Abstract: A seal for an axle shaft assembly which may be found in an automotive transmission or drive axle, is provided. The seal may accommodate significant axle deflection, while retaining a fluid-tight seal between multiple sealing surfaces. The seal may include dynamic flanges configured to seal against surfaces which are angled or orthogonal with respect to one another. The seal may also include one or more holes extending from an outer surface to an inner surface of the seal, such that a body of the seal forms a conduit which allows fluid, such as lubricating fluid, to flow through the seal.

Abstract: A sealing device for a motorcycle suspension provided with an armature on which an elastomeric covering is mounted, said covering comprising a first radially outer portion, for providing a dynamic seal with a first component of the motorcycle suspension, and a second radially inner portion for providing a guide and a static seal with a second component of the motorcycle suspension, on which the sealing device is mounted; the elastomeric covering is integrally connected to the armature and the radially outer portion has at least one first, flexible, annular sealing lip which projects, protruding in a radially and axially external direction so as to cooperate, during use, in a sliding manner, with a surface of the first component of the motorcycle suspension.

Abstract: Provided is a sealing device capable of exhibiting a screw pumping effect in an early stage while inhibiting leakage of a fluid to be sealed by providing thread protrusions. A second inclined surface is provided with a plurality of first thread protrusions that cause a fluid to be sealed to flow toward a region to be sealed when the seal lip rotates in one direction relative to a shaft, and a plurality of second thread protrusions that cause the fluid to be sealed to flow toward the region to be sealed when the seal lip rotates in another direction relative to the shaft. In a state before progress of sliding wear on the seal lip, a sidewall of each of the first thread protrusions on a side facing the region to be sealed and a sidewall of each of the second thread protrusions on the side facing the region to be sealed are both designed to be parallel to a center axis line of the shaft in a state in which the seal lip is in contact with a surface of the shaft.

Abstract: A technique facilitates improved sealing with respect to safety valve pistons so as to improve reliable safety valve operation. According to an embodiment, a safety valve piston seal assembly is positioned about a safety valve piston and comprises components which divert a load path to the safety valve piston rather than to susceptible components of the seal assembly. For example, the seal assembly may comprise a load ring and spacers to energize a V-ring when pressure is applied to a metal spring energized (MSE) seal. However, the components are arranged so the load path is diverted to the safety valve piston when pressure occurs behind the V-ring instead of allowing the loading to act against the MSE seal.

Abstract: A seal assembly includes an annular rigid support member having a centerline and including an axial portion coupleable with the outer member and a radial portion extending inwardly from the axial portion. The radial portion has an outer end formed with the axial portion and an inner end defining a central opening disposeable around the shaft and being formed asymmetrical about the centerline and/or having a varying radial distance from the centerline. An annular sealing member has an outer portion attached to the support member and an inner portion with a first end providing a sealing lip, the sealing lip sealingly engageable with a running surface about a shaft to define a sealing interface, and a second end attached to the inner end of the support member radial portion. As such, contact pressure of the sealing lip against the running surface varies about a circular perimeter of the sealing interface.

Abstract: A multi-layered lip seal comprising a dynamic layer optionally having a filler incorporated therein and a static layer optionally having a filler incorporated therein is described. The lip seal has an annular ring shape, wherein an inner diameter of the ring shape is curved in an axial direction so as to give the lip seal a J-shape when viewed from a cross-sectional perspective. Fillers that can be included in static layer include stiffening filler, reinforcement fillers, conductive fillers and/or abrasion resistance fillers. Fillers that can be included in the dynamic layer include wear resistance fillers. The use of specific fillers in specific layers of the multi-layered lip seal allows for certain segments of the lip seal to be imparted with the benefits of the filler without negatively impacting other segments of the lip seal.

Abstract: A seal ring has a central axis and an elastic ring member made of elastic material and an annular body portion and a flange surrounding the annular body portion. The thickness of the flange is smaller than the thickness of the annular body portion as measured in the axial direction of the seal ring. A hose connector assembly includes the aforementioned seal ring.

