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.

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.

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: 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.

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.

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.

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.

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.

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.

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.

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.

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.

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).

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.

Abstract: [PROBLEMS] A seal device where a seal lip reliably maintains shaft sealing relative to high-pressure fluid that is to be scaled 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 sealing assembly (1a, 1b) including: a first annular shield (10) presenting a sleeve portion (11) and a flange portion (12) which extends radially from a first end (13) of the sleeve portion; and a sealing member (15) made of elastomeric material presenting an annular root portion (16) which extends radially and overhangingly from a peripheral edge (18) of the flange portion and a first axial annular sealing lip (20) in which the sealing member presents a second radial annular sealing lip (21), the lips (20, 21) axially and overhangingly extending from the opposite side of the first end of the sleeve portion, on a same side as a thinned end (23) of the root portion and being reciprocally spread to form a radial V-shaped section having vertex facing the root portion and axis parallel to the sleeve portion; the first lip presenting a radial seat (32) facing the opposite side of the second lip and accommodating a toroidal spring (33) applying an offset radial stress to an elastic hinge defined by the thinned e

Abstract: A rotary seal is provided. The rotary seal includes an annular seal element having a sealing surface. The seal element further includes a surface opposite of the sealing surface including a first coupling portion. The rotary seal also includes an annular energizer including a second coupling portion complementary to the first coupling portion. The first and second coupling portions engage so as to inhibit relative rotation between the seal element and the energizer.

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.

Abstract: On a seal lip, first screw projections are arranged from an atmosphere side slope surface to the middle of a sliding surface, and second screw projections are arranged on the sliding surface. The end section on the sliding surface side of a first screw projection has a shape (cutout section as if the section is cut out along the sliding surface, and a portion on the atmosphere side slope surface side of the first screw projection has an equi-width section with a shape where the height of the section increases toward the atmosphere side with the width kept substantially the same. Therefore, a sealing device is easily processed, and, at an early stage and for permanence, the sealing device provides a screw pump effect that exhibits excellent sealing ability for a long period.

Abstract: The lip-type seal of the present invention includes a seal ring made of an elastic material so as to have an annular fitted part that is fitted to a housing and a lip part that extends from the fitted part inwardly in a radial direction in the shape of a substantially conical ring and that is brought into contact with a shaft, and a support ring including an annular joint part joined to the fitted part and an annular supporting part that defines a hole through which the shaft passes, that extends from a side of the joint part to a halfway area of the lip part, and that supports the lip part from inside in a radial direction. The lip part is tapered in cross section from an area from which non-contact with the supporting part starts toward an end thereof.

Abstract: A metal valve stem seal and sealing system includes a valve body, a metal valve stem housed within the valve body, a bonnet member housed within the valve body, and a U-shaped metal stem gasket positioned between the metal valve stem and the bonnet member. The gasket has a first lip member and a second lip member. The metal valve stem seal and sealing system also includes a metal wedge ring fitted between the first and second lip members and at least one metal energizing spring adjacent the wedge ring. The 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.

Abstract: In a cooling module arrangement with a seal element for a motor vehicle having an engine including a cooling fan with a fan housing component connected to the engine and a fan cowl component connected to a radiator of the motor vehicle with a gap provided between the fan housing and the fan cowl components, wherein a sealing element is connected to one of the components and includes in the area of its free end a circumferential bead, so that, in a pre-installation position, it is firmly held folded back onto the one component so as to facilitate installation of the components but, when unfolded, extends in its operative position across the gap between the components and firmly engages with its free end the other component.

Abstract: The present invention involves a sealing member assembly used as a fluid and debris barrier for use in association with the extendable walls of an extension unit for a structure. The sealing member assembly includes a frame attached to the structure, a sealing member slideably coupled to the frame and bearing against the extendable walls of the structure, and a biasing member biasing the sealing member away from the frame and against the extendable walls.

