Abstract: A rotodynamic pump for pumping a fluid includes an impeller, a housing surrounding the impeller, and a pressure regulating mechanism. The pressure regulating mechanism is configured to adjust the clearance between the impeller and the impeller housing to regulate pressure of the fluid downstream of the impeller. A method of regulating the delivery pressure is also disclosed.

Abstract: A seal assembly that includes a rotatable seal component, a non-rotatable seal component, and a plurality of pairs of flexures. The non-rotatable seal component is disposed facing the rotatable seal component. The plurality of pairs of flexures is spaced apart from each other along a circumferential direction of the seal assembly. Each pair of the plurality of pairs of flexures has a center line and includes a first flexure and a second flexure disposed in a stressed condition such that a portion of the first flexure and a portion of the second flexure are in contact with each other. Further, the first end of the first flexure is inclined at a first angle relative to the center line and a first end of the second flexure is inclined at a second angle relative to the center line. Also, first end of the first flexure and a first end of the second flexure are coupled to each other and to the non-rotatable seal component.

Abstract: The invention relates to a mechanical seal arrangement, comprising a rotating slide ring and a stationary slide ring which define a sealing gap therebetween, and a bellows unit with a bellows element and an intermediate disk, wherein the bellows element has a first connection region, a second connection region and a bellows intermediate region, wherein the bellows element is produced from an elastomer material and provides a connection between the rotating slide ring and a rotating component, wherein the intermediate disk is arranged between the bellows element and the rotating slide ring, and wherein an inner peripheral region of the intermediate disk is arranged for support on the rotating component.

Abstract: Propeller blade assemblies and a propeller blade retention assembly including a sleeve for operably coupling a propeller blade to a hub wherein the sleeve retains the propeller blade within the hub and allows the propeller blade to rotate about its pitch axis and where the sleeve includes a self-aligning mechanism.

Abstract: A mechanical seal includes an elastomeric member, a spring biasing device, a longitudinally floating first member having a seal face, a longitudinally non-floating second member and a longitudinally floating third member. The elastomeric member is in sealing engagement with the first member, second member and third member and the spring biasing device is longitudinally positioned between the first member and the second member. One of either the first member or the second member is provided with at least one protruding male portion and the other member of either the first member or the second member is provided with corresponding female portion into which the male portion locates.

Abstract: A synthetic eye model includes an enclosed lens capsule, a removable cortex material within the lens capsule, and an outer support for the lens capsule. A synthetic eye model assembly includes an eye segment comprising a lens capsule and an outer support and a base for detachably engaging the eye segment. The synthetic eye model and assembly can be made by 3D printing. A method of practicing eye surgery and a method of making a three-dimensional synthetic tissue model of an anatomical tissue structure are also disclosed.

Abstract: An accordion-structured welded bellows for a semiconductor-manufacturing device is characterized in that a plurality of annular bellows plates having curved surfaces in a radial direction are connected in an alternating fashion on the outside-diameter side and the inside-diameter side, wherein the annular bellows plates have a processing-side bellows plate and a non-processing-side bellows plate, a gas layer is interposed between the two bellows plates, the processing-side bellows plate is configured as a thick plate, and the non-processing-side bellows plate is configured as a thin plate. The welded bellows is less likely to be damaged by foreign matter and to be able to use the non-processing-side bellows plate to compensate for any damage to the processing-side bellows plate.

Abstract: An earth bit includes a cutting cone carried by a lug, and an interstice seal assembly which forms a dynamic seal with a radial interstice lug surface of the lug. The interstice seal assembly includes a rigid sealing ring having lengthened and shortened arm portions. The lengthened arm portion extends outwardly from the shortened arm portion, and engages the radial interstice lug 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.

