Abstract: The invention relates to a sealing assembly for the limitation of fluid flow along a rotatable shaft that is passed through a housing member that separates a high pressure side and a low pressure side, wherein the sealing assembly comprises: a rotor with a sealing surface which essentially extends radially in relation to the shaft, a flushing sealing system that extends between the rotor and the housing member, which sealing system is in contact with both the housing member and the sealing surface of the rotor to effect a sealing effect, wherein the flushing sealing system comprises an elastic sealing member that in use imposes a targeted compression force on the sealing surface.

Abstract: A seal that can be used alone or as a containment seal for another seal includes a primary ring (36) and a mating ring (30), the primary ring being axially shiftable relative to a rotating shaft (12) and the mating ring being axially fixable relative to the rotating shaft, a biasing mechanism (500) that urges the primary ring toward the mating ring, and an annular flexible sealing membrane (100). The membrane includes a flange portion (102) disposed at least partially between the biasing mechanism and the primary ring, a coaxial portion (104) that is axially fixable relative to the shaft, and a flexible connection portion (106) positioned within a radially inward extent of the flange portion and connecting the flange portion to the coaxial portion.

Abstract: A mechanical seal assembly adapted for arrangement around a rotating shaft of a rotating device and has first and a second seal rings. The assembly also includes an annular carrier having a base and a removable end portion configured to be affixed to a housing of the rotating device. The assembly also includes an annular flexible sealing membrane. The membrane includes an outer portion arrangeable between the first seal ring and a biasing mechanism and that is axially shiftable relative to the rotating shaft. The membrane also includes an inner portion surrounded by the outer portion and positioned between the base and the removable end portion of the annular carrier and the base and a removable end portions hold the inner portion in fixed relative to the annular carrier as the outer portion shifts relative to the rotating shaft.

Abstract: Disclosed are a sealing structure and a scroll air compressor having the same. The sealing structure includes an orbiting scroll including an orbiting scroll spiral tooth, the orbiting scroll spiral tooth being provided with an orbiting scroll spiral tooth groove, an orbiting scroll wear-resistant sealing strip being provided in the orbiting scroll spiral tooth groove, a stationary scroll including a stationary scroll spiral tooth matched with the orbiting scroll spiral tooth, the stationary scroll spiral tooth being provided with a stationary scroll spiral tooth groove, a stationary scroll wear-resistant sealing strip is provided in the stationary scroll spiral tooth groove, the wear-resistant sealing strip is divided into sections including a high-temperature and high-pressure section and a medium-temperature and medium-pressure section.

Abstract: Systems and methods are disclosed that include providing an outer tubular member, an inner tubular member telescopically disposed within the outer tubular member, and an annular seal disposed between the outer tubular member and the inner tubular member, the annular seal being resilient to permit relative movement between the outer tubular member and the inner tubular member, and the annular seal having in a radial cross-section: a first annular leg portion terminating at an end that is radially inward or radially outward, the first annular leg portion comprising a first open loop; and a second annular leg portion extending from the first annular leg portion and terminating at an end that is the other of radially inward or radially outward, the second annular leg portion comprising a second open loop.

Abstract: A face seal includes a seal carrier defining an axis and having a pilot flange, a seal element disposed at least partially in the seal carrier, and a retaining plate connected to one axial end of the seal carrier. The retaining plate has an axial step disposed circumferentially about the retaining plate. The axial step is interfaced with the pilot flange.

Abstract: The invention relates to a mechanical seal assembly, comprising: a mechanical seal (10) including a rotating mechanical sliding ring (2) and a stationary mechanical sliding ring (3), defining a sealing gap (4) between them, a sliding ring carrier (5) arranged at the rotating mechanical sliding ring (2), at least one driver element (6) arranged between the rotating mechanical sliding ring (2) and the sliding ring carrier (5) and provided for transmitting a torque from the sliding ring carrier (5) to the rotating sliding ring (2), wherein the rotating sliding ring (2) is clearance-fitted into the sliding ring carrier (5), wherein the rotating sliding ring (2) comprises a first recess (20), wherein the sliding ring carrier (5) comprises a second recess (50), and wherein the driver element (6) is clearance-fitted into the first recess (20) and is clearance-fitted into the second recess (50).

