Peripheral Radially Sealing Flexible Projection (e.g., Lip Seal, Etc.) Patents (Class 277/394)
  • Patent number: 11365807
    Abstract: A sealing apparatus includes a reinforcing ring, an elastic body portion formed of an elastic body having conductivity, and a conductive grease. The elastic body portion includes a base portion, a lip portion which extends from the base portion, and a tension force applying member which is an elastic member in an annular shape. The tension force applying member is mounted on an outer peripheral side of the lip portion at a lip tip end portion to apply a tension force which presses a lip contact end against an outer peripheral surface of a shaft. The conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion which faces an inner periphery side.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: June 21, 2022
    Assignee: NOK CORPORATION
    Inventors: Takuya Ito, Masayuki Tanida
  • Patent number: 11221072
    Abstract: An arrangement structure for a seal member includes: a first member having a first mating surface and provided with a groove portion; a second member having a second mating surface, and configured to move relatively to the first member; and an annular seal member fitted into the groove portion, providing sealing between the first member and the second member, and serving as a partition between an atmosphere-side space and a pressurized-side space. The seal member includes a plurality of first protruding portions protruding toward the second mating surface and aligned from the atmosphere-side space toward the pressurized-side space. The seal member has such a shape that, in a state of not being fitted into the groove portion, a protrusion height of the first protruding portion increases in stages from the first protruding portion arranged close to the pressurized-side space toward the first protruding portion arranged close to the atmosphere-side space.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: January 11, 2022
    Assignee: VALQUA, LTD.
    Inventors: Katsuhisa Umeda, Akira Ueda, Mitsuru Minami, Akihiro Nagano
  • Patent number: 10435211
    Abstract: A package seal for sealing engagement between a closure and a container, and including an elastomeric seal ring with a sealing portion, and a plastic projection coupled to the seal ring.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: October 8, 2019
    Assignee: Owens-Brockway Glass Container Inc.
    Inventor: Brian J. Chisholm
  • Patent number: 10378653
    Abstract: A valve for metering highly pressurized fluid, having an inlet connector that can be placed into a connection socket of a fluid supply line, and a sealing assembly situated on the inlet connector, the sealing assembly having an elastically deformable sealing ring and a support ring made of plastic, which sealing assembly is supported on a radial support shoulder present on the inlet connector and seals against the connection socket. To prevent radial gaps between the support ring on the one hand and the inlet connector and/or the connection socket on the other hand, into which gaps the sealing ring extrudes under high pressure and becomes damaged, the support ring situated between the sealing ring and the support shoulder is made of an elastically deformable plastic material.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: August 13, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Thilo Beckmann, Stefanie Capek, Guido Pilgram, Ralf Kromer
  • Patent number: 10240677
    Abstract: A gasket for sealing a compartment between rotating and fixed members. The gasket has a first ring; a second ring radially more external than the first ring; a first annular elastomeric element carried by the first ring and defining at least a first annular sealing lip cooperating with the second ring to counter the passage of external contaminants inside the compartment; a second annular elastomeric element carried by the second ring and defining at least a second annular sealing lip cooperating with the first ring to counter the passage of lubricant to the outside; a third ring coupled to the second ring and extending from this latter towards the axis of the gasket; and at least a third annular sealing lip, overhangingly projecting from the first elastomeric element and cooperating with the third ring to counter the passage of external contaminants from the outside towards the first sealing lip.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: March 26, 2019
    Assignee: FREUDENBERG SEALING TECHNOLOGIES S.A.S. DI EXTERNA ITALIA S.R.L.U
    Inventors: Pasquale Angiulli, Luca Breusa, Massimo Barban, Stefano Miletto, Maurizio Buro, Andrea Berta
  • Patent number: 9663345