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: A mechanical seal having a seal cover capable of being installed on the outer surface around the circumferential surface of a hole of a seal housing and having an inner circumferential surface surrounding a shaft; a bellows having a first installation portion and a second installation portion, the first installation portion being formed by sealingly fitting the inner circumferential surface of the seal cover to one end circumferential surface of the bellows, the seconds installation portion being at the other end circumferential surface of the bellows, the first installation portion and the second installation portion forming a tubular portion between the portions, the tubular portion being formed as an elastic means surrounding the shaft; a stationary sealing ring sealingly installed on the circumferential surface of the second installation/portion and having an annular sealing surface pressed by the elastic means of the bellows; a rotating sealing ring having an annular relative sealing surface facing the s

Abstract: An axial face seal arrangement, which is arranged for joint rotation with a drive shaft in a rotary machine, includes a base element and a moving part, wherein the base element is connectable to a drive shaft for joint movement therewith, the moving part presenting a sealing end face and being axially movable in relation to the base element and biased from the base element by a spring, wherein the moving part and the base element include at least one torque driver pin and at least one corresponding aperture into which the torque driver pin is displacably inserted for joint rotational movement of the moving part with the base element. At least one wear protection pin is arranged between the torque driver pin and the aperture at a force transmitting interface of the torque driver pin and the aperture.

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: A seal chain in which a sealing member having a shape of a “plus” in section is steadily twisted (turned) and deformed into a shape of an “X” and whose abrasion resistance and flexing torque are improved. The sealing member is formed such that inner diametric side end faces of third and fourth lip portions extending in a transverse direction from a center base portion extend in a direction orthogonal to a radial direction and outer diametric side end faces thereof are formed as tapered faces such that width of the lip portion is widened from an edge face toward the base portion. A diagonal distance of the center base portion is within a range of 0.8 to 1.0 of a clearance between inner and outer link plates.

Abstract: A seal and method of making seals utilises folds in order to form creases in a length of material such that the creases reinforce individual seal elements or surfaces whilst perforations or slots in a seal edge allow air leakage from one side of the seal element or surface to the other. Thus, air pressurisation can take place between spaced seal elements or surfaces and this allows air flotation or riding of a rotating component relative to a static housing component. The perforations are typically graduated from the seal edge in order to provide the best pressurisation and air-riding effect for proximity or gap control between the sealing edge and the rotating component surface. The slots effectively provide flexibility to the sealing edge such that the seal component emulates a brush seal.

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: An adapter for sealing an outer joint portion of a joint assembly is provided. The adapter includes a main body having an aperture for receiving an outer joint portion, the aperture including an inner sealing surface. The inner sealing surface has a plurality of track portions and a plurality and root portions, where each root portion includes a root midpoint and two track connecting points. The track connecting points connect the root portion to the track portion. The root portion includes a first root radius and an offset root radius, where the first root radius is measured from a first center, and the offset root radius is measured from an offset center. The offset center is located closer to the center axis of the adapter than the first center. Each root portion includes the first root radius at the track connecting point, and gradually transitions to the offset root radius.

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: A seal assembly includes a ring component for coupling a seat component to a shaft. The ring component includes a first portion having an annular shape and configured to have a sealed engagement with the shaft. The ring component also includes a second portion having a flange extending radially outwardly therefrom. The ring component is configured to receive the seat component between the flange and the first portion and thus form a seal seat assembly. The flange is configured to mechanically lock the seat component relative to the ring component when the seal seat assembly is disposed on the shaft.

Abstract: A constant velocity joint assembly includes an outer joint member and an inner joint member. A first shaft is coupled to the inner joint member for articulated movement with the inner joint member relative to the outer joint member. A boot is coupled to the first shaft and the outer joint member to seal the constant velocity joint assembly. An insert is secured to and supported within the boot adjacent to and in abutting engagement with an axial end of the outer joint member. The insert limits movement of the first shaft to within a pre-determined range of articulation to prevent disengagement and/or disassembly of the inner joint member relative to the outer joint member.

