Abstract: A pump comprises: at least one rotor rotatable about an axis of rotation; a pump housing surrounding the rotor, wherein a pump channel is formed between a radially inner surface of the pump housing and a radially outer surface of the rotor; and a seal assembly that seals the pump channel to an end surface of the rotor. The seal assembly comprises: a sliding surface which is provided on one of the rotor and the pump housing and which extends perpendicular to the axial direction of the rotor; a static surface provided on the other of the rotor and the pump housing; and a first elastomer element attached to the static surface and pressed against the sliding surface in the axial direction.

Abstract: A connector includes a first port, a second port, a first sealing member and a second sealing member. The first port and the first pipe sleeve portion are connected with each other such that at least a part of the first port and at least a part of the first pipe sleeve portion engage with each other by fitting and overlap with each other, and a first sealing member is positioned between two overlapping portions. The second port and the second pipe sleeve portion are connected with each other such that at least a part of the second port and at least a part of the second pipe sleeve portion engage with each other by fitting and push each other, and a second sealing member is positioned between two pushing portions.

Abstract: An impact tool includes a housing having a handle portion defining a first axis, a motor supported by the housing and defining a motor axis, and a rotary impact mechanism arranged on a second axis that is perpendicular to the first axis. The rotary impact mechanism is configured to convert a continuous rotational input from the motor to consecutive rotational impacts upon a workpiece. The rotary impact mechanism includes a chamber containing a hydraulic fluid, an anvil positioned at least partially within the chamber, and a hammer for imparting the consecutive rotational impacts upon the anvil. The hydraulic fluid is configured to attenuate a noise of the rotary impact mechanism that is created by the hammer impacting the anvil. The impact tool further includes a gear train that receives torque from the motor and includes a rotational input that transfers torque to the rotary impact mechanism.

Abstract: An apparatus has: a first member; a shaft rotatable relative to the first member about an axis; and a seal system. The seal system has: a seal carried by the first member and having a seal face; a seal carrier; a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face; and one or more springs biasing the seal carrier relative to the first member so as to bias the seal face against the seat face. The seal carrier has: an axially-extending wall having an inner diameter (ID) surface; and a radially-extending wall having a first surface. The seal carrier axially-extending wall ID surface has a radially inwardly open groove having a first sidewall and a second sidewall and a base. A wave-form split ring contacts the first sidewall and biases the seal into engagement with the radial wall first surface.

Abstract: A mechanical seal that employs an axially movable spring holder plate that engages a sealing element, such as an O-ring, associated with a stationary seal ring. In turn, the stationary seal ring can have a sealing face that engages with a sealing face of a rotary seal ring. The rotary seal ring can also have a sealing element, such as an O-ring, associated therewith. The O-rings are initially disposed in an unloaded position where they are not radially compressed and hence the ends do not expand circumferentially past the end faces of the holder or gland segments. The spring holder plate can be moved axially by tightening selected bolts associated therewith. When moved axially, the spring holder plate moves the stationary seal ring and the O-ring associated therewith in an axially inboard direction, thus placing the O-rings in a loaded position, where the O-rings are radially compressed.

Abstract: In an exemplary embodiment, a sliding component includes an annular stationary side seal ring 5 fixed to the stationary side and an annular rotating side seal ring 3 to be rotated together with a rotating shaft, in which by relatively rotating opposing sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, a silicate-containing sealed fluid present on one side in the radial direction of the relatively rotating sealing faces S is sealed, wherein an amorphous carbon film 8 formed by using a hydrocarbon gas containing no silicon compound is provided on at least any one of the sealing faces S of the stationary side seal ring 5 and the rotating side seal ring 3, and content of silicon of the amorphous carbon film 8 is 1.5 at % or less.

Abstract: A circumferential seal assembly capable of dividing a gas into separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The assembly includes an annular seal housing, a rotatable runner, a pair of annular seal rings, and a plurality of groove structures. Each groove structure separates a source flow communicated into a feed groove so that a portion enters at least two grooves to form a longitudinal flow therein. Each groove includes at least two adjoining steps defined by base walls. The base walls are arranged along the groove to decrease depthwise opposite to rotation of the rotatable runner. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects the longitudinal flow to form an outward radial flow in the direction of one annular seal ring. The base walls are bounded by and intersect a pair of side walls.