Abstract: A seal assembly adapted for use in creating a seal between an axially extending shaft and a support member. The seal assembly defines an axial passage through which the shaft extends, wherein a bearing assembly is mounted to the support member and includes a stationary outer race and an inner race which rotates along with the shaft. The seal assembly includes a rigid ring defining an axial passage through which the shaft extends and a resilient material carried by the ring. The resilient material defines an inner sealing section adapted to engage the shaft and an outer sealing section located radially outwardly of the inner sealing section and adapted to engage an outer sealing surface associated with the support member.

Abstract: The present invention relates to a plug valve comprising a valve body and a shutter that can be actuated, in the form of a segment of a sphere provided with a mobile shaft in rotation and/or translation, said valve also comprising a double-barrier sealing system at the level of said shaft, said valve being characterised in that the joints of said double-barrier sealing system are maintained in place relative to the shaft by a single lid.

Abstract: A seal system for use in high speed, high pressure applications including a rigid retainer and a resilient body covering the retainer having pressure balancing control. Reduced clearance of the metal case retainer prevents seal extrusion.

Abstract: A V-ring seal is disclosed for sealing between relatively rotatable surfaces in which the V-ring seal comprises PTFE and includes a body with an inner side for abutting against a first surface and a lip extending from the body towards a second surface, the lip including a rear side distal from the second surface, a front side proximate to the second surface, a lower portion proximate to the body, an upper portion distal from the body, a sealing surface on the front side of the lip for abutting the second surface to seal the second surface, and a resilient ring for providing a force acting on the lip to urge the sealing surface towards the second surface, the resilient ring being disposed on the front side of the lower portion of the lip whereby the resilient ring is concealed from the rear side of the lip.

Abstract: According to the invention a seal—arranged between a radially inwardly facing outer boundary surface of an annular sealing gap and a radially outwardly facing inner boundary surface of the sealing gap—is characterized by a sealing ring having a sealing surface which bears sealingly against one of the boundary surfaces of the sealing gap and having a pressure surface which on the side of the sealing ring in radially opposite relationship to the sealing surface forms with the other of the boundary surfaces of the sealing gap an intermediate space which is wedge-shaped in cross-section, and a pressure ring which is biased by a biasing means at least at times into the intermediate space against the other of the boundary surfaces of the sealing gap and the pressure surface for pressing the sealing surface against the one boundary surface of the sealing gap.

Abstract: A high-pressure pumping system including an energizing seal component having an aperture extending therethrough and a seal jacket component having a base and a toroidally-shaped flared membrane extending from the base. The body and the flared membrane are monolithically formed of an inert polymeric seal material. The flared membrane extends through the aperture and encircles the energizing seal component to isolate the energizing seal component from fluid of the pumping system. The flared membrane may extend axially from the body and encircle the energizing seal component. The flared membrane may encircle the energizing seal component and overlaps a portion of the base. The seal jacket component may be formed around the energizing seal component. The seal jacket component may include a flange extending radially outwardly from the base.

Abstract: A shaft sealing ring for a shaft comprises a sealing lip made of an elastomeric material or a PTFE compound and dimensioned as to be flaccidly bendable. The flexural elasticity is selected such that it will just be sufficient to press a sealing portion of the sealing lip into sealing engagement with the periphery of the shaft. The sealing portion of the sealing lip engages the periphery for a predetermined length. In the sealing portion, the sealing lip is provided along its circumference, at the side of the shaft, with endless, undulating return channels at least throughout this length. These channels return any medium escaping during rotation of the shaft to the space to be sealed. The return channels do not communicate with the surroundings of the shaft sealing ring. No seperate contact pressure means, such as a helical ring coil spring is required to press the sealing lip into engagement with the shaft.