Abstract: A column hole cover is interposed between a circumferential portion of an aperture of a column hole of an instrument panel and a steering gear box capable of being displaced in a predetermined direction. The column hole cover includes a cylindrical main body extended in the predetermined direction. The main body includes a first annular end portion directly or indirectly fixed to the steering gear box, and a second annular end portion. The second end portion is provided with an annular seal. An intermediate portion between the first and second end portions is provided with a expandable/contractible portion capable of being elastically expanded or contracted in the predetermined direction. Irrespective of the displacement of the steering gear box, the annular seal is maintained in an elastic pressure contact against the circumferential portion of the aperture of the instrument panel by a reaction force of the compressed expandable/contractible portion.

Abstract: The present invention solves the aforementioned problems by providing a vacuum seal assembly for a high power generator stub shaft which includes a seal stator encircling the stub shaft and a plurality of oil seals disposed on an inner diameter of the seal stator and encircling the stub shaft. Adjacent oil seals form a plurality of seal cavities between the stub shaft and the seal stator, and define gaps between each oil seal and the stub shaft for receiving a lubricant film. At least one seal feed conduit extending through the seal stator into the plurality of seal cavities to provide lubricant to the seal assembly.

Abstract: An air supply device includes a plurality of bearings for rotatably supporting a shaft, a plurality of bearings for rotatably supporting an orbital scroll, and a plurality of bearings for rotatably supporting each of a plurality of rotation constraint members that prevents rotation of the orbital scroll about its own axis, but allows the orbital scroll to orbit relative to a stationary scroll. A grease-filled bearing is used as each of the bearings. Each of the bearings for supporting the orbital scroll includes two sealing materials disposed on respective sides of a plurality of rolling elements, and each of the sealing materials has an inner end held in contact with an inner ring and an outer end held in contact with an outer ring.

Abstract: A flanged boot having a rolling bearing interface suitable for connection to two mechanical components which are movable with respect to each other, in terms of both rotational and axial movements. The flanged boot has a first annular flange at one end and a second annular at the other end. A rolling bearing, such as for example a roller (needle) or ball bearing, is press-fit onto a suitably configured structure of a first mechanical component. One of the first and second annular flanges is interfaced sealingly with respect to the rolling bearing. The other of the first and second annular flanges is sealingly connected to a second mechanical component. Either of the first or second mechanical components may be considered to be moving relative to the other.

Abstract: A primary technical goal of the present invention is to improve the durability and the seal performance of a cup gasket for a mechanical seal device which retains a seal ring. The mechanical seal device disposes a cup gasket made of a resilient rubber material between the mounting surface of the first seal ring and the step shoulder installation surface in which the cup gasket retains a support plate in an integral manner and the support face of the support plate facing opposite relative to and in approximately parallel with the mounting surface of the seal ring.

Abstract: A bearing arrangement supporting a sealing bellows around a shaft to permit axial and angular motion includes inner and outer bearing sleeves, and a rolling bearing having an inner race ring fitted around the inner sleeve with one end face engaging a shoulder in the inner sleeve. A sealing device is provided in a space between the inner and outer sleeves. A flexible elongated bellows for enclosing a portion of the shaft is sealingly connected at one end to the outer surface of the outer sleeve and is attachable at its opposite end to a fitting of a machine member from which the shaft projects. The outer sleeve is a sheet metal sleeve provided with an inwardly bent flange portion forming an engagement surface for the opposite side face of the rolling bearing. The bellows is fixedly attachable to the outer surface of the outer sleeve by bonding through vulcanization.

Abstract: A primary technical goal of the present invention is to provide a mechanical seal device in which a manufacturing cost of the parts is decreased, a satisfactory seal performance is exhibited even under severe operating conditions, and the device can be easily mounted outside relative to the housing.

Abstract: A sealing cap on ball-and-socket joint made of elastomer with openings on both ends, a first one of larger diameter to be coupled to the top of the ball-and-socket joint case and a second one of smaller diameter to be coupled to the body of the spherical end pin. The conventional sealing ring is eliminated by making a channel on the top of the ball-and-socket joint case that has a deformable external flap or flaps to fix this opening of larger diameter of the sealing cap inside the channel provided on the top of the ball-and-socket joint case. The sealing system provides an improved sealing to the system and fastening the sealing cap to the inside of the channel, which, consequently, makes difficult the entry of any impurity inside the ball-and-socket joint and does not allow the sealing cap from getting loose from its mounting position.