Abstract: A gas seal, in particular dry gas seal, which extends in a circumferential direction with respect to an axis, has a rotating slide ring and a stationary slide ring, wherein the stationary slide ring is axially movable. The gas seal has a slide sleeve and a pressure element which bears against the stationary slide ring at a first contact surface by a second contact surface, wherein, by the pressure element, an elastic element axially presses the stationary slide ring by way of the sealing surface of the latter against the rotating slide ring. The seal is arranged at least partially with a fastening portion between the two portions. The first portion is metal, the second portion is ceramic, and the slide sleeve is ceramic.

Abstract: A gas seal which extends in a circumferential direction in an axis has a rotating slip ring and an axially movable stationary slip ring. A slip sleeve guides the stationary slip ring in the axial movement direction by a first sliding face on a second sliding face. The slip sleeve is fastened to a stator of the gas seal, wherein the slip sleeve has a first recess extending in the circumferential direction, and the stator has a second recess, opposite the first recess in the region of the fastening, extending in the circumferential direction, such that the first recess and the second recess define a common cavity extending in the circumferential direction. In the cavity there is an elongate fixing element which at least partially fills the first recess and the second recess such that an unlimited axial relative movement is only possible when the fixing element is radially deformed.

Abstract: A seal assembly for a gas turbine engine includes a first member including a first seal land for contacting a first structure. A second member includes a second seal land for contacting a second structure and a third seal land for contacting a third structure. The first member and the second member form a pivotable connection.

Abstract: A motor and a coupler disposed therein are provided. The motor includes a housing, a stator disposed in the housing, a rotor rotatably disposed inside the stator, a rotating shaft which integrally rotates with the rotor, a bearing which supports the rotating shaft, a bracket disposed at an upper portion of the housing, wherein the bearing is mounted in the bracket, and a coupler disposed at an upper end portion of the rotating shaft which passes through and protrudes from the bracket, wherein the coupler is in contact with the bracket due to a pressure generated when an external system is coupled with the coupler. Accordingly, damage to the bearing and noise occurrence are prevented in advance in the motor including the coupler.

Abstract: A seal system includes a face seal rotor ring including a wide sealing face preferably made of tungsten carbide. The stator ring includes a narrower sealing face confronting the rotor ring wide sealing face. The stator ring sealing face is preferably made of polyamide-imide and tapers to narrower widths rearwardly.

Abstract: A ball joint has a dust cover fitted onto the outer periphery of a socket formed into the shape of a cylinder with a bottom. The socket has a dust cover groove into which a socket-fitting portion of the dust cover is fitted, and a dust cover-recieving surface for supporting a socket-facing surface of the dust cover. The dust cover-recieving surface inclines toward the socket-facing surface while extending from the outer side toward the inner side. Radial projections are formed on the inner peripheral surface of the socket-fitting portion of the dust cover. An axial projection which projects toward the dust cover-recieving surface is formed on the socket-facing surface of the dust cover.

Abstract: A pressure measurement device in a tube (30) of a hydraulic circuit is disclosed, comprising a metal collar (2) provided with n (?3) contact stops (22, 24, 26) made of an electrically insulating material, designed to come into contact with the wall of said tube, preventing the metal of the collar coming into contact with this wall, one of the contact stops (22) comprising a passage (22?) that will connect the atmosphere inside said tube with pressure measurement means.

Abstract: The invention includes a grain separator with a seal system. The seal system includes an elastomeric portion and an inelastomeric portion. The seal system interfaces with an inlet spout at at least two locations. The seal system is rotatable about an inlet spout. A sealing pressure is increased as grain interacts with the seal system.

Abstract: A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly.

Abstract: The invention relates to a mechanical seal arrangement comprising a rotating slide ring (2) and a stationary slide ring (3) which define a sealing gap (4) between them and a bandage (15) which is arranged on the outer surface of at least one of the slide rings, the slide ring (2) on which the bandage (15) is arranged comprising a step (25), which extends completely on the outer circumferential face in the circumferential direction and has a contact face (26), and an end face (17) of the bandage (15) lying against the contact face (26) of the step (25).