Abstract: A high-pressure sealing arrangement is provided for sealing a gap (26) between two concentric machine parts (4, 5) which can be moved relative to each other, of which a first machine part (4) comprises a groove (3) and a second machine part (5) comprises an outer peripheral surface (7) opposite the groove (3). A sealing ring (1) of an extrusion-resistant material and a tensioning ring (2) of an elastomeric material are provided in the groove (3). A shaped section of the sealing ring (1) on the low-pressure side can be deflected towards the outer peripheral surface (7) under fluid pressure load. When the pressure decreases, the pressure-dependent deflection of the sealing ring (1) automatically returns towards the initial, unpressurized state of the sealing ring (1).

Abstract: Disclosed is an improved sealing element for a regenerative heat exchanging apparatus, such as a Ljungstrom™-type or a Rothemuhle™-type Preheater. The sealing element is mounted to a radial wall to provide a secure seal between the radial wall and an outer housing of the heat exchanging apparatus and prevent leakage between the hot gas conduit and cool air conduit. In one embodiment, the sealing element includes a reinforced mounting strip that is used to mount the sealing element to the radial wall. The sealing element also includes a sealing strip that maintains a sealing contact between the radial wall and outer housing and a support member that inhibits over-flexing of the sealing element. A set of bellows is positioned on the sealing element to provide the sealing element with flexibility and resiliency so that the sealing element maintains contact with the sealing surface even when the heat exchanging apparatus experiences warping and/or distortion from thermal stress.

Abstract: A radial shaft sealing ring, comprising a sealing member made of plastics, especially PTFE compound material, and including a sealing lip which has a portion in sealing engagement with the surface of a shaft towards the medium side is characterized in that a contact pressure means is provided at the medium side of the sealing lip for applying a force with a radially inwardly directed component to said portion of the sealing lip, keeping it pressed against the surface of the shaft.

Abstract: A rotating seal assembly, comprising: a first member having a circular hole passing therethrough; a second member having a circular shape, the second member being positioned such that an annular gap is present between the first and second members; a contacting member spanning across the annular gap, the contacting member being mounted to one or the other of the first and second members; at least one support assembly disposed on one of the first or second members, the at least one support assembly being mounted to the same member as the contacting member; and a sealing ring, wherein the support assembly holds the sealing ring against the contacting member, thereby pushing the contacting member against the opposite member to which the support assembly is attached.

Abstract: A seal system is provided for a bearing. The bearing includes a housing having two sides and a bearing element disposed within the housing. The bearing element is disposed to facilitate motion of a rotating shaft. The seal system includes a seal carrier which is adapted to be mounted on the bearing housing. The seal carrier has a groove in an inner periphery wherein a seal is disposed within the seal carrier groove. The seal has a soft flexible lip which contacts the rotating shaft. A groove is formed in an outer periphery of the seal for receiving a retaining device. The seal and the seal carrier are mountable on either side of the bearing even when the two sides experience dissimilar environments such as vacuum on one side and a liquid spray on the other. The seal and/or the seal carrier may be split for facilitating simpler in-field installation.

Abstract: A sealing device for sealing the gap between two relatively moving members is provided with a pivot point on its cross-sectional perimeter. As pressure against the seal increases, the seal rotates about the pivot point, resulting in an increased sealing surface area on the seal. Additionally, a recess is provided on the cross sectional perimeter, advantageously offering a more frictionless sealing relationship between the seal and the moving member. Further, a recess is provided on outer portion of the cross sectional perimeter on a surface of the seal that would contact an energizer ring, the recess eliminating a dynamic interface between the energizer ring and the seal.

Abstract: A radial lip seal for sealably mounting within a split circular seal housing includes a seal body having a channel disposed along a seal body outside diameter. The radial split seal includes an annular seal body which is divided into at least two substantially similar semi-annular seal body sections that are each connected together at end portions. The seal body formed from such sections includes a sealing lip that extends radially inwardly from the body for slidable sealing contact around a rotatable shaft. An energizer is seated within the channel. The seal is mounted within a seal housing that is configured to fix the axial placement of the seal therein. The energizer is interposed between the seal and the seal housing to both allow the seal to move radially a desired distance within the seal housing in response to seal thermal expansion and contraction, and to provide a leak-tight seal therebetween.