Abstract: The invention is directed to methods and devices to facilitate positioning of a catheter into a vessel and selectively controlling flow of fluids through the catheter until desired using one or more valves.

Abstract: Disclosed is a method for retrofitting an elevator machine with a thrust bearing, including removing, from a bearing stand, a first cover plate, providing access to an end portion of a motor shaft, securing an extension shaft against the end portion of the motor shaft, securing a thrust bearing housing against or axially offset from the bearing stand, positioning a thrust bearing in the bearing housing, wherein an inner race of the thrust bearing is securely positioned against, and axially fixed to, the extension shaft, and an outer race of the thrust bearing is securely positioned against the bearing housing, and securing a second cover plate to the bearing housing.

Abstract: A seal assembly configured to be mounted between a rotatable shaft and a housing has a first side and a second side axially spaced from the first side and includes an annular seal support having a first end at the first side of the seal assembly and a second end spaced axially from the first end, at least one seal body configured to form a seal between the shaft and the seal support, the at least one seal body contacting the seal support at a joint, and a resilient annular body mounted between the seal support and the housing. All portions of the resilient annular body are located radially outward of the joint.

Abstract: A seal for a bearing includes an annular retaining ring defining a first radially innermost portion and a first radially outer end; and a resilient ring defining a second radially innermost portion and a second radially outer end. The first radially innermost portion and the second radially innermost portion are aligned with one another and together define a securing root of the seal. The root is adapted to seat in a groove of an inner ring of the bearing. The resilient ring projects radially outward from the annular retaining ring. The resilient ring is more flexible than the annular retaining ring. The second radially outer end defines a sealing surface adapted to slidingly engage an inner bearing surface of an outer ring of the bearing. The first radially outer end of the retaining ring terminates between the first radially innermost portion and the second radially outer end of the resilient ring.

Abstract: A sealing device that suppresses degradation of sealing properties resulting from conduction of heat generated by sliding of a resin-made sealing member and a rotating shaft to a rubber-made sealing member. The sealing device includes a rubber sealing member (110), a resin sealing member (120), a support ring (130), and a case (180), the support ring (130) has: a large diameter portion (131); an inward flange (135) that extends inwardly in a radial direction from an end portion of the large diameter portion (131) on an air side, and has a notch (135a) with which a nail portion (183) of the case is engaged; a small diameter portion (133) that is in contact with an inner peripheral surface of a lip portion (112) of the rubber sealing member (110); and a lip retaining portion (134).

Abstract: A vehicle hub bearing unit including an outer ring; a wheel hub rotating about a common axis of symmetry of the outer ring and of the wheel hub; a wheel flange that extends radially from the wheel hub on the outside of the outer ring; a plurality of rolling bodies interposed between the outer ring and the wheel hub; at least one sealing assembly arranged on the side of the wheel flange, which is delimited towards the outer ring by a radially extending first face; and a protective ring that surrounds the outer ring and which radially extends in a position facing the first face of the wheel flange and beyond a first annular step of the first face that protrudes axially; a radially outer section of the protective ring overhangingly axially extending from the outer ring towards the wheel flange and axially beyond the first annular step.

Abstract: An elastomeric seal, the seal (10) having an elastomeric part (15) with a contact surface (17) for contacting, in use, a movable surface (30), the contact surface having a distribution of dimples thereon, the dimples having a depth of at least 9 ?m, an aspect ratio of at least 0.2 and an area density of from 0.05 to 0.5.

Abstract: Seals for use in machinery and apparatuses to prevent leakage of fluids and methods, apparatuses and systems related thereto are provided. The seals can be used in apparatuses that use and/or process fluids having low to medium viscosity at low or high pressures while still preventing leakage of the fluids from the apparatus during processing.

