact with the outer circumference of the inner tube, and a C-shaped scraper that is provided between the dust seal and the oil seal and makes sliding contact with the outer circumference of the inner tube.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: September 1, 2015
    Assignee: KAYABA INDUSTRY CO., LTD.
    Inventors: Hideaki Ogura, Kazuto Shindo, Takaaki Nakano
  • Patent number: 8985590
    Abstract: A seal assembly can be incorporated into a track pin cartridge assembly of an undercarriage of a track-type machine. The seal assembly can include a pin defining a longitudinal axis and first and second members both coaxial with the pin about the longitudinal axis. The first member is pivotable about the longitudinal axis with respect to the second member and includes a load ring engagement surface defining a seal cavity disposed in proximal relationship to the second member. A seal assembly, including a seal ring and a load ring, is disposed in the seal cavity and sealingly engages the first and second members. A radial segment of a first member engagement surface of the load ring is radially offset, measured along a radial axis perpendicular to the longitudinal axis, from a radial segment of a seal ring engagement surface of the load ring.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: March 24, 2015
    Assignee: Caterpillar
    Inventors: Guanghui Liang, Mark Diekevers, Mark Kiesel, Eric Johannsen, Jason Sebright
  • Publication number: 20150069713
    Abstract: A seal assembly is for sealing between a housing and a rotary shaft includes an annular sealing member coupled with the housing and having inner and outer circumferential surfaces and a plurality of projections extending radially from the outer surface and spaced circumferentially about a central axis. Each projection has first and second axial ends and the plurality of projections define first and second projections. An annular biasing member is disposed about the sealing member outer surface and exerts an inwardly directed force on the sealing member. The biasing member has first and second ends and is arranged on the sealing member with the biasing member first end contacting the second end of each first projection and the biasing member second end contacting the first end of each second projection. As such, the biasing member extends axially and circumferentially between the first and second projections.
    Type: Application
    Filed: December 17, 2012
    Publication date: March 12, 2015
    Applicant: AKTIEBOLAGET SKF
    Inventors: Yefim Epshetsky, Alex Paykin
  • Publication number: 20150061368
    Abstract: A seal assembly can be incorporated into a track pin joint assembly including a pin defining a longitudinal axis, a first member and a second member both coaxial with the pin about the longitudinal axis. The first member is pivotable about the longitudinal axis with respect to the second member and includes a load ring engagement surface defining, at least in part, an axially-extending seal cavity disposed in proximal relationship to the second member. A seal assembly including a seal ring and a load ring is disposed in the seal cavity and sealingly engages the first member and the second member. The load ring includes a main body and a neck having a neck perimeter with a first sealing blade disposed along the neck perimeter and comprising an outwardly-extending projection. The first sealing blade is adapted to sealingly engage one of the seal ring and the first member.
    Type: Application
    Filed: July 31, 2014
    Publication date: March 5, 2015
    Applicant: Caterpillar Inc.
    Inventors: Guanghui Liang, Mark Diekevers, Mark Kiesel, Darren Antoine, Temitope Akinlua, Travis King
  • Publication number: 20150054226
    Abstract: A shaft seal includes a radially outward flange area and a radially inward sealing lip connected to the flange area. An annular spring with a U-shaped or V-shaped cross section is arranged on a radial outer face of the sealing lip, wherein an outer limb bears on the flange area and an inner limb bears on the sealing lip, and wherein a surface of the spring exposed to an exterior of the shaft seal is coated with an elastomer. The invention also relates to a method for producing a shaft seal.