Abstract: A seal assembly for providing sealing between a movable cylindrical body and a housing body comprises separate sealing mechanisms for providing static and dynamic sealing. The seal assembly is associated in fixed relationship with either the cylindrical body or the housing body and provides a static seal with the body it is associated with and a dynamic seal with the body that moves relative to the seal assembly. The static sealing mechanism is temperature-activated so that within the operating temperature range, a metallic member of the static seal mechanism is pressed tightly against the associated body to provide a fluid tight static seal. The temperature-activation is caused by the metallic member having a different thermal expansion coefficient than the associated body. The dynamic seal may employ known dynamic sealing mechanisms such as spring-energized seals, interference fit seals, and/or temperature-activated seals.

Abstract: The present seal system is in two parts. First is that of an elastomer energizer, which may be in the shape of a square ring, o-ring, or an other custom design for energizing the seal system. Second is that of a seal element having a particular geometry and composition. The geometric layout of the seal element ensures firm contact between the seal and groove bottom, independently of the seal pressure and radial position of the moving part, and concentrates contact forces against the moving part by means of a seal apex. In the installed state, the seal is forced into contact with the groove bottom by having an outer diameter matching or exceeding that of the groove bottom, and a radial height exceeding that of the housing groove. Further, the influence of the compression ring or energizer is balanced out by positioning the seal apex near the axial position of the center of the energizer.

Abstract: A radial shaft sealing ring, comprising a sealing member made of plastics, especially PTFE compound material, and including a sealing lip which has a portion in sealing engagement with the surface of a shaft towards the medium side is characterized in that a contact pressure means is provided at the medium side of the sealing lip for applying a force with a radially inwardly directed component to said portion of the sealing lip, keeping it pressed against the surface of the shaft.

Abstract: An improved neck seal having an interior surface being concave throughout and shaped to entirely conform to the circumference of a roll surface of a roll. The concave surface further defines the interior side of an oil-side lip extending upwards from the seal body. A portion of the lips outermost end extends radially downward to form a first stop integral with the lip. A portion of the outermost end of the seal body also extends upward from the top surface thereof to form a second stop integral with the seal body. A v-shaped spring is then disposed in a v-groove defined by the inclined bottom surface of the oil-side lip, and the flat top surface of the seal body. In this manner, the first and second stop retain the spring in a position conducive for a more positive seal contact between the lip of the seal and the roll neck without the use of a garter spring.

Abstract: This invention describes a seal ring which is consisted of a spiral spring wire acting as an expander device where in turn is inserted inside a C and or U shaped jacket made of a softer material such as elastomer or teflon in such a manner that forces the outer and inner lips of this jacket outwardly and inwardly accordingly to create a seal under extreme side loading and offsets of mating shaft.

Abstract: Herein disclosed is a shaft sealing apparatus which comprises a vacuum casing formed with a vacuum chamber, a driving shaft having an outer cylindrical surface and movably extending in the vacuum chamber of the vacuum casing, and a sealing ring in the form of an annular ring shape and including a sealing lip held in contact with the outer cylindrical surface of the driving shaft, an annular spring member operative to impart a force to the sealing lip to ensure that the sealing lip is held in tight contact with the outer cylindrical surface of the driving shaft, and a peripheral portion radially outwardly extending from the sealing lip, in which the outer cylindrical surface of the driving shaft is smaller in surface roughness Ra than 0.1 (&mgr;m).

Abstract: A sealing-device having a body section and an anti-extrusion section is shown, the body section being disposed on top of the anti-extrusion section. The body section includes sealing surfaces for enclosures in which the sealing device is located. the anti-extrusion section prevents extrusion of the body section.