Abstract: The sealing performance by a side seal is improved by changing the sealing function of the side seal for a linear guide apparatus which includes, as constituting components, a seal member, a holder plate that holds the seal member, and a cover (a scraper) depending on its application of the side seal. Plural types of the seal members (1A to 1B) which have a difference in at least any one of the inclination, the material, the thickness, and the tip shape of lips (11a to 11f) are prepared as the seal members. Multiple numbers of the seal members among those seal members are appropriately selected, the same number of the covers and the same number of the holder plates are combined together to assemble the side seal.

Abstract: A radial shaft seal and assembly are provided. The seal has an annular mounting portion and a seal body bonded thereto. The seal body extends to a seal lip extending between an oil-side end and a free air-side end. An annular bridge extends between the seal lip and a central portion of the seal body in radially overlying relation to the seal lip. A primary dust lip extends from the air-side end and has an annular rib configured for sealed abutment with a running surface of a shaft. The annular rib has at least one vent. An auxiliary dust lip extends from the central portion of the seal body to a free end configured for sealed abutment with the shaft. The free end of the auxiliary dust lip has at least one vent spaced circumferentially from the at least one vent in the annular rib.

Abstract: A friction device for a bearing assembly includes an annular friction module defining a friction surface that extends around a revolution axis of the friction device and that is configured to lie against and to exert a friction torque on a cylindrical surface rotating with respect to the friction device, the friction surface being cylindrical before the friction device is mounted around the rotating cylindrical surface.

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.

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.

Abstract: A seal for sealing a space between a shaft and a housing, includes a base member coupled with one of the housing and the shaft and a generally annular, elastomeric sealing member sealingly contactable with the other one of the housing and the shaft. The sealing member is coupled with the base member such that the sealing member is circumferentially strained to reduce friction between the sealing member and the other one of the housing and the shaft. The seal assembly is preferably formed by providing a base member having a generally annular carrier portion and a generally annular, elastomeric sealing member, coupling the sealing member with the annular portion of the base member, and plastically deforming at least a section of the base member carrier portion such that the sealing member is circumferentially strained.

Abstract: An annular seal member configured to seal a gap between a shaft hole and a shaft inserted into the shaft hole, the annular seal member comprises: an annular base part; an annular lip, which includes a lip edge that is configured to be contact with one of a hole face of a shaft hole and an outer periphery of a shaft, the one of which is a seal mating face; a first convex part, a second convex part and a passage recess, which is provided at a face of the base part facing the seal mating face; a concave part, which is formed at a position between the second convex part and the base end portion of the annular lip, and which has a circumferential size larger than a recess width of the passage recess.

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.

Abstract: An annular elastic gasket adapted to be disposed between an insertion hole formed in a housing and a cylindrical body which is inserted into the housing via the insertion hole in such a manner that the annular elastic gasket elastically contacts an inner surface of the insertion hole and an outer circumferential surface of the cylindrical body. The annular elastic gasket comprises a hollow cylindrical gasket base body comprised of a molded body made of an elastic material, to be compressedly fitted and retained in the insertion hole, an annular seal lip portion extending in the centripetal direction from the gasket base body and an elastic extending portion which constitutes an extending base portion at an end of a tip side portion of the annular seal lip portion, being bent in such a manner that the end directs in the centripetal direction.

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

Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting 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 mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.

Abstract: A sealing assembly for insertion between first and second mechanical elements subjected to offset positioning, including a reinforcement ring and at least one elastomeric sealing element in which the reinforcement ring is at least partially embedded, the sealing element including an annular membrane shaped as a truncated-cone sleeve and free from the reinforcement ring, which membrane obliquely extends to protrude from the reinforcement ring, towards a symmetry axis of the sealing assembly and ends with at least one annular sealing lip intended to slidingly cooperate with the first mechanical element; the membrane has, in radial direction, a relatively thin thickness, thinner than that of the at least one sealing lip, so as to be highly flexible, and a plurality of stiffening ribs formed with the membrane, which extend in the axial direction, parallel to one another, spaced apart from one another to form longitudinally extending radial projections on the membrane.