Abstract: A scroll compressor is provided, comprising: a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position and a disengagement position; a main bearing housing adapted to support the compression mechanism; a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; and a first sealing means provided between the back pressure chamber and a suction zone of the compression mechanism and capable of maintaining sealing when the orbiting scroll member is axially displaced.

Abstract: The invention relates to a mechanical seal arrangement, comprising a rotating slide ring (11) and a stationary slide ring (12), which define a sealing gap (13) in between them, and a bellows unit (2) with a bellows element (3) and an intermediate disc (4), wherein the bellows element (3) has a first connector area (31), a second connector area (32), and a bellows intermediate area (33), wherein the bellows element (3) is made of an elastomer material and provides a connection between the rotating slide ring (11) and a rotating structural component (10), wherein the intermediate disc (4) is arranged between the bellows element (3) and the rotating slide ring (11), and wherein the intermediate disc (4) has at least one slit (47) that has a slit width (B) that is smaller than a slit length (S), and wherein the slit (47) is closed at one side, so that a connection area (49) remains at the slit (47) at the intermediate disc (4).

Abstract: A sealing apparatus includes an annular lip member made of a resin material, and an annular spring member made of a metal material. The lip member includes a lip base portion, an outer-periphery-side lip, and an inner-periphery-side lip. The spring member includes: a spring base portion having an annular shape about an axis; an outer periphery pressing portion for pressing the outer-periphery-side lip; and an inner periphery pressing portion for pressing the inner-periphery-side lip. The spring member is accommodated in an accommodating groove. The outer periphery pressing portion includes a plurality of outer periphery pressing pieces, and the inner periphery pressing portion includes a plurality of inner periphery pressing pieces.

Abstract: Compliant bellow seal may be axially disposed between first and second cooling plates bounding first and second cooling passages between cooling plates and first and second stage disks in turbine. Bellow seal includes two or more convolutions with oppositely facing forward and aft sealing surfaces, which may be flat, on forward and aft annular sealing walls and cylindrical annular outer and inner contact and sealing surfaces on and facing radially outwardly or inwardly from one of the convolutions. A snake bellow seal embodiment may have at least two of the convolutions being full convolutions of unequal width and a forwardmost partial convolution including the sealing wall. Bellow seal may allow turbine cooling flow from an inter-stage radial face spline to flow through inner openings of second cooling passage and block first stage disk cooling air from flowing through inner openings of first cooling passage.

Abstract: An adjustable spacer with hardened end portions and a non-hardened intermediate portion therebetween is mountable between a pair of roller bearings also mounted on a shaft such an axle or spindle or the like. The hardened material contacts the faces of the roller bearings but helps prevent wear therebetween and unwanted movement of the bearings on the shaft. The unhardened material allows the spacer to collapse in the axial direction to maintain desired axial loads on the bearings.

Abstract: Sealing configurations with active cooling features are provided. A forward sealing configuration may comprise a forward bellows spring configured to interface with a forward seal plate. An aft sealing configuration may comprise an aft bellows configured to interface with an aft seal plate. The forward bellows spring and the aft bellows spring may be configured to provide an axial force against each respective seal plate. The forward seal plate and the aft seal plate may include cooling holes configured to deliver a lubricating fluid to each respective seal interface to provide active cooling to each respective sealing configuration.

Abstract: A seal assembly is disclosed. A seal assembly may comprise a seal carrier, a compliant structure comprising a first end and a second end, wherein the first end is coupled to the seal carrier, and/or a support structure coupled to the second end. The seal carrier may be integral with the compliant structure.

Abstract: Methods and systems for controlling infiltration of ambient air into, and exfiltration of process gas out of, an organic Rankine system. A system comprises a first sealing mechanism configured to seal at least one shaft against exfiltration of a process gas when the turbomachine is operating. The system further comprises a second sealing mechanism configured to seal the at least one shaft against infiltration of ambient air when the system is in a standstill mode. The system further comprises one or more pressure sensors configured to detect a pressure of gas within the system to monitor whether infiltration of ambient air has occurred and a system purge is needed.

