Abstract: A sealing arrangement having a rod seal for sealing a cavity for a flowable medium in the region of a rod includes an output apparatus for discharging the flowable medium. The rod is movably supported in a housing to be displaced in an axial direction. The housing has a bearing portion, wherein the rod seal is supported in a fixed manner and wherein the rod extends through the bearing portion and the rod seal so that a first rod portion and a second rod portion are arranged at different sides of the bearing portion. The first rod portion is located at a side facing the cavity and the second rod portion is located at a side facing away from the cavity. The rod seal is arranged at the side of the bearing portion facing the first rod portion and has a first sealing lip and a second sealing lip that are spaced apart from each other in the axial direction and circumferentially contact the rod.

Abstract: An improved wiper plug and methods of using the plug during casing and cementing operations within a subterranean wellbore are provided. The present plugs may pre-loaded with at least one engineered material and operative to release the material over time at a target location within the wellbore, such release serving to enhance the degradation of dissolvable components within the plugs and/or within the casing string, and/or to alter the chemical properties of the wellbore environment.

Abstract: A sealing structure for a front cover of an engine includes a front cover made of resin of an engine in which a through-hole, into which a boss part of a torsional damper is to be inserted, is provided, and a sealing apparatus to seal between the through-hole of the front cover and the shaft part. The sealing apparatus includes a support ring that is made of resin and has an annular shape, and an elastic body part that is made of an elastic material, has an annular shape and is attached to the support ring. The elastic body part has an annular seal lip that contacts the shaft part such that the shaft part is able to slide, and the support ring is bonded to the front cover.

Abstract: Isolation plugs may be installed in a wellbore flow control device to temporarily close a flow path therethrough. The isolation plugs may be installed in threaded openings often provided to for access to nozzles or other flow restrictors in the flow control devices. The isolation plugs may initially be locked in a closed configuration while being run in hole and may be unlocked in response to the application of a predetermined activation pressure. Once unlocked, the isolation plug may not immediately move to an open configuration but may continue holding pressure to permit circulation and washdown operations to be conducted. The activation pressure may be reduced to a second predetermined threshold to lock the isolation plug in the open configuration wherein flow is permitted through the flow control device.

Abstract: An assembly includes a spring seat, a spring seat insert, and a seal. The spring seat is slidable along the spring seat insert to define an expandable fluid chamber therebetween. The spring seat includes a groove defining a mating surface. The seal is between the spring seat and the spring seat insert. The seal includes a mating portion at the first end engageable with the mating surface of the groove to prevent fluid from exiting the fluid chamber.

Abstract: A master cylinder includes a seal defining a feeding channel and an exterior of a cylinder main body having an inner circumferential lip portion which protrudes from a toric base portion and comes into sliding contact with an outer circumferential surface of a piston, and an outer circumferential lip portion which abuts a circumferential groove of the cylinder main body. The inner circumferential lip portion has a length in a piston axis direction longer than the outer circumferential lip portion. The circumferential groove has an inclined surface portion formed in a circumferential wall on the feeding channel side such that a groove width increases from a groove bottom portion toward a groove opening portion.

Abstract: A method for producing a piston ring for a cylinder that moves in a sliding direction includes providing a piston ring base material having an upper surface, a lower surface and an outer circumferential surface having a first recess between the upper surface and the lower surface, forming a hard film in the first recess and on a cylindrical surface at a predetermined thickness, and removing, by performing a polishing process on the sliding surface, the hard film formed on the cylindrical surface and a part of the piston ring base material disposed adjacent to the removed hard film, to form a second recess. The second recess is formed by removing an area of the removed part of the piston ring base material as a result of polishing the sliding surface due to a difference in the hardness of the hard film and the piston ring base material.