    Type: Application
    Filed: August 18, 2014
    Publication date: February 26, 2015
    Inventors: Hubert Sonleiter, Raphael Spycher
  • Publication number: 20150008645
    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: Application
    Filed: December 14, 2012
    Publication date: January 8, 2015
    Applicant: AKTIEBOLAGET SKF
    Inventors: Yefim Epshetsky, Alex Paykin
  • Patent number: 8894070
    Abstract: An energized composite metal to metal seal. A sealing device includes a metal seal with a metal sealing surface facing radially outward, and another metal sealing surface facing radially inward; and a nonmetal seal including a nonmetal sealing surface positioned proximate one metal sealing surface and facing radially outward, and another nonmetal sealing surface positioned proximate the other metal sealing surface and facing radially inward. A method of sealing between a housing assembly and a closure member includes applying a pressure differential across the sealing device while the sealing device seals between the housing assembly and the closure member, and the pressure differential increasing contact pressure in a metal to metal seal between the housing assembly and a metal sealing surface on the metal seal, and increasing contact pressure in a metal to metal seal between the closure member and another metal sealing surface on the metal seal.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: November 25, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Gireesh K. Bhat, David W. Teale
  • Patent number: 8806750
    Abstract: A forced oscillation radial seal is described for regenerative air preheaters which contain rotatable radial plates having upper and lower edges. The forced oscillation seal includes a base with a first portion attached to a lateral face of the plates adjacent the upper and lower edges, and a second free portion, with a pivot system having an axis attached to the second free portion, and a rigid sealing sheet with a first free portion, second portion, and central portion, the sealing sheet attached at its central portion to the pivot system. The forced oscillation seal includes a counterweight attached to the sealing sheet so the sealing sheet reassumes a vertical position after forming a seal with a sealing surface, and a plurality of springs in contact with the sealing sheet and base along the axis of the pivot system, which cooperate with the counterweights to force the seal to oscillate.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: August 19, 2014
    Inventor: Fernando Treviño Hurtado
  • Patent number: 8727356
    Abstract: Seal (1) for sealing a shaft (2), comprising a supporting ring (3) and at least one sealing lip (4) made of polymeric material, the pressing of the sealing lip (4) against the shaft (2) taking place by magnetic interaction, the sealing lip (4) containing magnetizable particles (5).
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: May 20, 2014
    Assignee: Carl Freudenberg KG
    Inventors: Dominique Lutaud, Fabrice Fougerolle
  • Patent number: 8708306
    Abstract: A tunable valve assembly reduces valve-generated vibration. One embodiment comprises a valve body and valve seat having substantially collinear longitudinal axes. A rebound characteristic frequency is associated with rebound of the elastic valve body base plate from forceful contact with the valve seat. A central cavity in the valve body encloses a spring-mass damper optionally immersed in a dilatant liquid and having a damper resonant frequency approximating a pump housing resonance. A lateral support assembly adjustably secured to the valve seat has a support resonant frequency designed in conjunction with the rebound characteristic frequency and the damper resonant frequency. Combined hysteresis heat loss associated with the above three vibration frequencies is reflected in lower closing energy impulse amplitude and damping of associated vibrations.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 29, 2014
    Inventors: Barbara C. Gilstad, Dennis W. Gilstad
  • Patent number: 8684362
    Abstract: The present cartridge seal assemblies pertain to rotary lip-type seals. In certain embodiments, a sealing member is constructed of a relatively hard material that increases the lifespan of the sealing member. The sealing member is energized with a canted-coil spring, which in some embodiments includes an adjustable spring force. The present embodiments enable control of sealing force to achieve an appropriate sealing force between the sealing member and the shaft based on factors such as temperature, pressure, rotary speed, properties of fluid media, etc. to achieve longer seal life.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: April 1, 2014
    Assignee: Bal Seal Engineering, Inc.