Abstract: A particulate exclusion mechanism for a gas lift off seal includes a band fixed to the stationary seal face and extending over the lift off region between the stationary and rotating seal faces, thereby forming an annular cavity surrounding the lift off region that traps barrier gas therein as it leaks through the lift off region and inhibits process fluid from entering the annular cavity and reaching the lift off region. The band can be made of a non-abrasive material such as PTFE or PEEK. The band can extend over the rotating seal face, and a portion of the band can be sufficiently flexible to allow the extended end of the band to constrict in diameter and contact the rotating seal face if the process pressure exceeds the barrier gas pressure. The extended end can include a thicker terminating portion that minimizes clearance with the rotating seal face.

Abstract: An adjustment mechanism (85) for a seal assembly (80) for a pump drive shaft (52) of a pump, the pump shaft (52) mounted for rotation about a rotation axis. The seal assembly (80) comprises a rotating seal (81) mounted for rotation with the drive shaft (52) about the rotation axis and a static seal (84) adjacent the rotating seal (81) and axially moveable relative thereto. The adjustment mechanism (85) comprises an adjustment member (87) which is axially moveable so as to cause axial movement of the static seal (84) relative to the rotating seal (81). The mechanism further includes an actuator (88) and a transmission (93) for transmitting a motive force from the actuator to the adjustment member as a result of activation of the actuator. The transmission (93) is operatively connected to the adjustment member (87) at two spaced apart couplings (98) whereby activation of the actuator causes simultaneous transmission of the motive force to the two spaced apart couplings.

Abstract: A shock absorber has an inclined surface that is inclined to a moving direction of the free piston in at least one of a free piston contact surface of a free piston with which an elastic body is in contact and a housing contact surface of a housing with which the elastic body is in contact. A shortest distance between the free piston contact surface and the housing contact surface is changed by movement of the free piston.

Abstract: A sealing device for a collet chuck has a tensioning nut, a sealing washer, a main sealing ring and a pressure space. The sealing washer is mounted in the tensioning nut and has a main ring groove, an abutting surface, a liquid-inlet surface, and a liquid inlet. The liquid inlet is formed between an imaginary surface extending from the abutting surface and the liquid-inlet surface. The main sealing ring is mounted and positioned in the main ring groove. The main sealing ring protrudes out of and abuts the main ring groove. The pressure space is formed between a rear side of the main sealing ring and the main ring groove. Therefore, a coolant poured into the sealing device can pressure the main sealing ring to deform the main sealing ring, such that the main sealing ring can tightly abut a tool shank.

Abstract: A modular mechanical seal assembly for use in hygienic and aseptic application having few, if any, cavities in which bacteria and pathogens could grow, includes a longitudinally floating first seal face member, a longitudinally static second seal face member, a biasing device for urging the first seal face member to contact with the second seal face member, a longitudinally static shaft location member, a first sealing member and a second sealing member. The second sealing member is formed as an elastomeric member positioned between the static seal face and the equipment housing and the first sealing member is formed as an elastomeric member and positioned between an item of rotating equipment and the shaft location member, in which the elastomeric members substantially seal off at least one cavity of the seal assembly.

Abstract: Disclosed are various exemplary embodiments of a thrust ring for a track joint assembly. In one exemplary embodiment, the thrust ring may include a generally cylindrical outer surface. The thrust ring may also include a generally cylindrical inner surface including at least one protrusion extending toward a central axis of the thrust ring.

Abstract: The invention relates to a mechanical seal assembly for sealing between a high pressure region and a low pressure region, comprising: a stationary seal ring connected to a stationary component, a rotating seal ring connected to a rotating component, a divided power absorption ring arranged at the rotating component, and a compensation ring unit comprising a first ring, a second ring and a third ring, wherein the first ring and the second ring have a higher strength than the third ring, and wherein the compensation ring unit is arranged in the force path between the high pressure region and the divided power absorption ring.

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 mechanical seal support system includes a pre-pressurized bladder accumulator containing a barrier fluid and a gas under pressure. A cooling circuit includes a mechanical seal for feeding the barrier fluid from the accumulator to the cooling circuit with a pressure regulating device located between the accumulator and the cooling device. A device, responsive to the pressure in the cooling circuit, for indicating when an actual pressure is below a predetermined pressure level is included.

Abstract: A backup ring for a face seal in a roller cone bit is configured to resist wear from drilling fluids present adjacent exposed faces of the backup ring. Portions are removed from an exposed end face in a variety of shapes while the hardness of the material is increased. The removal of material offsets an increase in force that would be transmitted through the backup ring on face seal assembly due to flexing. A spring can optionally be included in the removed material location. Another way is to increase the edge density of all or part of the exposed edges while leaving the interior portions unaffected by using electron beam radiation to increase the crosslink density or by other techniques that allow a unitary structure with a more durable edge region.

