Abstract: A swivel joint for supplying and discharging various types of fluid between the top and bottom of a rotating platform includes an outer cylinder, an intermediate cylinder, and an inner cylinder that are arranged concentrically around a central axis. The intermediate cylinder can freely rotate with respect to the outer cylinder and the inner cylinder, and a hydraulic fluid flow channel is provided between the outer cylinder and the intermediate cylinder. A hot water flow channel between the lower portion of the inner cylinder and the intermediate cylinder includes an inner annular groove formed on the inner circumferential face of the intermediate cylinder. An air flow channel between the upper portion of the inner cylinder and the intermediate cylinder includes outer annular grooves formed on the outer surface of the inner cylinder.

Abstract: The invention relates to a hydraulic connector, particularly for a motor vehicle windscreen wiper system. The connector is designed to be mounted on a wiper blade fitted with a perforated pipe carrying cleaning and de-icing fluid, and comprises at least one inlet coupling suitable for connection to a fluid feed, and at least one distributor provided with at least one outlet coupling designed to be connected to the perforated pipe. The connector also includes at least one internal path for carrying the fluid from the inlet coupling to the distributor. Thus, by means of the presence of the internal path through the connector, the inlet coupling can be positioned at various locations on the connector, without feeding directly into the distributor.

Abstract: Such a mobile recycler that an operator can replenish a reducing agent tank with a reducing agent from the ground is provided. A reducing agent tank stores a reducing agent supplied to an exhaust gas treatment device treating an exhaust gas from an engine through reduction reaction. A tank case accommodates the reducing agent tank. The tank case has a support base supporting a container of the reducing agent for replenishment to the reducing agent tank.

Abstract: A coupling device for transferring a medium from a stationary part to a rotating part, including a stationary first ring, which is fixed in place on a stationary part, a second, rotatable ring, which is fixed in place on a rotatable part and rotates along with the rotatable part, a bearing, which is situated between the first ring and the second ring, an annular gap, which is situated between the first ring and the second ring, a supply line, which is disposed at the first ring for the supply of the medium, a discharge line, which is situated at the second ring for the conveying of the medium, the discharge line rotating along with the second ring, an inner sealing element, which seals the annular gap at a radially inner side, and an outer sealing element, which seals the annular gap at a radially outer side.

Abstract: A pressure regulation system for a high pressure swivel comprises an annular inner wall and an annular outer wall, mutually rotatable around an axis, defining a toroidal chamber, and a gap extending axially between the walls from the chamber to an outer part. Positioned in the gap are an isolation seal, an isolation gap section, a primary seal, a primary gap section and a secondary seal. A first pressure control unit is connected to the chamber and to a pressurization device coupled to the isolation gap section for supplying fluid to the isolation gap section from the pressurization device.

Abstract: A rotating table provided with a determined gap Db and serving as a rotating body is rotatably mounted on a fixed base. Seal-member accommodating spaces serving as annular grooves are partitioned and formed in a fixed surface. Annular seal members are disposed in the seal-member accommodating spaces. When a vacuum is supplied to a communication passage, the absorbed seal members contact with the fixed surface and a rotated surface to seal gaps therebetween. When a positive pressure is supplied to the communication passage, the seal members are relocated in the seal-member accommodating spaces. The seal-member accommodating space has a taper portion, thereby preventing the seal members from biting. While the rotating table is being rotatably driven, no vacuum is supplied to the communication passage.

Abstract: The invention relates to a tubular rotary joint, in particular for conducting a polymer melt, comprising a holder and a mobile connection body, which is rotatably connected to the holder by means of one bearing end. A distribution chamber with a feeder is configured in the holder, said chamber being connected to a distribution channel that is configured in the connection body. The distribution channel in the connection body leads to a connection end, to which a pipe section can be coupled. To guarantee the flexibility of the connection body at high pressure and at high temperatures, the bearing end of the connection body is configured as a shaft journal, which is rotatably mounted in a bearing bore that penetrates the distribution chamber in the holder.