Abstract: In a section passing through a central axis of the annular sealing device 100, if a radius of curvature of a curved face between a first inclined face 110X and a second inclined face 110Y is R0, a radius of curvature of a curved face between a side face on a sealed fluid side (O) and the first inclined face 110X in an annular groove is R1a, R2a, R3a, and R4a for respective annular grooves, and a radius of curvature of a curved face between a side face on an atmosphere side (A) and the first inclined face 110X in an annular groove is R1b, R2b, R3b, and R4b for the respective annular grooves, R1b, R2b, R3b, R4b<R0<R1a, R2a, R3a, R4a is satisfied.

Abstract: A fuel supply unit includes a fuel reservoir (22) for holding fuel. A fuel pump (18) is in the reservoir for pumping fuel from the reservoir. A jet pump assembly (16) is within the reservoir for drawing fuel from a fuel tank into the reservoir. A seal structure (24) has a flange (28) with a living hinge (31). The seal structure is operatively coupled with a housing of the jet pump assembly and disposed between the housing and a portion of the reservoir, with a portion of the flange being pivoted about the living hinge such that the portion of the flange engages an interior surface of the reservoir, providing a seal between the housing of the jet pump assembly and the interior surface of the reservoir.

Abstract: A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air side of the seal from an oil side of the shaft seal is provided. The seal includes a mounting portion and a seal lip having an annular sealing surface extending between an oil side end and a free air side end. An annular bridge is connected to the oil side end of the seal lip by a first hinge and to the mounting portion by a second hinge. The bridge extends from the first hinge to the second hinge in radially overlying relation to the seal lip. A projection extends from the first hinge away from the bridge toward the oil side of the seal to prevent the seal lip from inverting during the oil-side installation assembly.

Abstract: A stern tube sealing assembly and a seal ring thereof has a key part having an inverted V-shape, a front step part on the front side, and a back step part on the back side thereof. The seal ring width in a propulsion-shaft axis direction becomes thinner in the transition area from the key part toward a heel part. The inner diameter of the key part at the back step part is greater than that of the key part at the front step part. The ring has a lip part having a V-shaped lip tip protruding inwardly in the radial direction and a spring groove having a semicircular cross-section. The center of the spring groove is nearer to the inboard side than the lip tip, by an offset in the axis direction, the offset being within approximately 10% of the orthogonal projection length of the width of the lip back.

Abstract: A method of fabricating a PTFE seal element and rotary shaft seal assembly therewith. The method includes providing a PTFE seal element and a vacuum chamber having electrodes therein. Next, placing the PTFE seal element on one electrode and drawing a vacuum pressure in the chamber and introducing a first process gas into the chamber. Further, applying a high frequency signal to the electrodes and producing a discharge plasma and etching and chemically modifying a surface of the PTFE seal element with the discharge plasma. Then, purging the vacuum chamber with a second process gas and restoring the vacuum chamber to an atmospheric pressure. Thereafter, rinsing the seal element and applying an adhesion promoter to the etched and chemically modified surface. Lastly, attaching the etched and chemically modified surface of the PTFE seal element to the carrier by molding an elastomeric material between the seal element and the carrier.

Abstract: A pump includes a housing and a shaft rotatable about an axis. The shaft has a shaft diameter and has a portion disposed within the housing. A plurality of retractable vanes is coupled to the shaft and each vane includes a first end that contacts the housing. A seal element is positioned to define a seal between the shaft and the housing. The seal element includes a first bushing, a second bushing, and a dry seal assembly including a wiper that defines a diameter that is smaller than the shaft diameter.

Abstract: A sealing device that hermetically seals a gap between a first member and a second member that is reciprocally movable with respect to the first member. The sealing device seals liquid supplied into a pressurizing chamber surrounded by the first member and the second member. The sealing device includes a seal member that is attached to the second member. The seal member slides relative to the first member while being in contact with the first member. The seal member includes a base portion and a protruding portion. The protruding portion protrudes from the base portion toward the first member to separate the first member from the base portion. After the liquid is supplied into the pressurizing chamber to fill the pressurizing chamber with the liquid, the protruding portion elastically deforms to bring the base portion into close contact with the first member.