    Inventors: Pete Balsells, Farshid Dilmaghanian, Derek Changsrivong
  • Patent number: 8602419
    Abstract: A dynamic shaft seal assembly for sealing a rotating or reciprocating shaft includes an elastic seal member having at least a portion thereof in sealing communication with the rotating or reciprocating shaft. A shape memory alloy element is in contact with the elastic seal member, the shape memory alloy element being discontinuously disposed about the elastic seal member, and being configured to i) directly apply a compressive force in a radial direction on the seal member against the rotating or reciprocating shaft, and ii) maintain the compressive force on the seal member as a function of temperature. The seal assembly is adapted to seal at a temperature ranging from about ?55° C. to about 250° C. Methods including the seal assembly are also disclosed.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: December 10, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Alan L. Browne, Nancy L. Johnson
  • Publication number: 20130323103
    Abstract: Low-pressure and high-pressure reciprocating and rotary applications use seal assemblies to prevent leakage. One embodiment of a seal assembly includes a major annular body having opposing spaced-apart annular lips extending from a heel portion with a bore extending through the heel portion. A first spring is disposed between the lips, biasing the lips apart. A minor annular body extends from one of the lips of the major annular body. The minor annular body has opposing spaced-apart walls that extend from a base region and form a pocket. A second spring is disposed in the pocket between the spaced-apart walls, biasing the walls apart. During actuator operation, pressurized fluid urges one wall of the minor annular body against a pump head surface to produce a face seal and one of the lips of the major annular body against a rod surface to produce a radial seal.
    Type: Application
    Filed: March 9, 2012
    Publication date: December 5, 2013
    Applicant: WATERS TECHNOLOGIES CORPORATION
    Inventors: Joshua A. Shreve, Neal Almeida
  • Publication number: 20130307222
    Abstract: In a seal (1) of shafts (7) relative to a medium, being received in housing-fixed support rings (4, 5), it is provided that in an embodiment of the seal with a clamp-in element (3) and an angled element with a seal lip (2) arranged via an intermediate part (6) whereby a contact pressure is applied via a spring (10). For this it is provided that the spring (10) is embodied in a receiving groove (11) as a spring pocket with a free space (12) for the spring in the pressureless state. A nose (13) as a retaining element for the inserted spring is arranged on the membrane as an intermediate part (6) above the spring pocket (11). The membrane is adjustable upon changing a tilt angle (?) by pressure loading up to reaching a limit pressure for contacting on an allocated housing wall (16) such as an extended support ring (5). Thereby an enlarged bottom side contact angle (?) is established in the angled region with the seal lip (2).
    Type: Application
    Filed: February 29, 2012
    Publication date: November 21, 2013
    Applicant: BLOHM + VOSS INDUSTRIES GMBH
    Inventors: Ernst Peter Von Bergen, Lars Ziemen, Carlos Fangauf, Dieter Von Borstel, Guido Wuestenhagen, Ivan Ristic
  • Patent number: 8505925
    Abstract: A seal assembly configured for sealing a dynamic shaft includes an elastic seal member disposable in sealing communication with the dynamic shaft. The seal assembly further includes a coil spring and a shape memory alloy element. The coil spring is disposed in contact with the elastic seal member and configured for applying a compressive force to the elastic seal member. The shape memory alloy element is configured for applying pressure to the coil spring to thereby augment the compressive force.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: August 13, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Xiujie Gao, Alan L. Browne, Nancy L. Johnson
  • Patent number: 8419020
    Abstract: A fluid activated shaft bulkhead seal system includes an annular carrier fixed with respect to a bulkhead and about a shaft extending through the bulkhead and the annular carrier. The annular carrier supports a pair of lip seals each of which defines an outwardly facing pocket and a lip portion spaced from the shaft and a portion abutting the carrier. A foam body is disposed in the pocket of each lip seal. Each foam body includes a gel material configured to expand in the presence of fluid urging the lip portions of the lip seals into contact with the shaft to seal the annular carrier with respect to the shaft. An annular retainer is mated to each side of the annular carrier for retaining the foam body in the pocket of each lip seal.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Mide Technology Corporation
    Inventors: Marthinus van Schoor, Christopher C. Ludlow, Steven A. Klepper, Andrew M. Cutler
  • Patent number: 8403336
    Abstract: A hand power tool has a housing with having at least two housing parts. A sealing element provides mounting of the housing parts on one another fluid-tightly. The housing parts have short sides with which the housing parts abut against one another with interposition of a sealing element. The sealing element is fixed on one of the housing parts.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: March 26, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Fuchs, Heiko Roehm, Juergen Gairing, Jens Blum