Abstract: A rotating passage feed system for admitting pressure means into two machine parts (hub part (2), shaft (3)) which rotate relative to one another about a common axis. Conduits (17) that convey the pressure means are located in the shaft (3) and are joined to pressure means connections (6) via tapped holes while a connecting part (5) in which ring channels (8) are provided is also joined thereto. A central sleeve (9) is joined to the connecting part (5) in a non-rotatable manner. The connecting part (5) and the central sleeve (9) are produced in an inexpensive manner as lightweight structure formed from sheet metal through a shaping process.

Abstract: A rotary coupling has a nonrotatable stator having a stator passage with an end opening along an axis and a rotor rotatable on the stator about the axis and having a rotor passage with an end axially confronting the stator end. A rotor seal is rotatable with the rotor end about the axis, and a stator seal is rotationally fixed to the stator end and bears axially on the rotor seal. Thus the rotor seal rotates on the stator seal on rotation of the rotor. A strain element that changes size in response to temperature in the stator adjacent the seals is coupled to one of the seals for shifting the one seal relative to the other seal in response to temperature changes adjacent the seals.

Abstract: A swivel joint system for a cryogenic liquid transfer line, such as a liquefied natural gas line, and for return of cold gas associated with the cryogenic liquid transfer. The system includes a swivel joint for the passage of the cryogenic liquid and a swivel joint for the return of the cold gas. Each swivel joint includes a conduit with a fixed conduit portion and a rotating conduit portion, rotating relative to the fixed conduit portion, and a rotational guide interposed between the fixed and rotating conduit portions. The swivel joint device for the passage of the gas return is integrated in the swivel joint device for the passage of the cryogenic liquid.

Abstract: A device which allows fluid to enter and/or exit the device axially or radially thru multiple ports, on and/or offset from the axis of rotation. One end of the assembly can be rotated axially with respect to the other while keeping fluids isolated from each other. Compared to existing multi-path fluid swivel joint designs, this approach is simple in construction, compact in size, and exhibits a relatively low pressure drop.

Abstract: A bearing has a mount relative to which can move a part to which hydraulic fluid must be supplied. A connector has a housing fixed to the bearing mount and formed with a central bore centered on an axis and with a radial bore extending outward from the central bore. A tube axially shiftable in the central bore forms at the radial bore an annular compartment and has a passage opening radially into the compartment and axially at one end of the tube. A conduit is connected a coupling at one end of the tube and the part. Another coupling at an outer end of the radial bore connects to a source of hydraulic fluid under pressure so that the fluid can flow through the radial bore, annular compartment, and passage to the coupling at the one end of the tube and then through the conduit to the movable bearing part.

Abstract: A fluid rotary union (FRU) includes a first member and a second member. The first member includes a plurality of spaced longitudinally directed bores of different lengths, each of which terminate at an associated radially directed bore communicating the longitudinally directed bores with an outer surface of the first member. The second member includes a first housing, a plurality of longitudinally adjacent segments and a plurality of couplers positioned between adjacent ones of the segments and the first housing and an adjacent one of the segments. Each of the segments has at least one circumferential groove formed into an inner surface for providing fluid communication with one of the associated radially directed bores of the first member. A radially directed bore extends from each of the grooves in the segment to the outer surface of the segment.

Abstract: A dual flow rotating union with a longitudinal axis, including a conduit having opposing ports oriented parallel to the longitudinal axis, the conduit having a rotating section and a stationary section. One conduit port is located on the rotating section, the other conduit port is located on the stationary section. A housing is disposed about the conduit, the housing also having opposing ports oriented parallel to the longitudinal axis. The housing includes a stator portion and a rotor portion rotatably disposed with respect to the stator portion. One housing port is located on the stator portion and the other housing port is located on the rotor portion.