Abstract: A high pressure piston for use within a liner sleeve of a reciprocating pump comprises a dual-durometer elastomeric seal having first and second coaxial seal sections and, in certain embodiments, a circumferential bearing ring. Interactions of the seal components, including seal elastomers, result in stress redistribution within the seal which maintains sealing preload, with corresponding improved extrusion resistance and seal durability. When a bearing ring is present, a pump's pressure stroke causes at least a portion of the bearing ring to elastically expand radially to narrow or close the extrusion gap, thus tending to block elastomer extrusion by establishing sliding contact between the bearing ring's external surface and the liner. On the pump's return stroke the slightly wider extrusion gap allows cooling water directed generally toward the proximal flange of the piston hub to better cleanse, as well as cool, the liner wall.

Abstract: Disclosed herein are a sealing member for a master cylinder and a master cylinder having the same. The master cylinder is configured such that a communication hole of a piston is rapidly brought into communication with an oil path toward an oil tank upon release of braking. This may minimize meaningless retracting movement of the piston and delay in a braking release operation. The sealing member for the master cylinder includes an outer wing part to come into contact with the cylinder body, and an inner wing part to come into contact with the outer surface of the piston. The inner wing part includes a seal formed at a tip end thereof and at least one oil passage formed in a surface thereof opposite the outer surface of the piston.

Abstract: A thermal protection system and a method of manufacturing are disclosed. The thermal protection system may be configured to protect a movable joint, for example, a flexible bearing of a rocket motor nozzle. The thermal protection system includes a series of annular shims separated by a plurality of discrete spacers. Each shim of the series of annular shims may have a larger diameter than the previous shim, and the shims may nest. The shims may comprise a thermally stable material, and the discrete spacers may comprise an elastomer. Optionally, an annular bearing protector may separate the annular shims from the flexible bearing.

Abstract: A radial shaft sealing ring for the sealing separation of an internal space (6), from an external space (5), with a sealing lip (2) delimited by a first and a second annular surface (3, 4) of a cone frustum, wherein, the first annular surface (3) is oriented towards the external space (5), and the second annular surface (4) is oriented towards the internal space (6), wherein the annular surfaces (3, 4) are connected to each other via a ring-shaped contact surface (23) of the sealing lip (2), which rests on the shaft (7), wherein the first annular surface (3) forms with the shaft (7) a first angle (??) of 23-40° in the installed position, wherein an inner diameter (24) of the ring-shaped contact surface (23) is 1-15 mm in the installed position.

Abstract: A sealing ring has a sealing element with at least one fastening part and at least one sealing part provided with a sealing edge. The sealing element is essentially of rotational symmetry. The sealing edge, at least over a portion of a circumference thereof, is positioned in a slanted position relative to a seal axis at an angle different from a 90 degree angle, viewed in a projection onto an axial plane of the sealing ring.

Abstract: A lip portion consists of two cylindrical axial lips 421, 422 extended in parallel to an axial direction of a seal 4 and in different lengths (a radial lip is obviated). A neck 22 of a cross shaft 2 is formed with a neck slant portion 221 defined by a conical surface inclined at 45° relative to an axis thereof. The two axial lips 421, 422 are pressed against the neck slant portion in the axial direction.

Abstract: A liquid seal has an annular lip portion and an annular fixing portion to be fixed to an inner peripheral surface of a shaft hole, in which the lip portion is connected to the fixing portion and is provided so that a tip thereof is extended in an axial direction, a spring pressing a seal lip against an outer periphery of the rotation shaft is fitted onto the lip portion. The seal lip forms a mountain shape in which an edge of the apex in the cross section, which is cut along a plane passing through a center axis of the seal, protrudes to the inner diameter side, and the pressure center of the seal lip due to the spring is disposed between the tip side of the lip portion further than the edge of the apex of the mountain of the seal lip in the axial direction.