    Abstract: A multiple pump system is disclosed. The multiple pump system may include a fluid tank and a multiple pump vessel connected to the fluid tank. The multiple pump vessel may include at least one first pump and at least one second pump located therein. In addition, the at least one first pump may be configured to dispense a fluid from the fluid tank at a first pressure, and the at least one second pump may be configured to dispense the fluid from the fluid tank at a second pressure. The first pressure may be different from the second pressure, such that the at least one first pump may be configured to dispense liquefied natural gas, and the at least one second pump may be configured to dispense compressed natural gas.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 30, 2017
    Assignee: GP STRATEGIES CORPORATION
    Inventor: Michael Mackey
  • Patent number: 9587501
    Abstract: A seal ring assembly for use with a rotary machine that includes an axis of rotation includes a seal housing comprising a secondary sealing surface and a secondary seal assembly coupled to the seal housing. The secondary seal assembly includes a seal ring coupled to the seal housing, wherein the seal ring is configured to form a secondary seal with the secondary sealing surface. The secondary seal assembly also includes at least one protection ring positioned upstream from the seal ring. The secondary seal assembly is configured to be biased along the axis such that biasing the at least one protection ring facilitates removing debris from at least a portion of the secondary sealing surface over which the seal ring travels during biasing.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: March 7, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Rahul Anil Bidkar, Karimulla Shaik Sha, Azam Mihir Thatte
  • Publication number: 20150130138
    Abstract: An aspirating face seal for use with a rotary machine includes a rotating seal ring including a radially outer surface that includes an oblique portion. A stationary seal ring is coupled proximate the rotating seal ring such that a first gap is defined therebetween. The stationary seal ring is movable along a centerline axis of the rotary machine between an open position and a sealed position, and includes an extension member that extends across the first gap. An auxiliary seal includes at least one seal tooth that includes a seal tooth tip. The at least one seal tooth extends radially inward from the extension member such that a second gap is defined between the seal tooth tip and the oblique portion.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Norman Arnold Turnquist, Michael Dennis Mack, Rahul Anil Bidkar, Azam Mihir Thatte
  • Publication number: 20140239598
    Abstract: A rotating pumping apparatus is provided which may be employed in an automotive brake system. The rotating pumping apparatus includes a sealing member and an oil seal which are disposed around a pump drive shaft, and lubricating grease disposed between the oil seal and the pump drive shaft. The sealing member is made up of a resinous ring and a rubber cup. The sealing member has formed therein a labyrinthine flow path which extends from the resinous ring to the rubber cup. The labyrinthine flow path is designed to permit fluid to flow therethrough and create the resistance to flow of the lubricating grease to avoid leakage of the grease outside the sealing member.
    Type: Application
    Filed: February 21, 2014
    Publication date: August 28, 2014
    Applicants: ADVICS CO., LTD., DENSO CORPORATION
    Inventors: Yoshitake Hisada, Takeshi Fuchida
  • Patent number: 8764018
    Abstract: A seal arrangement has a mechanical shaft seal with an annular counter member and a slide ring each having sliding surfaces that rest against one another and define sealing gap. The sealing gap has at least one sealing lip correlated therewith. The sealing lip is arranged downstream or upstream of the sealing gap.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: July 1, 2014
    Assignee: KACO GmbH & Co. KG
    Inventor: Markus Schwerdtfeger
  • Publication number: 20140175861
    Abstract: An outboard sealing system cooperates with components of a heavy-duty vehicle wheel end assembly to retain lubricant in the assembly. The sealing system includes a seal that is disposed axially between an outboard bearing and a hubcap of a wheel end assembly. The seal also extends radially between an axle spindle nut and a surface of a bore formed in the hub of the wheel end assembly. The seal forms a barrier between the outboard bearing and the hubcap to reduce a flow of lubricant from a hub cavity into the hubcap. The sealing system retains lubricant in the wheel end assembly, prevents contaminants from entering the wheel end assembly, and retains the relative position of the outboard bearing in the hub during servicing. The sealing system preferably includes an additional barrier that reduces corrosion at the interface of the hubcap and an outboard face of the hub.
    Type: Application
    Filed: December 18, 2013
    Publication date: June 26, 2014
    Applicant: Hendrickson USA, L.L.C.