Abstract: A packing having an annular shape in a longitudinal direction and a uniform cross section, includes a top surface arcuate part, a bottom surface side arcuate part, and side arcuate parts on both sides as viewed in cross section. Opposite ends of the top surface arcuate part and the side arcuate parts on both sides are connected by upper connection surfaces, and opposite ends of the bottom surface side arcuate part and the side arcuate parts on both sides are connected by lower connection surfaces, and the packing has a maximum width between the side arcuate parts on both sides. An angle formed by a segment which connects a peak on the top surface arcuate part and a lowermost point of the bottom surface side arcuate part, and a vertical line passing through the lowermost point, is formed as an outward or inward inclination with respect to the annular shape.

Abstract: A ring-shaped gasket for making high-purity fluid pathway connections between opposing fluid delivery apparatus elements having at least one simple flat surface in contact with the gasket. The face of at least one apparatus element typically has a circular counterbore depression to receive the gasket, but is not required. The gasket has a body, pierced through by a hole creating a fluid pathway and defining a radial inner surface, and additionally having a radial outer surface, a first axial end surface and a second axial end surface. At least one of the first and second axial end surfaces has a stress concentration feature radially adjacent to a gasket sealing region, the sealing region constructed to be in contact with a face surface of a corresponding fluid conduit port. The stress concentration feature may be a groove or a plurality of cavities disposed adjacent the gasket axial end surface sealing region.

Abstract: An evaporator has an outer peripheral side held by a holding portion. The evaporator includes a body portion and a packing located on a part of the body portion that faces to the holding portion. The packing includes an inner elastic layer and an outer elastic layer. The inner elastic layer has a water absorbability smaller than that of the outer elastic layer and is made of a closed cell foam member. The outer elastic layer is made of an open cell foam member. The holding portion includes a first rib preventing an air from flowing along the outer peripheral side of the body portion, and a second rib preventing a displacement of the body portion. A thickness of the outer elastic layer in a condition where the outer elastic layer is not held by the holding portion is larger than a protrusion length of the first rib.

Abstract: A piston fuel pump for an internal combustion engine includes a pump cylinder, a pump piston, and a seal. The pump piston is axially displaceable in the pump cylinder. The seal is arranged on a circumference of the pump piston. A radially outer surface of the seal which faces an inner surface of the pump cylinder is configured, in an axial end region, such that the radially outer surface lies against the pump cylinder as the pump piston is at rest relative to the pump cylinder, and such that a relative motion between the pump cylinder and the pump piston in the axial direction causes the seal to lift off from the pump piston in a radially inward direction.

Abstract: [Object] To provide a seal ring that realizes excellent sealability irrespective of magnitude of hydraulic pressure. [Solving Means] A seal ring includes an outer surface and side surfaces formed symmetrically about a plane perpendicular to a central axis. The outer surface includes a peak portion, first tapered surfaces, and second tapered surfaces. The peak portion is provided along the plane. A diameter of each of the first tapered surfaces is reduced with increased distance from the peak portion, each of the first tapered surfaces forming a first angle with respect to the central axis. Each of the second tapered surfaces is closer to each of the side surfaces than each of the first tapered surfaces is, a diameter of each of the second tapered surfaces being reduced with increased distance from each of the first tapered surfaces, each of the second tapered surfaces forming a second angle with respect to the central axis, the second angle being larger than the first angle.

Abstract: A piston fuel pump for an internal combustion engine includes a pump cylinder and a pump piston, which can be axially displaced in the pump cylinder. The piston fuel pump also includes a seal which is arranged on the periphery of the pump piston. The seal has at least one bump pointing in the axial direction, and the seal axially covers the at least one bump.

Abstract: Upper and/or lower seal plates of a sub plate mounted, pilot actuated spool valve are reinforced with one or more metal rings. In a number of preferred embodiments, the metal ring is comprised of steel. Portions of the seal plates may comprise an engineering thermoplastic such as polyoxymethylene (POM) sold by E. I. DuPont de Nemours under the DELRIN® trademark. The plastic material may be molded to the metal ring. In other embodiments, the plastic material and metal ring(s) are mechanically connected together.