Abstract: A rotary transmission leadthrough for fluid systems is proposed, by means of which the mobility of a fluid system is increased and new fields of application can therefore be opened up. This is achieved according to the invention in that, in addition to a first rotor rotatable about a first rotation axis, a second rotor rotatable about a second rotation axis different from the first rotation axis of the first rotor is provided.

Abstract: The invention discloses a swivel comprising two coaxial, mutually rotatable members is provided with means for transferring operating and/or controlling media or the like between the members. The means can be flexible hoses or cables connected between the members. The hoses or cables are connected to the members by means of quick-couplings.

Abstract: A high pressure swivel includes an inner and an outer wall. Each annular wall is connected to a respective distribution member via apertures which have an axial dimension which is smaller than the diameter of the inlet or outlet. In this way, the pressure area between the seals of the inner and outer rotatable walls is reduced. Each distribution member may include a chamber that is defined by the external surface of the inner and outer annular walls, and an enclosing wall. In this way, an effective thermal isolation is provided by the distribution chambers adjacent to the external surfaces of the inner and outer rings. Deformation of the distribution chambers of the swivel will tend to decrease the width of the seal extrusion gap.

Abstract: A dual flow rotating union with a longitudinal axis, including a conduit having opposing ports oriented parallel to the longitudinal axis, the conduit having a rotating section and a stationary section. One conduit port is located on the rotating section, the other conduit port is located on the stationary section. A housing is disposed about the conduit, the housing also having opposing ports oriented parallel to the longitudinal axis. The housing includes a stator portion and a rotor portion rotatably disposed with respect to the stator portion. One housing port is located on the stator portion and the other housing port is located on the rotor portion.

Abstract: Rotary joints are provided, for use in allowing fluid flow from a stationary member to a rotating joined member.

Abstract: A swivel (40) includes an outer (41) and inner annular wall (42). A toroidal chamber (44) is defined between the outer and inner walls and opposing peripheral faces of the walls define an upper (45) and lower gap (52) extending respectively upwardly and downwardly from the toroidal chamber. The upper and/or lower gap has a first section (46) extending axially, a second section (47) transverse to the first section (46) and a third section (48) extending substantially parallel to the first section (46). A seal (50, 51) is placed in the second (47) or the third (48) section of the upper and/or lower gap (25, 52), the seal having two flexible legs (61, 62) arranged in a generally u-shaped or v-shaped orientation. The gap near the area of the seal is filled with a sealing fluid during use.

Abstract: A multi-channel rotary joint comprising-elastic seal rings each having an annular groove that are used to form a low-pressure channel space and a high-pressure channel space between the opposing peripheral surfaces of a joint housing and a rotator that rotates inside the joint housing. Seal rings that seal the low-pressure channel space which forms part of a vacuum suction route are engaged with and supported by one of the opposing peripheral surfaces such that annular grooves are disposed symmetrically and opening into spaces adjacent to the low-pressure channel space. The seal rings that seal the high-pressure channel space which forms part of a pressurized fluid supply route are engaged with and supported by one of the opposing peripheral surfaces such that the annular grooves are disposed symmetrically and opening into this high-pressure channel space.

Abstract: A fluid delivery system supplies two or more fluids to a rotatable shaft integrated within a device such as a mechanical press and develops damped clearance spaces at the bearing surfaces of the fluid coupling device. In one arrangement, a rotary union is adapted for driving rotation by the shaft and provides two fluid pathways disposed in flow communication with a fluid access channel formed in the shaft. Bearing support is provided by an oil film present within a clearance space defined between the rotary union and a stationary housing disposed thereabout. In another arrangement, a stationary fluid transfer device is adapted for non-rotation and disposed within a crankshaft cavity to define a clearance space there between. A fluid pathway formed therein communicates fluid to the crankshaft access channel. Bearing support is provided by an oil film present in the clearance space. There are no sliding face seals in the arrangements.