    Inventors: Jay D. White, Dhawal Dharaiya
  • Patent number: 8511689
    Abstract: A shaft sealing apparatus of including a first mechanical seal having a mating ring disposed at the sealed fluid side and which rotates along with a shaft as the inner circumference side thereof is fixed to the shaft side, and a sealing ring disposed at the air side with respect to the mating ring and is slidable against the mating ring and which does not rotate along with the shaft. An annular space in which the sealed fluid exists is formed at the outer circumferential face side of the first mechanical seal. The shaft sealing apparatus further includes a protection cover disposed adjacent to the sealed fluid side of the seal cover in a state of being sealed with the seal cover and with the first mechanical seal respectively by an O-ring so as to suppress exposure of the seal cover to the sealed fluid.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 20, 2013
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Hidekazu Takahashi
  • Patent number: 8057202
    Abstract: A scroll compressor including a non-orbiting and an orbiting scroll member having mating involute wraps extending therefrom. In one exemplary embodiment, at least one of the non-orbiting and orbiting scroll members includes an inner wall forming a groove in an end of the involute wrap and extending substantially entirely along the length thereof. Positioned within the groove is a tip seal having outwardly extending projections configured to engage the inner walls of the involute wrap along at least a portion thereof. In one exemplary embodiment, the tip seal has a length that is less than the length of the groove. As a result, a gap is formed at the innermost portion of the involute wrap between the end of the groove and the end of the tip seal.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: November 15, 2011
    Assignee: Tecumseh Products Company
    Inventor: David K. Haller
  • Publication number: 20100072709
    Abstract: A seal assembly having a seal bumper wall with a series of pyramid shaped formations lying on the bumper wall. The formations cause their apex portion to wear down rapidly in use, while the remainder of the pyramids remain and act as slingers and/or produce a convection effect to reduce temperature along the sealed area. In another embodiment, there are two each pyramid shaped formations located on each of several thrust bumpers, which are held in position by a retainer.
    Type: Application
    Filed: September 28, 2009
    Publication date: March 25, 2010
    Applicant: SKF USA INC.
    Inventor: Linas L. Maskaliunas
  • Patent number: 7549647
    Abstract: The invention relates to a sealing device for roller bearings, comprising a journal seal (4), which is arranged upstream on the roller-ball side of the annular seal (8) which is connected in a rigid manner to an annular projection (7) of the bearing housing (5). The sealing lip (18) of the sealing device is applied to the front side (10) of the roller (1) by means of a sealing contact. The aim of the invention is to improve the sealing device in such a manner that the sealing lip of the annular seal is barely impinged upon by cooling means mixed by impurities, making it long lasting and ensuring that no undesired water can penetrate into said outlet.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: June 23, 2009
    Assignee: SMS Demag AG
    Inventors: Konrad Roeingh, Karl Keller, Rolf Hücker
  • Publication number: 20080237992
    Abstract: A pair of pivoting parts are held together with a pin, with a first part, such as a rod end of a hydraulic actuator, positioned between two flanges of a bracket, with the flanges having surfaces mating with sides surfaces of the rod end. A seal is placed in each of a pair of recesses on the opposite side surfaces of the rod end to provide an annular seal around the surface of the pin as the parts pivot, and also having a flange forming a side seal that seats on one of the mating surfaces of the bracket at a location spaced outwardly from the pin and extending annularly around the pin. The seal portion engaging the pin is spaced inwardly from the respective side surface of the bracket, and the outer annular lip seals a space surrounding the pin to form a pocket to receive grease that is used to lubricate the pin relative to the rod end.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Applicant: Clark Equipment Company
    Inventors: Knute K. Brock, William C. Shelbourn, Robert E. Purvis, Timothy T. O'Brien
  • Patent number: 7296800
    Abstract: A seal device that includes a seal portion protruding from a resilient body member in a common direction with a seal lip member. The seal portion being shorter in length and having a thickness that is thinner than the lip seal member. A gap is defined between an action diameter surface of the seal lip member and one of either a retainer portion or a ring member, wherein the seal portion contacts the other one of the retainer portion or ring member. A pressure receiving groove is defined between the seal lip member and the seal portion, and is in communication with the gap.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: November 20, 2007
    Assignees: Eagle Industry Co., Ltd., Shin Caterpillar Mitsubishi Ltd.