Abstract: A seal is provided for an offshore fluid swivel to seal a gap passage (34) leading from a transfer chamber (20) to the environment, which uses pressured fluid to apply a variable pressure that pushes the seal tightly against a sealed surface (52) on one side of the gap passage. In one arrangement, a ring-shaped seal device includes a seal body (82) of largely U-shaped cross-section, with a base (84) and a pair of legs (86, 88) extending from opposite sides of the base, with the base and at least one leg sealing against walls of the cavity that holds the seal. A hose (90) lies between the two legs and against the base of the seal body, and pressured fluid of greater than chamber fluid pressure is applied to the hose to expand it and thereby push apart the legs of the seal body.

Abstract: A rod scraper for hydraulic cylinders and the like is disclosed which includes an elastomeric ring member having an inner surface defining a central aperture adapted for receiving a rod for axial movement relative thereto, the inner surface including a scraper portion having an inner most circumferential lip positioned adjacent one end of the elastomeric seal member for scraping the rod, the elastomeric ring member further having a curved outer surface portion generally axially coextensive with the scraper portion, and a metallic backing ring affixed in overlaying relation to at least a substantial portion of the curved outer surface portion of the elastomeric ring member, the backing ring being resiliently biased against the curved outer surface portion to urge the lip of the elastomeric ring member against the rod and sufficiently flexible to allow some radial movement of the rod while maintaining the lip in circumferential contact with the rod.

Abstract: A seal assembly for providing a seal between a cylindrical member and a bore formed in a housing, the housing and cylindrical member being rotatable relative to one another, the seal assembly being located within an annular groove formed in the cylindrical member and having an annular seal body of a plastics material having an outer axially extending circumferential face for sealing abutment with the bore and at least one radially extending end face for sealing abutment with a side face of the groove and a resilient ring member located in abutment with the inner axially extending circumferential face of the seal body for urging said outer circumferential face radially outward to maintain sealing abutment between said outer circumferential face and the bore during cooling of the seal and housing, the resilient ring member having an axial end face contiguous with or located in-board of said end face of the seal body, the resilient ring and seal body being interconnected so as to be axially movable in unison wit

Abstract: A sealing arrangement for providing a seal between a component and a cylinder in which the component is inserted includes a sealing ring supported in the axial direction in a circumferential slot on the component. The sealing ring has at least one static and one dynamic sealing lip. The sealing lips rest radially on corresponding sealing surfaces of the component and the cylinder. To reduce the noise generated during movement of the component in the cylinder, the geometrical shape of at least of one of the sealing lips is asymmetrical in the axial and/or radial direction with respect to a longitudinal axis of the component or a plane perpendicular to the longitudinal axis of the component, or cavities are distributed around a circumference of a base body portion of the sealing ring.

Abstract: A seal assembly suitable for static, rotary and reciprocating sealing between the shaft and the housing is provided and includes a seal ring in the shape of an annulus having a body portion with an inside flange and an outside flange extending axially therefrom and establishing a ring seal cavity therebetween. An inside annular spring is disposed in the cavity for biasing the inside flange against the shaft to provide the dynamics seal therebetween. An outside annular spring is also disposed in the cavity for biasing the outside flange against the housing to provide a static seal therebetween and prevent the rotation of the seal ring. A band is disposed in the cavity in between the inside and outside springs for enabling the inside and outside springs to independently bias the inside flange and outside flange, respectively.

Abstract: A seal assembly is provided for static, rotary and reciprocating sealing between the shaft and the housing. The seal assembly includes a ring seal in the shape of an annulus having a body portion with an inside flange and an outside flange extending longitudinally therefrom. A spring is disposed between the flanges for radially biasing the flanges from one another to effect sealing between the shaft and the housing and a circular band disposed between the spring and the outside flange is provided for maintaining radial force against the outside flange to retain the ring within the housing and provide static sealing between the ring seal and the housing despite shrinkage of the fluoropolymer seal ring.