Abstract: A seal has a seal body with an axis and axial-facing surfaces. The seal body is configured to be mounted to a tubular member, and seal between the tubular member and a second tubular member. A visual indicium can be located on only one of the axial-facing surfaces. Prior to assembly of the tubular member and the second tubular member, the visual indicium is configured to be visible to a user after being correctly mounted to the tubular member without the user physically contacting the seal body.

Abstract: An object of the present invention is to provide a gasket capable of ensuring an excellent sealing property by a pair of seal beads oriented in directions axially opposing to each other, regardless of an inserting direction of the gasket into a setting groove.

Abstract: A master cylinder includes a piston seal installed in a circumferential groove. The piston seal includes an annular base section, an inner circumferential lip section protruding from an inner circumferential side of the base section to come in sliding contact with an outer circumferential surface of a piston, an outer circumferential lip section protruding from an outer circumferential side of the base section to abut the circumferential groove, and an intermediate protrusion section protruding from between the inner circumferential lip section and the outer circumferential lip section of the base section to a forward side of the outer circumferential lip section. A step difference section is formed at the outer circumferential side. The circumferential groove has a step section that always abuts an outer circumferential surface of the step difference section.

Abstract: A seal ring is provided for axially sealing two parts arranged so as to be able to move axially with respect to one another. The seal ring has two sealing lips which are arranged circumferentially on an axial first end side of the seal ring. In this context, the sealing lips are designed such that they can be spread apart from one another by a first fluid pressure of a first fluid volume to bear in a sealing manner against mutually opposing sealing faces of a first of the parts. The seal ring also has a sealing projection which is arranged circumferentially on a second end side of the seal ring, oriented axially away from the first end side.

Abstract: A seal arrangement includes an annular energizer backing an annual seal. The seal is disposed about a central axis and has a first seal surface extending in a radial direction, a second seal surface extending in an axial direction, and a back side opposite at least one of the first and second seal surfaces. The annular energizer is made of a resilient compressible material configured to engage the back side of the seal. The seal and the energizer are arranged concentrically about the central axis, and the energizer engages the seal asymmetrically with respect to a radial plane extending through an axial center of the seal to apply a biasing force to the seal biasing the first seal surface in a first radial direction and biasing the second seal surface in a first axial direction.

Abstract: An internal combustion engine having: an engine provided with a crankshaft; a cooling system provided with a circulation pump, which comprises an impeller supported by a pump shaft that is mounted so as to rotate around a rotation axis; an auxiliary shaft, which transmits the rotation movement to the pump shaft of the circulation pump; a mechanical transmission, which transmits the rotational movement from the crankshaft to the auxiliary shaft; and a coupling device, which is interposed between the pump shaft of the circulation pump and the auxiliary shaft and is suited to mechanically connect/disconnect the pump shaft to/from the auxiliary shaft.

Abstract: A ring-shaped gasket for making high-purity fluid pathway connections between opposing fluid delivery apparatus elements having at least one simple flat surface in contact with the gasket. The face of at least one apparatus element typically has a circular counterbore depression to receive the gasket, but is not required. The gasket has a body, pierced through by a hole creating a fluid pathway and defining a radial inner surface, and additionally having a radial outer surface, a first axial end surface and a second axial end surface. At least one of the first and second axial end surfaces has a stress concentration feature radially adjacent to a gasket sealing region, the sealing region constructed to be in contact with a face surface of a corresponding fluid conduit port. The stress concentration feature may be a groove or a plurality of cavities disposed adjacent the gasket axial end surface sealing region.

Abstract: In one aspect, a seal apparatus for use with a mandrel is disclosed that in one non-limiting embodiment contains a seal housing disposed about the mandrel, wherein the seal housing is spaced apart from the mandrel to form a seal gap, a seal member disposed between the seal housing and the mandrel, wherein the seal member is bonded to the seal housing and the seal member is formed from a first material, and a seal support disposed between the seal housing and the mandrel, wherein the seal support is formed from a second material, wherein the second material is stiffer than the first material, and the seal support extends across the seal gap in response to an energizing force applied to the seal support.