Abstract: A seal designed for insertion between a rotating shaft and a fixed casing having an opening through which the shaft is fitted, the seal having a sleeve designed to fit onto the shaft; a first sealing ring fitted to the sleeve; a cup designed to fit inside the opening; and a second sealing ring connected to the cup by a bellows of elastomeric material; the first and second sealing rings cooperate frontally with each other under the axial load exerted by a spring interposed between the cup and the second sealing ring; and the bellows is connected in angularly free manner to the cup to prevent self-induced torsional oscillation and noise resulting from it.

Abstract: An adapter for fixing a traditional tattoo needle tube and grip with a tattoo machine of the type having a threaded collar includes a tube holder having a longitudinal bore, a nut-retaining flange at a proximal end thereof, and a tube retaining mechanism at a distal end thereof. A first threaded nut is retained by the nut-retaining flange at the proximal end of the tube holder and adapted for fixing with the threaded collar of the tattoo machine. As such, with the first threaded nut fixed with the threaded collar of the tattoo machine, and with the tattoo needle tube and grip fixed with the tube holder by the tube retaining mechanism, the tattoo needle tube and grip are fixed with the tattoo machine.

Abstract: A mechanical expelling mechanism for an axial pump system in a loop reactor includes straight or curved repelling vanes mounted to a vertical or tapered rear face of the impellor hub and a tapered wall provided in the adjacent seal housing. In combination, these elements exclude and eject process slurry, especially polymer solids, away from the seals and bearings, and thereby prevent damage to the seals and bearings, at least until a flow of flushing fluid can be restored. The repelling vanes further serve to circulate and exchange any process fluid and catalyst that remains in the space between the impellor and the seals, so that localized warming and run-away formation of polymer solids near the seals is avoided. The repelling vanes can be curved or straight. In embodiments, the repelling vanes reduce pump efficiency by less than 1%.

Abstract: A mechanical seal for providing a fluid-tight seal between relatively rotatable elements includes a stationary part for securing to a housing, which has a stationary seal face, a rotary part for securing to a shaft, which includes a rotary seal face, a spring urging the rotary seal face into engagement with the stationary seal face and a toroidal sealing member between the rotary component and the shaft. The toroidal sealing member is accommodated within a recess of the rotary part, and the recess is defined by two members of which the first rotary part member includes the seal face and a second rotary part member is positioned between the first rotary part member and the spring.

Abstract: An integrated shaft bearing assembly is provided having a housing with at least one bearing located in the housing that supports a shaft that extends through the housing. A vent ring is located at one axial end of the housing, with the vent ring having a radial flange that extends toward the shaft. A face seal assembly including a seal support ring is fixed on the shaft. The face seal assembly includes a bellows spring connected to the seal support ring, a face seal carrier connected to the bellows spring, with the face seal carrier supporting a face seal against the face of the radial flange. Here the vent ring is integrated with the integrated shaft bearing and provides a surface for the mechanical seal as well as venting to avoid pressure build up in a region of the mechanical seal between the mechanical seal and the bearing.

Abstract: A seal assembly for providing a seal between a pair of relatively rotatable components has; a first seal ring (30) mounted in sealing relationships, non-rotatably and for limited axial movement on a first of the components; a second seal (50) ring mounted in axially aligned relationship to the first seal ring, said second seal ring being mounted in sealing relationship, non-rotatably and for limited axial movement on a second of the components; first resilient means associated with the second seal ring urging it axially towards the first seal ring, second resilient means (40) acting on the first seal ring urging it away from the second seal ring to separate the first and second seal rings; and a centrifugal actuator (19) associated with the first seal ring, said centrifugal actuator comprising a radially extending chamber (38) between the first seal ring and the component associated therewith, said chamber being connected to a source of fluid, whereby when the components rotate relative to one another with fl

Abstract: A mechanical seal has a stationary face and rotating assembly adjacent to the stationary face. The rotating assembly includes an upper bellows ring, a lower bellows ring and a runner between the lower bellows ring and the stationary face. A bellows extends between the upper bellows ring and the lower bellows ring. In preferred embodiments, the bellows is constructed from a perfluoroalkoxy polymer and is secured within the upper bellows ring and the lower bellows ring by a selected locking mechanism. The locking mechanism may include the use of crimp rings configured for a press fit engagement within the upper and lower bellows rings. Alternatively, the locking mechanism may employ locking rings configured for threaded engagement with the upper and lower bellows rings.