Abstract: A gate valve for vacuum capable of preventing a seal member from being cracked or particles from being produced due to a stress concentration even if the seal member is repeatedly compressed in the state that the adhesive agent is separated from the open side of a seal member mounting groove and capable of suppressing particles from being produced due to the rub of the seal top part with the seal surface.

Abstract: [PROBLEMS] A seal device where a seal lip reliably maintains shaft sealing relative to high-pressure fluid that is to be sealed and where the equivalent Mises stress occurring in the seal lip is reduced to extend the durable term of the seal lip longer. [MEANS FOR SOLVING PROBLEMS] A backup ring (2) has a tapered section (23) continuously extending from a fixation section (21) of the backup ring (2) and also has a forward end section (24). A rounded surface (E) with a curvature radius (R-1) is formed at least at a boundary (26) where a surface (D) of the tapered section (23) changes to a surface (F) of the forward end section (24). A portion of the surface (D) of the tapered surface (23), which portion is in contact with the rounded surface (E) at the boundary (26), is a projected curvature surface having a curvature radius greater than the curvature radius (R-1) of the boundary (26).

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.

Abstract: A seal is disclosed for use on the tapered section of a roll neck in a rolling mill. The seal comprises a flexible circular seal body having a central axis and at least one radially outwardly extending flange joined by a hinge to an angularly extending lip. The hinge has a reduced thickness as compared to the thicknesses of the flange and the lip, and the lip has converging first and second sides leading to an enlarged rim. The rim has first and second peripheral faces that converge to an outer edge contained in a reference plane parallel to the central axis of the seal body.

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.

Abstract: A high-friction fluid seal used for high-friction sealing, comprising a fluid seal lip provided on the working fluid filling side to intercept a working fluid; and a dust lip provided on the working fluid non-filling side (the outer side) of the fluid seal lip to intercept dust coming from the outside, wherein the thickness of a working fluid film formed on the extension stroke by the dust lip is smaller than the thickness of a working fluid film formed on the extension stroke by the fluid seal lip.

Abstract: A sealing assembly is provided for sealing an interface between two shafts, including a primary and secondary seal and a rotatable shaft sleeve having inner and outer sleeves forming a sealing cavity therebetween, and enclosing one of the seals. The secondary seal contacts the outer sleeve, and the primary seal contacts the inner sleeve, with the secondary seal circumscribing part of the primary seal. The seals each have a pair of sealing lips forming a sealing cavity therebetween, with one pair of sealing lips being sufficiently shaped to contact the inner sleeve, and the other pair of sealing lips being sufficiently shaped to contact the outer sleeve. A fluid fills the sealing cavities to provide a barrier to debris. The seals are bonded to a seal arm positioned adjacent the housing in contact therewith. The secondary seal is positioned between the sleeve and housing, and circumscribing the interface.

Abstract: In a rotation shaft seal provided with a rubber lip portion, disposed between a housing and a rotation shaft and sliding on the rotation shaft, and a supporting member receiving the lip portion from a low-pressure side, the cross-sectional configuration of the lip portion in free state is a trapezoid diminishing to the end having the maximum thickness portion within an area received by the supporting member.

Abstract: A sealing device includes a side lip contacting with a surface angled to the axis. To optimize the cross sectional shape of the side lip, T1/T3 is set to not less than 0.5 and less than 0.8 and L2/L1 is set to 0.2 to 0.4, where the thickness of the lip end (5c) of the side lip (5) is T1, the thickness of the lip base (5a) is T3, the length of the lip end (5c) is L1, and the length of the lip base (5a) is L2. Further, in a sealing device which includes a side lip (5) contacting with a surface angled to the axis over its contact width, the maximum value of the surface pressure in the side lip (5) is set at the most leading end (5d) of the lip.