Abstract: A ring-shaped gasket for making high-purity fluid pathway connections between opposing fluid delivery apparatus elements having at least one simple flat surface in contact with the gasket. The face of at least one apparatus element typically has a circular counterbore depression to receive the gasket, but is not required. The gasket has a body, pierced through by a hole creating a fluid pathway and defining a radial inner surface, and additionally having a radial outer surface, a first axial end surface and a second axial end surface. At least one of the first and second axial end surfaces has a stress concentration feature radially adjacent to a gasket sealing region, the sealing region constructed to be in contact with a face surface of a corresponding fluid conduit port. The stress concentration feature may be a groove or a plurality of cavities disposed adjacent the gasket axial end surface sealing region.

Abstract: A rotor for a submersible motor includes a shaft and a hub. The hub is: disposed around the shaft, torsionally connected to the shaft, and made from a magnetically permeable metal or alloy. The rotor further includes permanent magnets disposed around the hub; and a polymer shroud encapsulating the permanent magnets and molded to the hub.

Abstract: A power tool and control method is disclosed. The power tool has a striker, which is guided along an axis parallel to an impact direction. A pneumatic chamber has a volume which varies with a movement of the striker along the axis. A valve device that is actuatable depending upon the movement direction of the striker connects the pneumatic chamber with an air reservoir. The valve device is actuated to open in the case of a movement of the striker in the impact direction and in the case of a movement of the striker against the impact direction is actuated to throttle or close. The throttled or closed valve device restricts an air flow flowing through it to a maximum of one tenth of the value as compared to the air flow in an opened position.

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: Master-cylinder seal housed in a groove around a piston has a core connected to three annular and concentric lips. The core rests against a side of the groove and has: a surface provided with an interior edge followed by a peripheral platter cut by at least one channel, and an exterior crown provided with a connection zone formed by an interruption in the crown and deformable due to pressure within the seal to recreate the crown's continuity and impermeability while facilitating purging the brake system when there is no pressure in the channel and the connection zone.

Abstract: Apparatus for controlling a pressurized fluid. In accordance with some embodiments, a valve assembly includes a piston moved between closed and open positions. A sealing member is disposed within an annular recess of the piston and characterized as an endless annular ring extending about a central axis of the piston. The sealing member has an elongated circle cross-sectional shape when the sealing member is in an uncompressed state prior to installation in said recess. The cross-sectional shape is defined by parallel top and bottom surfaces having a length L in a direction perpendicular to and intersecting the central axis, and having opposing inner and outer surfaces of a radius R, the inner and outer surfaces respectively facing toward and facing away from the central axis, and wherein the dimensional value of L is at least five times greater than the dimensional value of R.

Abstract: A cup seal (21) of the invention includes an intermediate lip portion (21d), positioned between an inner lip portion (21b) and an outer lip portion (21c), provided in a base portion (21a). The intermediate lip portion (21d) is configured in such a way that first intermediate lip portions (21d1), communication passages (21d3), second intermediate lip portions (21d2), whose axial direction length is less than that of the first intermediate lip portions (21d1), and the communication passages (21d3), which have no lip portion, are cyclically disposed, in this order, in the peripheral direction. An easy elastic deformation portion of the base portion (21a) which elastically deforms easily is formed by the second intermediate lip portions (21d2) and communication passages (21d3) and, by the easy elastic deformation portion elastically deforming easily when supplying liquid, a flow passage with a larger passage area is formed.

Abstract: Master cylinder for a hydraulic braking circuit, particularly for a motor vehicle, comprising an annular seal (1) placed in a housing (6) of the body comprising an internal dynamic sealing lip (14) surrounding the piston, fitting into an annular groove (20) of the piston when this piston is in a rear rest position, an outer static sealing lip (10) pressing against a wall of the housing, and an additional static sealing lip (16) which presses against a wall of the housing of this seal and with the outer lip defines a small closed volume (V) of liquid.