    Inventors: Hajime Tsuboi, Toshiya Fuke, Norio Fukushima
  • Patent number: 7090221
    Abstract: A seal contact surface of a seal lip member and a protruding lip member of an end face seal are separated from each other and frictional heat generated at the seal lip member due to sliding motion is prevented from being transferred to the end face seal for softening the material, thus the seal capability is improved. A protruding lip member (3) provides a seal by making an angle to a seal surface (11B) of a seal ring (11) in radially outward a direction and a lip portion (15A) of a seal lip member (15) is disposed inside an inner diameter surface (11A) of the seal ring (11) for effecting a seal against a sealing object fluid.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: August 15, 2006
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Shingo Matsui, Yoshiaki Takigahira
  • Patent number: 7080510
    Abstract: An exhaust gas sealing system for a turbocharger includes a control valve for controlling a flow of an exhaust gas in a turbine housing, a shaft extending to an outside of the turbine housing through a bearing bore provided on the turbine housing, one end of the shaft being fixed to the control valve, and a sealing member for preventing the exhaust gas from leaking to the outside of the turbine housing through a gap formed between the bearing bore and the shaft. The sealing member includes a through-hole forming a gap with the shaft smaller than a gap formed between the bearing bore and the shaft. One side of the sealing member is pressed against a sealing face and is provided within a cavity formed in the turbine housing and including the sealing face on a peripheral side of the shaft.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: July 25, 2006
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Hiromitsu Ishihara, Kazunari Adachi, Takashi Sakumoto, Shinji Kono
  • Patent number: 6921078
    Abstract: Slit ring seal, especially running gear seal, consisting of an angle-shaped slip and/or opposing ring with a circumferential surface designed to accent a ring-shaped, approximately cross-sectional plate-spring shaped sealing body, where the sealing body, as needed, includes a secondary seal directed toward the area of the sealing shaft of the slip, and/or opposing ring, and supports itself with segment areas of its outer circumferential surface on corresponding surface areas of an installation bore, where a ring-shaped securing element is provided radially between the outer circumferential surface of the slip and/or opposing ring and the installation bore, contacting the sealing body in the installed condition.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: July 26, 2005
    Assignee: Federal-Mogul Friedberg, GmbH
    Inventor: Hans-Henning Zutz
  • Patent number: 6866271
    Abstract: A sealing device for use with a drive shaft of a water vessel. The sealing device comprises a housing for a seal and bearing, a compression ring, a lip seal flange attachment and a diaphragm for tracking the movement of the shaft. The diaphragm is made of a resilient, flexible material and is operatively connected to the seal housing. In operation, the diaphragm tracks the motion of the drive shaft so that the drive shaft may move freely in the hull of the vessel. The diaphragm allows the rigid seal housing to also move in response to any axial, lateral or circular-axial (wobble-like) movement of the shaft so that a constant seal around the shaft is provided.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: March 15, 2005
    Assignee: Duramax Marine, LLC
    Inventor: George MacDonald
  • Publication number: 20040113366
    Abstract: A lip-type shaft seal is made of elastic material with a Shore A hardness of ≦75, includes a radial sealing lip, which has a sealing edge to bear against a rotating component and terminates in a axial sealing lip, which has a sealing edge to rests in installed state against a contact surface. The axial sealing lip extends at an angle of ≧35° in relation to a symmetry axis of the shaft seal, when the axial sealing lip has not been installed yet and is under no tension, and extends from the sealing edge of the radial sealing lip at a length of ≧1.4 mm. When the shaft seal is installed, the axial sealing lip rests against the contact surface at an axial overlap of 0.05 to 0.55 mm.
    Type: Application
    Filed: October 2, 2003
    Publication date: June 17, 2004
    Applicant: INA-SCHAEFFLER KG
    Inventors: Elmar Mause, Harald Peschke, Wolfram Kruhoffer, Thomas Traudt, Horst Krischer
  • Patent number: 6712580
    Abstract: A structure of a water pump is provided without increasing the cost thereof, or without enlarging the size to improve the durability of the water pump. A seal apparatus having a seal ring 13 and a slinger 14 in combination to prevent foreign matter from progressing into the rolling bearing 6a. The amount of compression &dgr; of the second seal lip 23, which occurs when the tip edge of the second seal lip 23 of the seal ring 13 comes in contact with the outer peripheral surface of the outer-diameter-side cylindrical section 26 that is formed at the outer peripheral edge of the slinger 14, is at least {fraction (1/10)} and up to {fraction (7/10)} the height of the second seal lip 23 in the free state. In addition, the roughness of a portion of the outer peripheral surface of the outer-diameter-side cylindrical section 26 which the tip edge of the second seal lip 23 comes in sliding contact with is from 0.2 &mgr;m to 2.0 &mgr;m in the arithmetic mean Ra, or is from 0.8 &mgr;m to 8.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: March 30, 2004
    Assignee: NSK Ltd.