  • Patent number: 8336887
    Abstract: A seal assembly disposed between relatively rotating members such as a rotating shaft passing through an opening in a stationary housing. The seal assembly may include a housing, such as a canister, and a seal member retained in the canister. The seal member may include an inner portion and an outer portion interconnected by a flexible wall and an aperture for receiving the shaft. The flexible wall may permit the inner portion to move relative to the outer portion of the seal member. The inner portion of the seal member may forms a seal with the shaft, and the seal member may rotate with the shaft within the canister. The seal assembly may engage an oil seal and may function as an excluder seal.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: December 25, 2012
    Inventor: Gregory H. Petrak
  • Patent number: 8292301
    Abstract: A multifunction ring comprises an elastomeric body which totally encloses at least one circumferential tubular cavity filled with at least one liquid medium. In various ring embodiments the liquid medium conducts heat, damps vibration, blocks extrusion and/or transmits hydraulic pressure. When one or more rings are used in a plunger packing, longitudinal compression of the ring(s) secondary to increased pumped fluid pressure occurs during a pressure stroke. Such compression, acting through the compliance of each ring, increases tubular cavity hydraulic pressure and causes radial ring expansion. Ring expansion is both inward toward a plunger and, simultaneously, outward toward its packing box. Inward expansion tends to seal the extrusion gap, while outward expansion increases coupling from plunger to packing box to increase vibration damping and/or heat scavenging. Periodic reduction of pumped fluid pressure tends to reverse radial ring expansion, thus reducing both frictional ring wear and heat generation.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: October 23, 2012
    Inventors: Dennis W. Gilstad, Barbara C. Gilstad
  • Patent number: 8276918
    Abstract: One or more multifunction elastomeric plunger seal rings augment a plunger packing assembly within a plunger pump packing box. Each such ring comprises a totally-enclosed circumferential tubular cavity. The cavity is filled with a dilatant liquid which transmits hydraulic pressure throughout the tubular cavity and simultaneously damps pump vibration transmitted via the packing box. Pump pressure strokes increase tubular cavity hydraulic pressure, resulting in radial ring expansion forces both inwardly toward a plunger and outwardly toward its packing box. Inward ring expansion tends to close the extrusion gap, while outward expansion force improves heat transfer from plunger to packing box. Outward expansion force also increases coupling of packing box vibration to hysteresis loss in the dilatant liquid.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: October 2, 2012
    Inventors: Barbara C. Gilstad, Dennis W. Gilstad
  • Publication number: 20120187637
    Abstract: The invention relates to a sealing ring (10) having a first sealing surface (26) arranged on the inner circumference thereof and at least one second sealing surface (13, 14) arranged on the outer circumference thereof. According to the invention, a compensation region (17, 18) that can be at least partially deformed in an elastic manner in the axial direction is arranged on at least one of the two faces of the sealing ring (10).
    Type: Application
    Filed: June 1, 2010
    Publication date: July 26, 2012
    Applicant: ROBERT BOSCH GMBH
    Inventors: Guenter Kastinger, Thomas Singler
  • Patent number: 8210542
    Abstract: One or more elastomeric multifunction rings augment a plunger packing assembly within a plunger pump packing box. Each such ring comprises a totally-enclosed circumferential tubular cavity filled with a fluid medium which transmits hydraulic pressure throughout the tubular cavity. Longitudinal ring compression secondary to pumped fluid pressure acts through the compliance of each ring to increase tubular cavity hydraulic pressure, resulting in radial ring expansion. Ring expansion is both inward toward a plunger and, simultaneously, outward toward its packing box. Inward expansion tends to seal the extrusion gap, while outward expansion improves heat transfer via the ring from plunger to packing box. Periodic reduction of pumped fluid pressure tends to reverse radial ring expansion. Thus, relatively more effective sealing and heat transfer functions occur as a pump's pressure stroke increases pumped fluid pressure.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: July 3, 2012
    Inventor: Dennis W. Gilstad
  • Patent number: 8191900
    Abstract: An oil seal (1A) has an outer member (2) fitted to a crankcase (100), an inner member (3) integrally rotatably fitted to a crankshaft (101), and a first movable lip (4) disposed in the gap (G1) formed by the outer member (2) and the inner member (3). The first movable lip (4) is disposed such that it is not in contact with the outer member (2) when rotation of the crankshaft (101) is stopped and that it is displaced in the direction to approach the outer member (2), coming into contact with the outer member (2) to close the gap (G1).