Abstract: A seal is for sealing a clearance space between first and second members disposed generally coaxially about an axis, one of the two members being linearly displaceable generally along the axis relative to the other one of the two members. The seal includes a generally annular body coupled with the first member, the body having a centerline generally coaxial with the central axis, a sealing surface extending circumferentially about the axis, and a plurality of projections extending generally radially from the sealing surface and into contact with the second member. The projections are spaced circumferentially about the axis so as to define a separate lubrication gap between each pair of adjacent projections. The body is configured to radially deflect when exposed to at least a predetermined fluid pressure such that recessed sections of the sealing surface extending between the projections contact the second member to substantially obstruct the clearance space.

Abstract: A piston device for internal combustion engines includes a first compression ring and a second compression ring in an outer circumference of a piston, wherein the second compression ring includes a notch extending from the inner circumference to the outer circumference on a lower surface of at least one of a pair of ends of the ring, and a gap between the ring ends at the notch on the second compression ring is larger than a gap between the ring ends of the first compression ring, and a gap between the ring ends at the section other than the notch on the second compression ring is the same or smaller than the gap between the ring ends of the first compression ring, and the second compression ring contains an outer circumferential surface comprised of a tapered surface decreasing the ring radial thickness towards the upper side, and an axial parallel surface formed below the tapered surface.

Abstract: A barrier piston with an integrated seal for use with aerosol containers is disclosed. The barrier piston includes a piston body with flow channels disposed on the surface thereof. Stabilizers of a low durometer material are provided on the flow channels to prevent tilting and binding of the piston body within a container. A seal also of a low durometer material is disposed on the base of the piston body to ensure separation of the product and propellant.

Abstract: Method and apparatus for dispensing a fluid using a dispensing container employing an airless pump, which may employ abstract or non-cylindrical shapes. The airless pump uses a chamber enclosing a fluid with a piston comprising a surface of the chamber. The chamber has an interior volume with a substantially uniform cross section along a height of the chamber, to which the piston is conformed allowing the piston to transverse the height of the chamber. The gaps between the piston and the interior of the chamber are sealed with a multi-lobe ring seal.

Abstract: The invention relates to a piston for a piston-cylinder arrangement, particularly a shock absorber piston, which includes a piston body, that has a circumferential surface. A sealing collar has an outer circumferential surface, an inner circumferential surface, a first peripheral surface, and a first sealing lip, and extends around the circumferential surface of the piston body and covers at least part of the circumferential surface in the axial direction. The first peripheral surface connects the two circumferential surfaces to each other at a first end of the sealing collar. The first sealing lip is delimited by the first peripheral surface and the outer circumferential surface, and the first sealing lip is configured evenly in the circumferential direction.

Abstract: A sealing member for a piston slidably disposed within the cylinder bore of a hydraulic system includes a seal body having an outer sealing surface arranged to contact the cylinder bore and a glide ring at least partially disposed within the outer sealing surface of the seal body. The glide ring includes an outer surface and the outer sealing surface of the seal body includes at least one seal lip projecting beyond the outer surface of the glide ring.

Abstract: A sealing ring used for reciprocating motion and having low friction characteristics. The sealing ring is held at one of two members that move relative to each other and slidably in intimate contact with the other. The sealing ring has an end sliding part having an arcuate cross section and slidably in intimate contact with the other and also has a recessed surface formed in at least either a rear face or both side faces in an axial direction. The sealing ring satisfies the relationships of A/2<R<13A2 and 0.5A<C<A, where R is the radius of curvature of the end sliding part, A is the axial width of the sealing ring, and C is the thickness of the sealing ring between the deepest parts of the recessed surfaces.