Abstract: A backup ring for a face seal in a roller cone bit is configured to resist wear from drilling fluids present adjacent exposed faces of the backup ring. Portions are removed from an exposed end face in a variety of shapes while the hardness of the material is increased. The removal of material offsets an increase in force that would be transmitted through the backup ring on face seal assembly due to flexing. A spring can optionally be included in the removed material location. Another way is to increase the edge density of all or part of the exposed edges while leaving the interior portions unaffected by using electron beam radiation to increase the crosslink density or by other techniques that allow a unitary structure with a more durable edge region.

Abstract: A mechanical seal device is provided for use when fluid pressure is frequently switched between positive and counter pressures. A rotary ring is provided on a rotary shaft and a stationary ring assembly is provided on which the stationary ring side sliding face is formed. A seal cover is provided containing the stationary ring assembly on an inner diameter side and supports the freely moving assembly in an axial direction of the rotary shaft along with a first O-ring to seal the first fluid and a second O-ring to seal the second fluid. A low-pressure chamber is sealed from the first fluid and the second fluid and maintains pressure lower than those of the first and the second fluids.

Abstract: A liftoff carbon seal assembly includes a rotating seal plate adjacent to a rotating seal backer plate and a rotating seal plate retainer. The rotating seal plate defines a rotating seal plate face which extends beyond a rotating seal plate retainer face of the rotating seal plate retainer with a static carbon seal is adjacent to the rotating seal plate.

Abstract: Provided is a mechanical sealing device which is simply configured and wherein a rotation ring can be stably held in a specified axial position, and warping of the sealed surfaces can be prevented, thereby making it possible to obtain appropriate sealing characteristics. In a mechanical sealing device, a rotation ring is axially held between a rotation ring locking surface of a sleeve and a rotation ring locking surface of a collar. Furthermore, the sleeve, the rotation ring fixing collar, and the rotation ring are integrated together by means of a baffle knock pin for the rotation ring. Due to the above, whether positive pressure or negative pressure is applied, the rotation ring does not move, nor do the sealed surfaces of the rotation ring become warped. Moreover, assembly can be simply performed only by means of the knock pin.

Abstract: In accordance with one embodiment of the present disclosure, a method may include installing a first seal around a motor shaft. The method may also include installing a second seal around the motor shaft, wherein the second seal and the first seal may form a hydrodynamic seal when the motor shaft rotates. The method may further include installing a spacer in-between the second seal and the first seal.

Abstract: A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly.

Abstract: An axial face seal assembly including a seal member which is seated in a carrier, the carrier being non-rotatably connected to a base member but movable axially thereto and biased from the base member by means of a compression spring interposed between the base member and the carrier, the base member being axially and non-rotatably securable to a drive shaft by means of an open ring clamp having first end second ends. The ring clamp is supported on the base member, at least one of said first and second ends being movable relative to the other end in a circumferential direction; and wherein tightening means is rotatably journalled on the base member for adjusting the relative distance between the first and second ends of the ring clamp. A mounting fixture is likewise disclosed and cooperating with the seal assembly in a mounting procedure.

Abstract: A slide ring seal arrangement comprises a rotationally fixed slide ring (4) and a slide ring (11), which is provided for rotating together with a rotating component, these slide rings each being held in a loose seat and interacting, in, in essence, radially oriented sealing surfaces, which are prestressed with a main prestressing force while in contact with one another. Each slide ring, on its front face that faces away from the sealing surface, is axially supported on a supporting part (14, 17) via an annular bearing surface (16, 20) provided between the respective supporting part and the adjacent front face of the respective slide ring. A load ratio (d12?dH2)/(d12?d22) of =2.0, preferably between 0.8 and 2.0, preferably no greater than between 1.0 and 1.5, more preferably approximately 1.3 is maintained on the bearing surface (16, 20). The measurement (d1?d2) of each bearing surface (16, 20) is equal to =10 mm, preferably between 0.2 and 2.0, preferably no more than approximately 0.6 mm.