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: June 5, 2012
    Assignees: Toyota Jidosha Kabushiki Kaisha, Arai Seisakusho Co., Ltd.
    Inventors: Takao Suzuki, Sinichi Tamura, Masaki Sohda, Tetsuya Ishikawa, Takashi Umeki
  • Patent number: 8127902
    Abstract: A sealing assembly including a sealing ring made of elastomeric material and having, integrally in one piece, at least one elastically deformable, annular sealing lip, at least part of which projects axially from and radially inwards of the sealing ring, from a respective root portion adjacent to a first axial end of the sealing ring, and towards a second axial end, opposite the first, of the sealing ring; and an annular reinforcing structure made of material which is elastically deformable but relatively much more rigid than the elastomeric material of the sealing ring and relative lip, and at least partly embedded in the sealing ring; wherein the reinforcing structure extends at least partly in an axial direction, at least partly alongside but on the opposite side to the sealing lip; the sealing lip being designed to define, when undeformed, a predetermined radial clearance between itself and a radially inner lateral wall of the sealing ring.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: March 6, 2012
    Assignee: Aktiebolaget KSF
    Inventor: Roberto Pasino
  • Patent number: 8011673
    Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a base portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the base portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The stiffening bead reduces the seal's propensity for “bell mouthing” while the axially extending barrel portion provides improved shaft followability for the dynamic seal.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: September 6, 2011
    Assignee: Freudenberg-NOK General Partnership
    Inventor: Alexander Berdichevsky
  • Publication number: 20110197756
    Abstract: Conventional wiper arrangements with cut rings suffer from unavoidable leakage and, in particular in an embodiment as metallic wiper ring with a sharp wiping edge, scratch on the surface of the piston rod which can be damaged in this manner. In order to eliminate these problems, a wiper arrangement is proposed in which the radially inner circumferential surfaces 6, 7 of the wiper ring 2 and the cover ring 3 form a common radially inner wiping surface 10 and on the cover ring 3 or the on the wiper ring 2, an intake surface 8 is provided which is adjacent to the wiping surface 10 and which is inclined radially outwardly at an angle ?, preferably between 2° and 15°, with respect to the wiping surface 10.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 18, 2011
    Inventors: Christian Hold, Tino Lindner-Silwester, Martin Lagler
  • Patent number: 7914209
    Abstract: A bearing seal includes an outer seal easily displaceable in the radial direction, an inner ring as a ring-shaped rigid portion not extendable in the radial direction, an inner seal having a seal lip, and an outer ring arranged on the outer peripheral portion of the outer seal, in which the spring constant of the inner seal is set to be larger than the spring constant of the outer seal. The sealing performance between the inner seal and the pin is ensured by using the ring-shaped rigid portion as a boundary. When the pin is displaced in the radial direction, the ring-shaped rigid portion is integrally displaced with the pin via the inner seal, and the displacement of the ring-shaped rigid portion can be absorbed by the outer seal.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: March 29, 2011
    Assignee: Komatsu Ltd.