Abstract: A pneumatically operable fastener-driving tool and seal mechanism assembly, and a method of operating the same, comprises the use of a single, annular seal member, having a substantially V-shaped cross-sectional configuration, disposed within an annularly recessed portion of the fastener-driving tool piston in such a manner that the open region of the V-shaped annular seal member is disposed toward the relatively high-pressure upstream end portion of the fastener-driving tool cylinder, while, conversely, the closed region of the V-shaped annular seal member is disposed toward the relatively low-pressure downstream end portion of the pneumatic tool cylinder Accordingly, the relatively high-pressure air acts upon the radially outwardly flared lip portion of the annular seal member during a power stroke, while relatively low-pressure air acts upon the radially outwardly flared lip portion of the annular seal member during a return stroke, whereby only a single V-shaped annular seal member is required to achieve

Abstract: A gasket includes a damping buffer for a piston that can be charged with a pressure medium and that can be moved back and forth axially in a cylinder pipe and includes at least one static seal for sealing the cylinder pipe vis-à-vis a cover connected to the face of the cylinder pipe and a dynamic seal having at least one dynamically loaded sealing lip that, during the proper use of the gasket, can be laid against the surface to be sealed of a damping journal that is connected to and axially movable back and forth with the piston and that has at least one flow-guiding connection opening that connects the axial faces of the gasket.

Abstract: A piston assembly for use in a viscous material dispenser is disclosed. The assembly has a main body with an axial bore for receipt of a push rod. The body has a face including an annular recess and an endless lip surrounding the recess. A camming washer is disposed at least in part in the recess. The washer includes a perimeteral camming surface engageable with the lip. The body and washer are connected together for limited relative axial movement when the piston assembly is advanced against material in a cartridge to dispense such material. The relative movement is effective to cause the camming surface to force the lip outwardly into tight engagement with a wall of such a cartridge.

Abstract: A dispenser for dispensing a liquid onto a substrate includes a dispenser body having an output and a reservoir in fluid communication with the output, the reservoir being defined by a wall and adapted to hold a supply of liquid to be dispensed. A piston is disposed in the reservoir and adapted to pressurize the liquid so that an amount of liquid is dispensed from the output of the dispenser. The piston includes a base portion having an outer periphery and having a first hardness, and a skirt portion integrally molded to the outer periphery of the base portion and having a second hardness lower than the first hardness. A two-shot molding operation may be used to form the piston with the base portion being, for example, formed in the first shot of the molding operation and the skirt portion being formed in the second shot of the molding operation.

Abstract: To stabilize frictional force to the reciprocating shaft without affecting sealing ability, a sealing device for a reciprocating shaft comprises a main lip 11, a whole periphery of which slidably and tightly contacts with an outer peripheral surface of a shaft 2 reciprocating in the axial direction; and a frictional lip 13, which extends to the sealed space A side from the main lip 11 and slidably and tightly contacts with the outer peripheral surface of the shaft 2 in the state of permitting circulation of sealed fluid, whereby the frictional force of the frictional lip 13 is not varied by pressure of the sealed fluid, while frictional force of the main lip 11 to the shaft 2 is varied by the pressure, the sliding surface is lubricated with the sealed fluid, and reduction of the frictional force by abrasion can be controlled.

Abstract: The present invention provides a resilient, fluid-tight seal for shafts, pistons and the like having a plurality of radially oriented, spaced-apart ribs or webs extending between adjacent oblique circular flanges or features of a seal. The radially oriented ribs or webs provide added stiffness to the flanges or features to prevent them from rolling under during assembly procedures but do not increase the radial spring constant and thus do not appreciably increase the drag created by the seal on a shaft or piston.

Abstract: The invention relates to a piston for a piston-cylinder arrangement, particularly a shock absorber piston, which includes a piston body, that has a circumferential surface. A sealing collar has an outer circumferential surface, an inner circumferential surface, a first peripheral surface, and a first sealing lip, and extends around the circumferential surface of the piston body and covers at least part of the circumferential surface in the axial direction. The first peripheral surface connects the two circumferential surfaces to each other at a first end of the sealing collar. The first sealing lip is delimited by the first peripheral surface and the outer circumferential surface, and the first sealing lip is configured evenly in the circumferential direction.