Abstract: A ball and socket joint assembly having a cylindrical sealing cap (1) housing (6, 6A) connected to the external case (4) of the joint assembly. The housing (6, 6A) may be comprised of plastic, aluminum, rubber, or other malleable material. The housing (6, 6A) has a ring shape, with a groove molded into the housing's external surface for receiving the larger diameter end of a sealing cap (1), the smaller diameter end of the sealing cap (1) is directly attached to the shaft of the ball and socket joint's spherical pin (2). The preferred embodiment of the housing (6) has a general “L” shape, and an alternative embodiment (6A) has a more linear shape. The sealing cap (1) ensures that the ball and socket are not contaminated during operation of the joint assembly. The ball and socket joint of the invention is primarily designed for motor vehicle applications, specifically, in automotive steering and suspension systems.

Abstract: A wire cut electric discharge machine that includes a machining tank storing a machining fluid, an upper arm disposed at an upper portion of the machining tank, a lower arm inserted into the machining tank, a wire electrode extending between the upper arm and the lower arm for performing electric discharge machining on a workpiece placed fixedly in the machining tank, a support member mounted to the machining tank for supporting the lower arm such that the lower arm is slidable relative to the machining tank and sealed from the machining tank, and an O-ring interposed between the lower arm and the support member. The support member has a groove formed all around its inner circumference, and the O-ring makes contact with sidewalls of the groove. Accordingly, even when the outside diameter of the O-ring varies depending on an error in diameter of the lower arm, contact between the sidewalls and the O-ring remains unchanged and fluid-tightness can be reliably ensured.

Abstract: A sealing element for a face seal assembly including a bellows portion having mounting portions at its axial ends. One of the mounting portions is designed for non-rotational mounting on a component, e.g. a shaft, and the other for retaining an annular face member. The sealing element is formed, on at least the faces thereof exposed to a medium to be sealed, from a plastics material selected from a group of plastics materials comprising PEEK and ECTFE. The sealing element serves for applying a bias force to the annular face member. The sealing element enables the design of an uncomplicated, easily maintained, externally pressurised single action face seal assembly which is particularly suitable for sealing aggressive media.

Abstract: A seal device for creating a seal between a rotatable shaft and a stationary member. The seal device includes a seal member having a generally annular body including a generally cylindrical inner wall forming a bore that extends through the body and a sealing surface adapted to rotatably and sealingly engage the stationary member. The body includes a generally annular flexible finger seal member having a base attached to the body and a generally circular peripheral tip that defines an aperture. The bore of the seal member and the aperture of the finger seal member are adapted to receive the shaft such that the tip of the finger seal member is in static sealing engagement with the shaft. A coupling member is adapted to attach the seal member to the shaft for conjoint rotation therewith and to resiliently bias the sealing surface of the seal member into rotating sealing engagement with the stationary member.

Abstract: A mechanical face seal device includes a bellows assembly comprising a bellows member of resilient material having axially spaced mounting portions interconnected by an intermediate foldable portion, one of said mounting portions being adapted to be fixed relative to a rotary component whilst the other is in torque transferring relationship with a rotary annular seal member, and a biasing means for diasing the rotary annular seal member against the stationary annular seal member. An essentially stiff support member having a predetermined radial dimension is provided for axially supporting the rotary annular seal member and is itself supported by the bellows member.

Abstract: A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includes a rigid mounting member, to which the diaphragm is mounted and which is held and spun by a chuck. Preferably, this rigid mounting member includes a boundary wall which together with the elastic diaphragm defines the chamber. The boundary wall may be a substantially imperforate circular wall which extends to the periphery of the processing chamber but defining one opening, preferably near the axis of rotation, permitting a conduit or conduits to pass therethrough so as to be in fluid communication with the processing chamber. The rotor may include a separate structure for controlling the flow of liquid out of the chamber into the conduit.