    Inventor: Masamichi Iketani
  • Publication number: 20040007821
    Abstract: Advantageous seal systems (1500) are provided that include a barrier member movable relative (1504) to a shaft (1550) to allow sequential engagement of resilent seal members (1506), e.g., lip seals, with the shaft. Movement of the barrier member (1504) may be effected manually or through introduction of pressurized fluid to effect piston-like movement. The disclosed seal assemblies may include an automatic leak detector and may utilize such leak detection to effectuate automatic movement of the barrier member. The barrier member may be moved relative to the shaft while the shalt is in movement, e.g., rotating or reciprocating, thereby permitting seal maintenance without interruption in operation. As seal members are sequentially brought into sealing engagement with the shaft, the previously engaged seal members contribute to the sealing performance of the seal assembly, although no longer effective to establish a stand-alone seal with the shaft.
    Type: Application
    Filed: December 20, 2002
    Publication date: January 15, 2004
    Inventor: Thomas W. Ramsay
  • Publication number: 20040004326
    Abstract: A sealing device comprises a sealing member brought into contact with a contact surface so as to be slidable in a predetermined sliding direction. The sealing member comprises a sliding contact portion containing a high polymer material to be brought into sliding contact with the contact surface. A plurality of recessed or protruding streaks, which are independent of one another, are provided side by side so as to constitute a column on a surface of the sliding contact portion.
    Type: Application
    Filed: June 27, 2003
    Publication date: January 8, 2004
    Inventor: Liming Lou
  • Publication number: 20030209858
    Abstract: Sealing device (1) for rolling contact bearings, the device (1) presenting two rigid shields (3, 4) which face each other in order to form a labyrinth opening (13) which is radially delimited towards the inside by a lateral surface (12), and by a encoder wheel (2) which is supported by a first shield (3) of the said two shields (3, 4) and which is arranged in such a way as to be radially aligned to the labyrinth opening (13); at least one sealing lip (20) being situated inside the labyrinth opening (13), and extending towards the said first shield (3) starting from a second shield (4) of the said two shields (3, 4) in order to face the said lateral surface (12).
    Type: Application
    Filed: March 10, 2003
    Publication date: November 13, 2003
    Applicant: SKF INDUSTRIE S.p.A.
    Inventors: Carlo Maldera, Angelo Vignotto, Stefano Bertalmio
  • Publication number: 20030189293
    Abstract: A sealing ring for a shaft (3), characterised by a sealing lip (1) made of an elastomer material is flexionally dimensioned with a flexional elasticity which is sufficient for pressing a sealing section (10) of the sealing lip (1) against the surface of the shaft (3). The sealing section (11) of the scaling lip (1) is disposed with a cylindrical part of a given length (L) on the periphery of the shaft (3). The sealing lip (1) is provided with a thread (5) at least along the above-mentioned length on the shaft side, whereby a discharged medium is transported back to the sealing area (M) when the shaft (3) is rotated. By dimensioning accordingly, it is possible to dispense with an additional spring for pressing a sealing lip (1) against the shaft (3). The thread (5) is also sealed off from the surrounding area (U) in order to prevent the medium to be sealed from flowing out when the shaft (3) is not in operation.
    Type: Application
    Filed: March 14, 2003
    Publication date: October 9, 2003
    Inventor: Rolf Johnen
  • Publication number: 20030173745
    Abstract: A seal, especially for shafts movable in a translational direction, has at least one static sealing area and at least one dynamic sealing area and another sealing point outside of the dynamic sealing area. The other sealing point is formed by at least two elements functionally connected to each other, one of which at least one is stationary and at least one other is movable, following a shaft stroke.
    Type: Application
    Filed: February 13, 2003
    Publication date: September 18, 2003
    Inventor: John Kapcoe
  • Publication number: 20030173744
    Abstract: A sealing device for use with a drive shaft of a water vessel. The sealing device comprises a housing for a seal and bearing, a compression ring, a lip seal flange attachment and a diaphragm for tracking the movement of the shaft. The diaphragm is made of a resilient, flexible material and is operatively connected to the seal housing. In operation, the diaphragm tracks the motion of the drive shaft so that the drive shaft may move freely in the hull of the vessel. The diaphragm allows the rigid seal housing to also move in response to any axial, lateral or circular-axial (wobble-like) movement of the shaft so that a constant seal around the shaft is provided.