Abstract: The present invention provides a seal assembly for sealing between two relatively slideable members of non-circular cross-section. A plurality of adjacent seal members may be staggered and grouped within a groove so that all leakage surfaces between the two relatively slideable members are sealed. Multiple seal members or seal member groups may be used to reduce leakage caused by incomplete contact of the seal members with leakage surfaces. An actuator system may comprise various embodiments of the present invention to enable the actuation of one member in relation to another.

Abstract: A sealing device in which a good lubricating oil film is formed along the entire circumference of a sliding surface. The sealing device (1) is fitted in an annular groove formed in either of two elements that are a housing having a shaft hole and a shaft inserted through the shaft hole, and the sealing device (1) seals an annular gap between the two elements. The sealing device (1) has a seal ring (2) sliding against the other element by relative axial movements of the two elements. In the seal ring (2), on each of axially opposite ends of a sliding surface (20) sliding against the other element, there are formed grooves (22) extending from an end surface (21) of the seal ring (2) toward the axial center of a sliding surface (20).

Abstract: A sealing device for a reciprocating shaft capable of providing sufficient pressure tightness to a main lip and preventing troublesomeness of an assembling operation. The sealing device, which is interposed between a shaft and an outer peripheral member, includes a washer, a main lip integrally bonded to a sealed space side of the washer and slidably brought into close contact with an outer peripheral surface of the shaft, an auxiliary lip integrally formed in an outer peripheral side thereof, a backup ring fitted between an atmosphere side of a slidable surface of the main lip and an inner peripheral portion of the washer, and bearing the main lip from the atmosphere side and the inner peripheral side, a dust lip integrally bonded to the atmosphere side of the washer and slidably brought into close contact with the outer peripheral surface of the shaft, and an outer peripheral lip integrally bonded to an outer peripheral portion of the washer and brought into close contact with the outer peripheral member.

Abstract: The invention relates to a sealing collar for a cylinder-and-piston unit, wherein the sealing collar is essentially received in a groove that is inserted into the cylinder or the piston, respectively, and the sealing collar comprises two sealing lips, the first sealing lip thereof being acted upon dynamically and making catch at the piston or the cylinder, respectively, while the second sealing lip thereof is acted upon statically and rests on a bottom of the groove. It is the core of the invention that the sealing collar includes a circumferential extension that extends in parallel to the sealing lips, is arranged radially between the first sealing lip and the second sealing lip and projects from the sealing lips in an axial direction.

Abstract: A generally circular compression piston ring having an outer peripheral surface, an inner peripheral surface, and a pair of end faces splitting the circular shape in a radial direction thereof for defining a gap portion. The ring has a first portion including a notched portion formed at the inner peripheral surface and extending over a predetermined circumferential length portion starting from the end face, and a second portion other than the first portion. The second portion has a radial thickness ranging from 2.0 mm to 6.0 mm. The notched portion is a plane shape gradually reaching the outer peripheral surface toward the end face. The end face has a radial thickness ranging from 0.2 times to less than 0.5 times as large as the radial thickness of the second portion. The outer peripheral surface defines a center serving as a center of a center angle, and the predetermined circumferential length portion is defined by the center angle ranging from 26.5 degrees to 14 degrees.

Abstract: An improved seal/bearing arrangement employs an O-ring type seal which has segmented fingers. The seal ring has a recess which is sized to mate with a corresponding projecting lug of a bore use, for example, in brake actuator mechanisms. The seal ring can be made from synthetics such as polyamides and polyethylenes. The fingers are so arranged that locking of the seal rings in the bore occurs with insertion of a sliding, oscillating and/or rotating shaft or the like through the rings.