Abstract: A jet pump which can restrain self-excited vibration in a connection portion between an inlet mixer pipe and a diffuser pipe without inhibiting a structural deformation due to thermal expansion and the like includes a slip joint structure connecting the inlet mixer pipe and the diffuser pipe to each other by inserting the inlet mixer pipe into an upper end opening of the diffuser pipe with a clearance left therebetween; and a self vibration damping structure configured such that when the clearance defined by an outer pipe wall of the inlet mixer pipe and an inner pipe wall of the diffuser pipe is widening or narrowing due to vibration of the inlet mixer pipe or the diffuser pipe, a flow path resistance inside a clearance flow path for pumped coolant water defined by the clearance is not smaller than a fluid inertia force all over the clearance flow path.

Abstract: A seal assembly for use in a gearbox has a rotating ring to be secured to a shaft, and having a contact face. The contact face abuts a stationary seal. The stationary seal has a retainer with a channel extending to a bottom. A floating seal portion is positioned within the retainer, with a spring positioned inward of an inner end of the floating seal portion, and biasing the floating seal portion outwardly. There is an inner bore of the retainer which is spaced from an outer periphery of the floating seal portion. One of the inner bore and the outer periphery presides with the plurality of radially located pins. The other of the inner bore and the outer periphery is formed with the plurality of recesses. The pins are received in the recesses, to prevent rotation of the floating seal portion within the retainer.

Abstract: A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device includes one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.

Abstract: Provided is a gas seal assembly which includes: an inner sleeve in which a rotation axle is inserted; a rotational sealing sleeve inserted into the inner sleeve; a sealing sleeve contacting the rotational sealing sleeve; a forcing sleeve forcing the sealing sleeve towards the rotational sealing sleeve by contacting the sealing sleeve; a seal housing separated by a predetermined distance from the forcing sleeve and the sealing sleeve and supporting the forcing sleeve; and an elastic part mounted between the seal housing and the forcing sleeve and providing a restoring force to the forcing sleeve, wherein the seal housing protrudes in a center direction of the rotation axle and includes a supporting protrusion for supporting one end of the forcing sleeve.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: A turbomachine including an annular combustion chamber, a sectorized turbine nozzle arranged at an outlet from the chamber, and a sealing mechanism interposed axially between the chamber and the nozzle, the sealing mechanism including an annular gasket that is axially resilient. The gasket includes a first axial bearing mechanism for bearing against a downstream end of the chamber and a downstream annular lip that is sectorized, each sector of the downstream lip being in alignment with a sector of the nozzle and including a second axial bearing mechanism for bearing against an upstream end of the nozzle sector.

Abstract: A cartridge-mechanical seal includes a first recess provided on an end face of a seal cover. A second recess is provided on an outer circumference of a collar. A set plate fixed to the end face of the seal cover. When the set plate is fixed, a projection is inserted in the first recess and in contact with the rotary shaft's side face of the first recess, and an end of the set plate is in contact with the bottom of the second recess, whereby positioning of the seal cover and the collar with respect to a radial direction is achieved.

Abstract: A axial face seal assembly includes first and second structures rotatable relative to one another about an axis. A carrier supports a seal that engages the second structure. The carrier is configured to move along the axis. First and second springs operatively are arranged between the first structure and the carrier. The first and second springs are configured to bias the carrier relative to the second structure respectively in first and second directions along the axis for providing a desired closing force on the second structure. A method of sealing a rotating structure includes biasing a seal toward a rotating sealing surface with a first spring to provide a desired axial closing force. The axial position of the seal relative to the rotating sealing surface is changed to an undesired axial closing force. The seal is biased with a second spring to achieve the desired axial closing force.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: A compression unit (108) for a mechanical seal, comprising a hollow cylinder (112) having a first end (317), a second end (321), a seal face (111) attached to the second end (321), and a resilient region (210) between the first end (317) and the second end (321), characterized in that the resilient region (210) is defined by a plurality of helical slots (201) passing completely through the cylinder's (112) wall, each of the slots (201) having a distinct starting (206) and end point (207) such that the slots (201) co-axially coiled around the cylinder (112) and the starting (206) and end point (207) for each helical slot (201) are spaced around the periphery of the cylinder (112).