    Inventors: Hiroshi Yamamoto, Ryuusuke Komura, Jun Maruyama
  • Patent number: 7854432
    Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a base portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the base portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The stiffening bead reduces the seal's propensity for “bell mouthing” while the axially extending barrel portion provides improved shaft followability for the dynamic seal.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: December 21, 2010
    Assignee: Freudenberg-NOK General Partnership
    Inventor: Alexander Berdichevsky
  • Patent number: 7828299
    Abstract: Systems and methods associated with a fluid-activated shaft seal are provided. The systems, which feature multiple components, include a support component defining an exterior surface, a carrier component including an interior surface to slideably engage the exterior surface of the support component, and a seal disposed relative to the carrier component. The seal includes a lip portion and a fluid-responsive gel material that expands when exposed to a fluid to urge the lip portion towards or into contact with a shaft. The gel material contracts in the absence of the fluid to form or increase the size of a gap between the shaft and the lip portion. Methods of assembling and installing such a system are also described.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: November 9, 2010
    Assignee: MIDE Technology Corporation
    Inventors: Marthinus van Schoor, David Gilbert, Andrew Cutler, Steven Klepper
  • Publication number: 20100237566
    Abstract: Seal assemblies for sealing around a moveable shaft, such as rotary or reciprocating, or static, are described. The seal assemblies prevent the passage of lubricant or fluid from a relatively high pressure area on a first side of the seal to a relatively low pressure area on a second side of the seal. In some embodiments, these seals are energized by energizers, such as circular springs or canted springs, to keep the seal in contact with the moveable shaft. The seals have primary and secondary seals. The secondary seal provides initial moderate sealing against abrasive particles or contaminants to reduce the exposure and wear of the primary seal.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Inventors: Pete Balsells, Mike Foster, Majid Ghasiri, Sid Niknezhad
  • Patent number: 7748907
    Abstract: A bearing seal includes an outer seal easily displaceable in the radial direction, an inner ring as a ring-shaped rigid portion not extendable in the radial direction, an inner seal having a seal lip, and an outer ring arranged on the outer peripheral portion of the outer seal, in which the spring constant of the inner seal is set to be larger than the spring constant of the outer seal. The sealing performance between the inner seal and the pin is ensured by using the ring-shaped rigid portion as a boundary. When the pin is displaced in the radial direction, the ring-shaped rigid portion is integrally displaced with the pin via the inner seal, and the displacement of the ring-shaped rigid portion can be absorbed by the outer seal.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: July 6, 2010
    Assignee: Komatsu Ltd.
    Inventors: Hiroshi Yamamoto, Ryuusuke Komura, Jun Maruyama
  • Publication number: 20100156051
    Abstract: A dust seal structure of an internal mixer including a casing having a mixing chamber defined therein, and a rotor rotating in the mixing chamber for kneading a material, which is charged into the mixing chamber to be kneaded there, comprises a ring-shaped cylinder fitted to a rotor shaft of the rotor and mounted on a peripheral edge of an opening portion of the casing through which the rotor shaft passes, the cylinder being located at the peripheral edge of the opening portion of the casing, and being adapted to urge a ring-shaped sealing member fitted on the rotor shaft in a direction of the rotor shaft to inhibit leakage of the kneading material from the mixing chamber.
    Type: Application
    Filed: October 27, 2009
    Publication date: June 24, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi MORIBE, Hiroki TATEMI, Shuichi HANADA, Mitsuru MORITA, Yoshikazu NISHIHARA
  • Publication number: 20100148450
    Abstract: The invention pertains to a seal with at least one sealing lip that can be pressed against a surface to be sealed of a machine element to be sealed in the radial direction by means of an annular power transmission element. The power transmission element has an effective diameter that can be varied on both sides in the radial direction with the aid of an adjusting mechanism.