Abstract: A shaft sealing apparatus of including a first mechanical seal having a mating ring disposed at the sealed fluid side and which rotates along with a shaft as the inner circumference side thereof is fixed to the shaft side, and a sealing ring disposed at the air side with respect to the mating ring and is slidable against the mating ring and which does not rotate along with the shaft. An annular space in which the sealed fluid exists is formed at the outer circumferential face side of the first mechanical seal. The shaft sealing apparatus further includes a protection cover disposed adjacent to the sealed fluid side of the seal cover in a state of being sealed with the seal cover and with the first mechanical seal respectively by an O-ring so as to suppress exposure of the seal cover to the sealed fluid.

Abstract: A power transmitting apparatus can comprise a plurality of gear stage clutches arranged on the way of a power transmitting path between an engine and the wheels. Each of the gear stage clutches include alternately arranged driving clutch discs and driven clutch discs, hydraulic pistons actuated by hydraulic oil to selectively engage or disengage the driving clutch discs and driven clutch discs, hydraulic chambers for actuating the hydraulic pistons, and supplying ports communicating with oil passages formed within the input shaft and opening on the side surface of the input shaft for supplying the hydraulic chambers with hydraulic oil from the oil passages to actuate the hydraulic pistons. A plurality of the supplying ports can be formed on a same plane of a radial cross-section of the input shaft.

Abstract: A sealing device for a pump has a sleeve, a rotary collar, a first O-ring, a stationary collar, a mounting bracket, a second O-ring, a mounting collar and a locking pin. The rotary collar, stationary collar, mounting bracket and mounting collar are mounted around the sleeve. The first O-ring is mounted between the sleeve and the rotary collar. The second O-ring is mounted between the mounting bracket and the stationary collar. The locking pin is mounted securely between the mounting bracket and the stationary collar. The O-rings provide multi-sealing functions. The locking pin prevents relative rotation between the mounting bracket and stationary collar.

Abstract: The object of the present invention is to provide a divisional type mechanical seal of outside type which joins the seal face in flat and strongly even in a seal ring having a different thickness in the radial direction, and to exhibit an appropriate sealing ability. In the mechanical seal device of the present invention, the circumference grooves 31 to 34 and 71 to 74 are formed in correspondence with the thicker area 38 and 78 and the thinner area 39 and 79 at the outer peripheral face of the seal ring 30, 70; and the circumference grooves 51 to 54 and 91 to 94 are formed in correspondence with the circumference direction grooves 31 to 34 and 71 to 74 at the inner peripheral face of the holder 50 and 90.

Abstract: A retaining ring for a seal ring of a mechanical seal assembly comprises a recess (8) inserted at the side of one of its axial ends for a sealing receipt and force-fit assembly of the seal ring (2). In the recess (8), an engaging ring (10) made of a flexible material and having a corrugated profile at its inner periphery is retained, wherein at least the elevations (15) of the corrugated profile may be brought in a force-fit engagement with the outer periphery of the seal ring, when the seal ring is moved into the engaging ring by an external mounting force. Each elevation has a leading flange in direction (P) of the mounting movement having a inclination angle ?2 larger than ?1 of a lagging flange (18).

Abstract: A mechanical seal typically includes gaskets as secondary seals therein. An improved gasket is provided which has a U cup design wherein the gasket is formed with a first spring-energized groove which opens radially and has a deflectable sealing wall which is deflectable axially, and includes a second spring-energized groove which is canted at an angle relative to the axial and radial directions wherein the groove defines a sealing leg which is deflectable at an angle relative to the axial and radial directions. A support ring supports the canted sealing leg along the major extent thereof wherein an end portion of the canted sealing leg is disposed for sealing contact with an axially-extending component surface.

Abstract: A seal body for use with a torque tube includes a first portion having an attachment mechanism to releasably secure a torque tube to the first portion, and a second portion configured adjacent to the first portion. The second portion of the seal body includes a substantially uniplanar sealing surface that is orthogonal to an axis of rotation of the torque tube, and that extends across a substantially uniplanar axial end face of the torque tube.

Abstract: A mechanical seal device comprises an attachment component (30) made of resin material having a mounting face (30A) attached with an outer face (60A) of a casing body (60), a fitting face (30C), a ring shape groove face (30B) and a shutoff face (30S) which are formed on an inner circumferential face, and a cooling fluid passage (40) communicating with a cooling chamber (R3) in said ring shape groove face (30B). The mechanical seal device further comprises a first seal ring (3) made of a rustless material having a seal face (3A), a second seal ring (10) made of a rustless material having a counter seal face (10A) slidable in closely contact with the seal face (3A), a seal collar (50) made of resin material holding said second seal ring (10) hermetically, and a seal ring (20) having a third seal face (20B1) which closely contacts with said shutoff face (30S). The seal ring (20) is sandwiched between said supporting circumferential face (50A) and a circumferential section (10B) of the second seal ring (10).