Abstract: A seal system including a sleeve configured to receive a rotatable shaft therein and a dynamic race configured to be rotatably coupled to the shaft. The seal system further includes a biasing element configured to urge the dynamic race into engagement with a static race to form a primary seal, and a shroud configured to be rotatably coupled to the sleeve and positioned radially outside the biasing element. The seal system also includes a sealing element configured to be positioned radially inside the biasing element and to sealingly engage the sleeve to provide a secondary seal to generally block fluid bypassing the primary seal.

Abstract: A seal assembly (80) adaptable for use between swivel ducts (36, 38, 40) or between a swivel duct (36) and an exhaust duct (81), has a seal (84), a seal carrier (82) and a spring (98). The spring is maintained between the seal carrier and the seal by means of a seal carrier spring holder (88) and a seal retention holder (96) such that the spring urges the seal away from the seal carrier to land the seal on an adjacent swivel duct (40).

Abstract: Screw type liquid ring pump including a pump housing (9) with an inlet part (3) and an outlet part (11) and rotating helical screw rotor (8) inside the housing. The rotor is connected with a shaft (7) as well as a driving unit in the form of motor, preferably an electric motor (2), whereby the pump (20) with the pump housing (9) represents an elongation of the motor (2) with the motor housing thus representing an integrated or one piece unit. The shaft seal (22, 23) is provided wholly or partially in an annular space (24) provided within the rotor (8), whereby one end of the seal rests against an annular part (25) of the screw rotor provided in the annular space (24) between the rotor and the shaft, and its other end is tightly engaged against an inwardly protruding part (21) at the outlet end of the pump.

Abstract: The present invention provides a mechanical seal device, capable of sealing special fluid such as chemicals, easy to be mounted to a device and small in size. The mechanical seal device comprises a seal cover, a first seal ring axially-movably arranged in an inner circumference side of the seal cover, a second seal ring fixed to a rotary shaft, a spring arranged in the inner circumference side of the seal cover and pressing the first seal ring in a direction toward the second seal ring and a bellows mounted to the inner circumference side of the seal cover and axially-expandably mounted between the seal cover and the first seal ring. The spring is mounted to the seal cover along the axial direction in which the bellows is expanded and contracted.

Abstract: The present invention relates to a front mechanical seal for pumps with frictional rings and fluid lubrication, of the type comprising a ‘rotary seal’ (B) mounted on a support collar, formed of a first collar (1) and a second collar (2) prismatically coupled by means of one or more tongues (3) obtained on the second collar (2) and contained in corresponding housings (4) obtained on the first collar (1).

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: Apparatus for creating a seal between an axle journal and a bearing housing is disclosed, particularly for use in apparatus for dewatering or washing material suspensions. The apparatus includes a stator ring, a pair of diagonally disposed guide pins supporting the stator ring with respect to the bearing housing so that the stator ring can be angled in a plane with respect to the pair of guide pins, a sealing ring for creating a seal between the stator ring and the axle journal, a bellows for creating a seal between the bearing housing and the stator ring, and at least one resilient member for urging the stator ring in abutment against the sealing ring.

Abstract: A mechanical composite seal assembly for providing a seal between a rotating shaft and a static surface. The mechanical composite seal assembly includes first and second axially adjacent annular seal elements. The first and second seal elements each include a sealing edge contacting the shaft to provide a respective seal between the first and second seal element and the shaft. A static housing receives the first and second seal elements and engages the static surface to provide a static stationary seal, while concomitantly providing a flex region that engages the seal elements to form a dynamic seal therewith.

Abstract: An improvement in a seal assembly for sealing with a rotatable component extending within the seal assembly and defining a longitudinal axis of rotation, the seal assembly being of a type including a seal element retained by a seal housing, where one of the seal element and the seal housing is constructed from a compressible material, where the seal element includes a seal engagement surface and where the seal housing includes a housing engagement surface. The improvement includes one of the seal engagement surface and the housing engagement surface being comprised of the compressible material and the other being oriented in a plane normal to the longitudinal axis of rotation of the component extending within the seal assembly and defining a depression for providing an isolated gap between the seal engagement surface and the housing engagement surface for receiving the compressible material to restrain movement of the seal element relative to the seal housing.

Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end providing a radial width. The radial width is between greater than 0.15 inch (3.81 mm).

Abstract: A wiper seal for preventing leakage of oil between advance and retard chambers formed between rotor vanes and stator lobes in a vane-type camshaft phaser is a monolithic structure made from a single material that includes a wiper element and a compressible spring element extending from the wiper element. The spring element is designed as a cantilevered arm and provides a sealing pressure to the wiper element. The wiper seal may further include a rib element as part of the monolithic structure that vertically extends the wiper element towards the spring element. The rib element assists in preventing over-compression of the cantilevered arm and in preventing tangling of a plurality of wiper seals during handling and shipping. The wiper seal is provided at the tip of each rotor vane and/or stator lobe of a vane-type camshaft phaser for varying the timing of combustion valves in an internal combustion engine.

Abstract: A sealing arrangement is provided, including a sealing ring for sealing two machine elements from one another, the sealing ring being configured in an installation space for the second machine element that is open toward the first machine element to be sealed, and sealingly contacting the surface to be sealed of the first machine element, by way of at least one dynamically loaded first sealing lip. The sealing ring is arranged under elastic axial and radial preloading within the installation space.

Abstract: A displacer unit with a valve plate body is disclosed. The displacer unit having at least one displacer space which is arranged in a cylindrical drum rotating about an axis of rotation and which can be connected to an inlet connection and an outlet connection by means of a control surface. The control surface is formed on a valve plate body which is provided with a first control opening, which is connected to the inlet connection, and with a second control opening, which is connected to the outlet connection. The first control opening and the second control opening are spaced apart radially, where the displacer space can be connected to the first control opening by a first connecting passage and to the second control opening by a second connecting passage. The connecting passages are provided with a respective mechanical face seal for sealing relative to the control openings.

Abstract: A metal face seal for an earth boring drill bit where the drill bit has a bit body, at least one bit leg, a bearing pin on each bit leg, and a cone rotatably mounted on each bearing pin. The metal face seal is located in the cavity formed between the interior surface of the cone and the bearing pin. The metal face seal consists of a rigid seal ring having a forward surface that engages a rotating seal surface of the cone. An energizer ring biases the rigid seal ring toward the rotating seal surface. A secondary seal engages the bearing pin surface, the energizer ring, and the rigid seal ring. The secondary seal ring has a protuberance on its forward side for filling void spaces between the energizer ring, the rigid seal ring, and the secondary seal ring.

Abstract: A scroll fluid machine includes a stationary scroll having a spiral wrap formed on an end plate and a moving scroll having a spiral wrap formed on an end plate. A polymer actuator for adjusting the amount of space between the wrap and the end plate is disposed in a recess formed at a tip of the wrap. The polymer actuator changes its shape along a height of the wrap to adjust an amount of the space. The polymer actuator also functions as a seal between the end plate and the wrap. The recess is formed such that a wall of the recess including an inner circumference surface of the wrap has a thickness different from that of a wall of the recess including an outer circumference surface of the wrap.

Abstract: A mechanical seal having a stationary ring and a rotating portion. The rotating portion includes a runner adjacent the stationary ring, an elastomer bellows adjacent the runner, a spring retainer plate and a spacer positioned between the elastomer bellows and the spring retainer plate. The spacer sets and maintains the elastomer bellows in proper position adjacent the runner.

Abstract: A mechanical seal comprises a first case member that is mounted on a rotatably supported rotatable shaft and that rotates together with the rotatable shaft, a second case member that is mounted on a member supporting the rotatable shaft and that forms a space between the first case member and the second case member, a first seal member that is mounted on the first case member, an urging member that is mounted on the second case member, a second seal member that is arranged concentrically with the first seal member and that is pushed against the first seal member with being urged in an axial direction of the rotatable shaft by the urging member, and a transmitting member that transmits an urging force of the urging member to the second seal member, and the urging member is arranged both concentrically with the second seal member and near the second seal member in its radial direction.

Abstract: A jet pipe assembly containing at least one joint provided with a seal assembly to isolate, substantially, the fluid flowing in the pipe from the fluid external to the pipe. The dynamic member of the seal assembly is provided with both radial and cylindrical sealing surfaces.