    Type: Application
    Filed: February 5, 2003
    Publication date: September 18, 2003
    Applicant: Duramax Marine, LLC
    Inventor: George MacDonald
  • Patent number: 6581939
    Abstract: A bearing end cap having a circular mounting surface, a sidewall adjacent to the mounting surface, a seal groove positioned in the mounting surface, and an integrated seal positioned in the seal groove.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: June 24, 2003
    Assignee: Emerson Power Transmission Manufacturing, L.P.
    Inventors: Adam M. Theros, James A. Parejko
  • Patent number: 6494459
    Abstract: An axial face seal, in particular a running gear seal, consists of an angular sliding ring and/or counter-ring with a circumferential surface for accommodating a ring-shaped sealing member with approximately plate-shaped cross section. The sealing member contains a secondary seal guided in the area of the sealing leg, wherein the sealing leg of the sliding ring and/or counter-ring is provided on the ring backside with an axial projection extending in the direction of the sealing member. The secondary seal in the non-assembled state is positioned at a radial distance to the sealing leg or the projection and has at least in part a larger diameter than the sealing member. At least the free end of the secondary seal can be positioned with radial compression on the sealing leg or the projection with the aid of a component that accommodates the sealing member.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: December 17, 2002
    Assignee: Federal-Mogul Burscheid GmbH
    Inventor: Hans-Henning Zutz
  • Patent number: 6485256
    Abstract: A seal apparatus is comprised of a seal ring 13 and a singer 14 in combination to prevent foreign matter from progressing into the rolling bearing 6a. The amount of compression &dgr; of the second seal lip 23, which occurs when the tip edge of the second seal lip 23 of the seal ring 13 comes in contact with the outside surface of the singer 14, is at least {fraction (1/10)}and up to {fraction (7/10)}the height of the second seal lip 23 in the free state. In addition, the roughness of a portion of the outside surface of the singer 14 which the tip edge of the second seal lip 23 comes in sliding contact with is from 0.2&mgr;m to 2.0&mgr;m in the arithmetic mean Ra, or is from 0.8 &mgr;m to 8.0 &mgr;m in the maximum height Ry. Consequently, a structure of a water pump is provided without increasing the cost thereof, or without enlarging the size to improve the durability of the water pump.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: November 26, 2002
    Assignee: NSK Ltd.
    Inventor: Masamichi Iketani
  • Patent number: 6375195
    Abstract: The present invention relates to a sealing assembly for use in a rolling mill in which a reliable and rigid mounting surface on the seal end plate and a detachable seal retaining plate improves the efficiency of the coolant seal without need of separate fasteners for fastening the coolant seal to the seal end plate. Moreover when the seal retaining plate has worn it may be readily removed and replaced cheaply.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: April 23, 2002
    Assignee: SMS Demag AG
    Inventor: Michael Robotham
  • Patent number: 6357754
    Abstract: The sealing arrangement for a bearing bushing includes a reinforced seal (2) which is arranged in force-fitting manner against the inner wall (4) of the bearing bushing (1). The reinforcement (3) of the seal (2) forms a radially inwardly directed arm (14) for attachment of a rotary shaft seal (8) which is disposed between the arm (14) and the rolling bodies (7). The seal (2) is further provided with a sealing lip (15) which faces away from the rotary shaft seal (8) and is supported by a sealing element (5). The sealing element (5) assumes the function of a protective cap and of anterior seal and includes a reinforcement ring (16) having an arm (17) circumscribing an end zone (19) of the bearing bushing (1). A radially inwardly directed flange (18) of the reinforcement ring (16) is rubberized on an end face. The rubber packing (22) further circumscribes the free end of the flange (18) and is secured in fixed rotative engagement to the pin (6).