Abstract: A production swivel with passive control of dynamic seal gap width using internal swivel pressure. The swivel includes inner and outer housings with a middle housing which transfers, component deformation due to fluid pressure from the dynamic sealing interface to the static sealing interface. The outer housing and inner housing rotate together, but the outer housing is free to expand radially outward from the middle housing with increasing fluid pressure. A floating riser spool is pressure balanced at the connection to the inner housing and to a fixed swivel stack base. Swivels are stacked with a swivel connector/spool and upper and lower mounting rings cooperatively dimensioned so that access to seals can be obtained while the swivels remained stacked without the use of overhead cranes or other lifting points than the swivel being serviced.

Abstract: The invention provides an improved rotating seal apparatus including a plurality of concentrically spaced annular rotating seals. The invention also provides a rotating seal apparatus including a pressurized annular chamber surrounding an annular rotating seal.

Abstract: A rotating connector for the transfer of at least one pressurized process fluid, and comprising a central stem (2) on which there is placed a number of ring elements (3, 4) comprising at least one annulus element (3) for fluid transfer between an associated course (8) in the stem (2) and an outlet (9) from the connector, and a bearing ring element (4) arranged on each side of the annulus element (3) and sealed there-against by dynamic seals (14) operated by means of a barrier liquid having a higher pressure than the process fluid pressure, and a looking nut (21) to keep the ring elements (3, 4) preloaded against a shoulder (20) on the stem (2).

Abstract: A piping structure of a working machine, which prevents the piping at a coupling portion where a pair of members are swingably coupled together via a shaft, from being damaged. The piping structure comprises a swivel joint which is a rotary joint for fluid and is disposed, on the outer side in the radial direction of a shaft of a coupling portion where a pair of members are swingably coupled together via said shaft, so as to swing on axis of swinging motion as a center of rotation.

Abstract: A rotating union for transferring a material stream, and especially a bearing damaging material stream, includes, a generally cylindrical body and an annular sleeve that is annularly spaced from the body and rotatably coupled thereto via a pair of axially-spaced bearings. The body and the sleeve are formed with ports and interconnecting passages for carrying the material stream and these ports and passages communicate with each other via a material transfer interface that is sealed by at least one dynamic seal assembly. Finely lapped material is used to improve the quality of the dynamic seal faces, and the seal faces are uniformly spring loaded. This, along with the axial spacing of the bearings, helps to minimize seal face misalignment and consequent leakage. In the event that material leakage does occur, the rotating union further includes a leakage collection area filled with a barrier fluid. The leakage collection area may encompass the bearings or it may be separate therefrom.

Abstract: A two-way rotary joint for fluids is disclosed. An illustrative example of the rotary joint includes a main body provided with two inlet ports, and a rotor rotatably coupled to the main body. The rotor has two passages each in communication with a respective one of the inlet ports in the main body. A ring-shaped hub is rotatably supported relative to the rotor and has a radial outlet port in communication with one of the passages in the rotor.

Abstract: A high pressure swivel includes an inner and an outer annular wall. Each annular wall is connected to a respective distribution member via apertures which have an axial dimension which is smaller than the diameter of the inlet or outlet. In this way, the pressure area between the seals of the inner and outer rotatable walls is reduced. Each distribution member may include a chamber that is defined by the external surface of the inner and outer annular walls, and an enclosing wall. In this way, an effective thermal isolation is provided by the distribution chambers adjacent to the external surfaces of the inner and outer rings. Deformation of the distribution chambers of the swivel will tend to decrease the width of the seal extrusion gap.

Abstract: Two axially spaced seal rings are located within annular grooves of a retainer to provide a seal for use between a cylindrical shaft and a housing bore. The resulting seal pack can be positioned at a lubricant passage such that lubricant may pass between the housing and the shaft but not longitudinally along the shaft. The annular retainer is dimensioned for an interference fit with either the housing bore or the shaft, and includes at least one opening located between the annular grooves such that lubricant may pass therethrough. An intermediate portion of the annular retainer provides a lubricant channel such that lubricant can flow circumferentially, avoiding the need to orient the opening in the annular retainer.