    Type: Application
    Filed: December 17, 2009
    Publication date: June 17, 2010
    Applicant: Carl Freudenberg KG
    Inventors: Benno Schmied, Kristian Müller-Niehuss, Thomas Schauber
  • Publication number: 20100102517
    Abstract: A system for enhanced sealing against intrusion of moisture and other contaminants for medical/dental handpieces having rotating or other moving elements driven by a motor within the handpiece. The enhanced sealing includes tandem seals on stepped diameters to provide additional flow pathway impediments. The tandem seals preferably include spring seals that are positioned in opposite directions to provide enhanced sealing against pressures in two different directions that occur during the pressurization and vacuum cycles of an autoclaving process. Additional enhancements include the use of annular sealing rings with x-shaped cross sections.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Inventors: Ajay Kumar, Kevin J. Stanton
  • Patent number: 7686308
    Abstract: Systems and methods associated with a fluid-activated shaft seal are provided. The system includes a housing and a seal disposed relative to the housing. The method reduces flow of a fluid between the shaft and the housing. The method involves installing the housing in an opening relative to the shaft and locating the seal relative to the housing. The seal includes a gel material that expands when exposed to a fluid. The seal reduces flow of the fluid through a gap between the housing and the shaft. Advantages of the system and method include reduced wear to the seal due to friction because the seal does not engage the shaft in the absence of a fluid. The seal engages the shaft in the presence of a fluid. Sealing quality is improved by increasing the pressure differential acting on the gel material. In some embodiments, the seal includes a lip portion.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 30, 2010
    Assignee: MIDE Technology Corporation
    Inventor: Marthinus C. Van Schoor
  • Publication number: 20100052267
    Abstract: A sealing assembly for a shaft includes a sealing component, a first ring, a second ring, and at least one energizer. The first ring is annularly disposed about the shaft, the first ring having at least one first protuberance interfittable with the sealing component. The second ring is annularly disposed about the shaft in facing opposition to the first ring, the second ring having at least one second protuberance interfittable with the sealing component. The at least one energizer energizes the seal component, the at least one energizer being adjacent the at least one first protuberance or the at least one second protuberance.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 4, 2010
    Inventors: Larry J. Castleman, Gregory D. Jones, Brian Bowen
  • Patent number: 7640841
    Abstract: A seal includes a seal body forming an annular sealing surface. The annular sealing surface includes an annular ridge protruding substantially radially from the annular sealing surface. The seal body includes an annular cavity. The seal also includes first and second annular springs located adjacent to each other in the annular cavity.
    Type: Grant
    Filed: January 2, 2007
    Date of Patent: January 5, 2010
    Assignee: Saint-Gobain Performance Plastics Corporation
    Inventors: Jonathan An, Robert Thomas Racicot
  • Publication number: 20090230630
    Abstract: To provide such a resin lip type seal (1) installed in an annular clearance between a housing (12) and a reciprocating shaft (13) that shapes of tip parts (31, 41, 61) of lips (3, 4, 6) fitted to a mating member (12 or 13) are not changed with elapse of time and the tip parts (31, 41, 61) exercise, in a well-balanced state, both a function for securing low leak, which is the feature of sharp shape, and a function for securing oil film thickness, which is the feature of round-shape, flat surfaces (21) with axial widths (W) having edge parts (22) are formed at the tip parts (31, 41, 61), and the axial widths (W) are determined to be 5 to 30% of the overall axial widths (A) of the lips (3, 4, 6).
    Type: Application
    Filed: May 19, 2006
    Publication date: September 17, 2009
    Applicant: NOK Corporation
    Inventors: Yosuke Kondo, Yasuhiro Suzuki
  • Patent number: 7565913
    Abstract: The present invention is directed to a metal valve stem seal and sealing system comprising a valve body; a metal valve stem housed within the valve body; a bonnet member housed within the valve body; a U-shaped metal stem gasket positioned between the metal valve stem and the bonnet member, wherein the gasket has a first lip member and a second lip member each having an interior surface and an exterior surface; a metal wedge ring fitted between the first and second lip members; and, at least one metal energizing spring adjacent the wedge ring, wherein the metal energizing spring applies a sufficient force to the wedge ring to cause the wedge ring to apply a sufficient contact pressure to the first and second lip members to form a seal between the gasket and the metal valve stem and to form a seal between the gasket and the bonnet member.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: July 28, 2009
    Assignee: PetrolValves, LLC
    Inventor: Roberto Pozzati