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: March 19, 2002
    Assignee: INA Wälzlager Schaeffler Ohg
    Inventors: Guido Rieder, Siegfried Götz, Manfred Würch, Martin Kruppa
  • Patent number: 6325175
    Abstract: In order to improve a compressor for refrigerant, comprising a housing, at least one refrigerant-compressing element arranged in the housing, a shaft which has a section extending in the housing and driving the refrigerant-compressing element, a section passing through a wall of the housing and a drive section projecting out of the housing as well as a sealing arrangement effective between the section of the shaft passing through the wall and the housing and having a slide ring seal and an outer sealing ring, between which an oil receiving chamber is arranged, from which oil can be discharged via an oil outlet, in such a manner that, on the one hand, as little oil as possible leaks out and, on the other hand, as good a shut-off as possible in relation to the entry of air can be achieved it is suggested that an oil collecting area of the oil receiving chamber communicate via a siphon arrangement with an ascending channel which leads to an outlet for the oil.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: December 4, 2001
    Assignee: Bitzer Kuehlmaschinenbau GmbH
    Inventors: Guenter Dittrich, Volker Pollrich
  • Patent number: 6308959
    Abstract: An elastic sealing element in the form of bellows, which is used to seal the contact surface between at least two components movable in relation to one another is described, which has low-elasticity contact zones as well as a deformation zone whose elasticity is higher than that of the contact zones, wherein the said deformation zone defines a chamber for accommodating lubricants on its inner side facing the movable components. An overpressure relief means (14) is arranged at least in the area of one of the two low-elasticity contact zones (6 or 7). The overpressure relief means (14) has at least one relief opening (15) connecting the lubricant chamber (11) with the outside of the sealing element (1) and a closing element (16) covering the said relief opening. The closing element (16) is in turn made in one piece with the sealing element (1) and closes the relief opening (15) up to an overpressure limit in the lubricant chamber (11) due to the intrinsic elasticity of the material of the sealing element.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: October 30, 2001
    Assignee: ZF Lemförder Metallwaren AG
    Inventors: Dirk Sokolihs, Uwe Petersen
  • Patent number: 6279914
    Abstract: The present invention relates to a lip-type seal of the outer periphery rubber type having a stationary sealing portion made of rubber on the outer periphery of a reinforcing ring. In view of the fact that there is produced a gap corresponding to the rubber thickness of the stationary sealing portion between the outer periphery of the reinforcing ring and inner periphery of the seal attachment hole, the invention has an object to permit certain supporting of the reinforcing ring by means of a stop functional member by expanding the engagement area engaging with the stop functional member.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: August 28, 2001
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Satoshi Yamanaka, Yasuhiro Ikeda, Shinobu Munekata
  • Patent number: 6254102
    Abstract: A seal device for creating a seal between a rotatable shaft and a stationary member. The seal device includes a seal member having a generally annular body including a generally cylindrical inner wall forming a bore that extends through the body and a sealing surface adapted to rotatably and sealingly engage the stationary member. The body includes a generally annular flexible finger seal member having a base attached to the body and a generally circular peripheral tip that defines an aperture. The bore of the seal member and the aperture of the finger seal member are adapted to receive the shaft such that the tip of the finger seal member is in static sealing engagement with the shaft. A coupling member is adapted to attach the seal member to the shaft for conjoint rotation therewith and to resiliently bias the sealing surface of the seal member into rotating sealing engagement with the stationary member.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: July 3, 2001
    Assignee: McNish Corporation
    Inventor: Jack L. Vicory, Sr.
  • Patent number: 6209879
    Abstract: A sealing apparatus has a metal ring having a cylindrical portion and an inward flange portion bending from the open-air side end of the cylindrical portion radially inward; a first sealing member formed integral with the metal ring, and having a first rubber-like sealing lip, and a flange-shaped interposed portion held between the inward flange position of the metal ring and the radial portion of the first sealing member. A second sealing member made of a resin material, extends from the inside-diameter end of the interposed portion axially toward the sealing liquid side, and is located in a gap between the open-air side surface of the first sealing lip and a rotary member, having the inner periphery thereof in slidable close contact with the surface of the rotary member, and regulates radial deformation of the first sealing lip. A screw pumping portion is provided to transport the liquid between the sliding surfaces to the sealing liquid side on rotation of the rotary member.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: April 3, 2001
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Koichi Mizunoya, Ken Yoshikawa, Satoshi Yamanaka, Tatuhiko Watanabe, Shinobu Munekata, Yasuhiro Ikeda
  • Patent number: 6173963
    Abstract: A sealing assembly for an inlet valve of a power nailer includes a fixed frame and a movable member which has a tubular portion movably inserted through the central hole of the fixed frame and is biased by a spring. The movable member is connected to the cylinder so as to push the piston of the cylinder. The fixed frame has a flange with a tapered distal edge so that a seal is mounted to the flange and the seal has a tongue portion rested on the tapered distal edge. The tongue portion movably contacts the tubular portion. The movable member has a tapered distal edge on which a tongue portion of another seal is rested and movably contacts a flange of the fixed frame.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: January 16, 2001
    Assignee: Basso Industry Corp.