Abstract: A seal assembly for sealing between a first member and a second member of a joint, the first member being able to pivot about an axis of the joint relative to the second member, is disclosed. The seal assembly includes a first ring, a load ring, a first seal ring, and a resilient second seal ring. The first ring is for a first seal cavity of the first member. The load ring is for a second seal cavity of the second member. The first seal ring may be of a metal having a sealing surface extending in a radial direction. The resilient second seal ring may have an annular seal lip. The first seal ring is held stationary by the first ring in the first seal cavity of the first member, and the second seal ring is forced axially by the load ring into axial sealing engagement with the first seal ring. A track joint may include such a seal assembly and a vehicle may include such a seal assembly. The first seal ring may be integral with a thrust ring.

Abstract: A mechanical sealing device and a pump including a mechanical sealing device are described. The sealing device includes a first seal element (11) and a first holder element (12) holding the first seal element. The first seal element (11) forms a first seal surface (13), an opposite backing surface (14) and an outer peripheral surface (15). The first holder element has a support surface (16) and an inner surface (17). A second seal element (21), forming a second seal surface (22), is rotatable in relation to the first seal element around an axis (x) of rotation so that the first seal surface (13) abuts sealingly the second seal surface (22) in a radial plane. An elastomer element (30) is provided between the outer peripheral surface (15) and the inner surface. The opposite backing surface abuts tightly the support surface.

Abstract: An improved mechanical shaft seal to give a tight seal between relatively rotating machine parts and prevent the escape of particulate material into the atmosphere or into the mechanical components of the housing under adverse operating conditions. The seal provides a grease chamber that prevents solid particles from reaching the main seal by migration within the mechanical shaft seal.

Abstract: A mechanical seal assembly to be used in sterile applications comprises a pair of co-operating seal rings (2, 5), one of which is held rotationally fixed and the other of which is provided to rotate together with a rotating component, wherein one of the seal rings is axially movable and biased by a spring against the other seal ring, a retainer housing (1) at which the rotating seal ring is retained near an axial end thereof, a mounting member (12) which may be mounted rotationally fixed at the rotating member, and a rotatory force transmission device (10) for transmitting a rotatory force between the mounting member and the retainer housing. The rotatory force transmission device (10) comprises a transmitting ring (15) retained in press-fit at the retainer housing (1) near the other axial end thereof, the transmitting ring including at least one protruding engagement member (20) engaging in an aligned recess in the mounting member.

Abstract: A seal and seal assembly for providing a seal between an outer shaft and an inner shaft. The assembly includes a seal subassembly disposed between the shafts. The subassembly includes a split carbon ring, a solid outer ring, and a spring mechanism provided between the split carbon ring and the solid outer ring. The carbon ring is radially split into a plurality of segments having splits between ends of adjacent segments. The segments include a circumferential inner radius and a sealing dam on the circumferential inner radius. The solid outer ring includes a sealing face and a plurality of hydrodynamic grooves provided on a radial face. The spring mechanism may be configured to engage a portion of an outer diameter of the split carbon ring and a portion of an inner diameter of the solid outer ring and to urge the split carbon ring radially towards the inner shaft.

Abstract: A mechanical seal typically includes gaskets as secondary seals therein. An improved gasket is provided which has a U cup design wherein the gasket is formed with a first spring-energized groove which opens radially and has a deflectable sealing wall which is deflectable axially, and includes a second spring-energized groove which is canted at an angle relative to the axial and radial directions wherein the groove defines a sealing leg which is deflectable at an angle relative to the axial and radial directions. A support ring supports the canted sealing leg along the major extent thereof wherein an end portion of the canted sealing leg is disposed for sealing contact with an axially-extending component surface.

Abstract: A liftoff carbon seal assembly includes a rotating seal plate adjacent to a rotating seal backer plate and a rotating seal plate retainer. The rotating seal plate defines a rotating seal plate face which extends beyond a rotating seal plate retainer face of the rotating seal plate retainer with a static carbon seal is adjacent to the rotating seal plate.