    Inventors: Roman Ho, Sunking Hung, Jack Chen
  • Patent number: 6164660
    Abstract: A rebuildable radial lip seal having a replaceable sealing element for sealing around a movable shaft and adapted for removable placement within a seal housing. The rebuildable radial seal comprises an annular sealing body which extends radially between an annular inner seal surface and an annular outer seal surface. The inner seal surface defines a first inner diameter and includes a circumferential rib which protrudes radially inward from the inner surface. An annular end flange is coaxially engageable with the seal body. The end flange includes a coaxially protruding annular rim which is engageable within the first inner diameter of the seal body to form a circumferential inner slot between the circumferential rib and the inner surface of the seal body and the annular rim on the end flange. An annular sealing element having an inner sealing lip is sealably captured within the inner circumferential slot formed between the seal body and the end flange.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: December 26, 2000
    Assignee: Saint-Gobain Performance Plastics Corporation
    Inventor: James R. Goodman
  • Patent number: 6145842
    Abstract: A torque converter has a lip seal abutting the torque converter impeller control pump drive hub. The drive hub is rotatably supported in a transmission housing. Oil from the drive hub side of the bushing passes through the bushing into a chamber sealed from atmosphere by the lip seal. The lip seal has a component rotatably sealing on a diameter greater than the drive hub diameter. The bushing, in one embodiment, has a control passage for exhausting a portion of the oil from the control pump side prior to reaching the chamber.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: November 14, 2000
    Assignee: General Motors Corporation
    Inventors: Steven Wayne Zellers, Steven Franklin James
  • Patent number: 6004039
    Abstract: In a structure for lubricating an oil seal interposed between a shaft and an outer circumferential member that surrounds the shaft, a bearing device provides: a shaft rotatable; an outer case surrounding the shaft and including a large-diameter portion, a medium-diameter portion, a small-diameter portion, and a contact portion connecting the medium-diameter portion and the small-diameter portion; a bearing assembly disposed in the large-diameter portion for supporting the shaft; an oil seal assembly interposed between the shaft and the outer case and contacting the medium-diameter portion and the contact portion; and a lubricant-containing member fitted to the oil seal assembly and molded plastically in an annular shape out of a resinous material containing a lubricant. The structure improved by the bearing device ensures satisfactory lubricating effects in a consistent manner.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: December 21, 1999
    Assignee: NSK Ltd.
    Inventors: Toshikazu Yabe, Fumio Ueki, Hiroji Etoh
  • Patent number: 5899460
    Abstract: A refrigeration compressor seal for inhibiting the loss of refrigerant between a compressor shaft and a compressor housing. The seal includes a face seal comprising a seal nose and a mating ring positioned in opposing relation to the seal nose. The mating ring includes tungsten carbide (e.g., solid tungsten carbide with 6% nickel binder). The seal nose comprises a maximum of about 0.5 weight percent lead (e.g., a low lead tin bronze allow, such as alloy C90300). A lip seal is operatively positioned between the compressor housing and the compressor shaft. The lip seal and the face seal collectively form a seal cavity for retaining fluid adjacent to the face seal. The seal assembly can further include a bypass channel for bypassing fluid around a top portion of the lip seal.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: May 4, 1999
    Assignee: Rexnord Corporation
    Inventor: Keith L. Altieri
  • Patent number: 5758880
    Abstract: A self piloting seal assembly for use on a rotatable shaft pump unit, the seal assembly including a seal head assembly in constant contact with a seal seat assembly. The seal head assembly includes an elastomer boot, a spring seat, a ferrule and a spring all disposed around a seal washer. The seal seat assembly includes a ceramic radial seal seat disposed within an elastomer boot member. The seal washer is in constant contact with the seal seat assembly to prevent leakage of any fluid between and around the shaft member.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: June 2, 1998
    Assignee: Freudenberg-NOK General Partnership
    Inventors: Kevin F. Ice, Robert S. Holt