Abstract: An bushing for securing machine elements. the two-piece bushing includes a body member having a central bore for receiving a shaft or the like and a flange which is rotatable with respect to the bore. The flange includes a plurality of bores for receiving securing means for securing the bushing to a hub or the like and a ridge portion for engaging at least a portion of the body member such that, when the securing means are tightened, the bushing and hub are drawn together. In the preferred embodiment, the outer surface of the end of the body member and the inner surface of the flange have complementary grooves therein for receiving a plurality of steel balls. When the balls are inserted within the groove, a ridge is formed which locks the flange and body member together in the axial direction. In addition, the bushing may include a ridge portion between the body member and the flange for preventing axial movement in at least one direction.

Abstract: An arrangement for axially displacing rolls in rolling mill stands. The rolls of the rolling mill stands are supported in roll supports or chocks which are adjustably and slidably guided in the roll housings of the stand. The rolls are displaceable by means of hydraulic piston-cylinder units which are supported relative to the roll housing and are connected to the supports of the bearings of the roll. The bearings of the rolls are axially slidable within the roll supports and a sliding guide is arranged on the roll support for a sliding carriage which supports a coupling device for a roll neck. The hydraulic piston-cylinder units are articulated to the sliding carriage. The coupling device includes drive members which are slidable in radial guides and can be placed in an annular groove of the roll neck. The coupling device is supported by the neck bushing of the deep-groove-type radial roller bearing which is immovably arranged in the sliding carriage.

Abstract: A swivelable quick connect assembly for use with tubular conduits includes a housing having an axial bore for receiving one end of the conduit, and a first retainer detachably secured to the housing and is cooperable with an annular projection on the conduit for securing the conduit in its operative position within the bore. A second retainer means demountably coupled to the housing for maintaining the connection between the conduit and the housing.

Abstract: A device forming a swivel joint for a cryogenic liquid with at least one central duct for the flow of said cryogenic liquid through the joint and comprising at least one annular duct co-axially surrounding said central duct for the return of the cold gas originating from the vaporization of the moving liquid, said annular duct comprising gas inlet and outlet pipes; a stationary portion and a portion mounted in rotating relation to said stationary portion by means of a ball or roller bearing operating at a temperature close to ambient temperature, a double set of sealing gaskets also operating at a temperature close to ambient temperature; and heat insulation of at least the parts of said stationary and movable portions forming said annular duct and contacted by said cold gas, so arranged as to prevent any cooling-down of said sealing gaskets through convection or radiation; the device being applicable in particular to the off-shore transfer of liquefied natural gas.

Abstract: A rotary and sealed connection for pressurized fluids is provided, including a first part that is secured, for example, to a fixed source of pressurized fluid and has a recess for communication therewith and through a second part, with a fluid-using rotary apparatus of revolution rotating about a shaft and extending through the first part through a passage, said second part having a degree of radial freedom and being held in position without play by a seal serving as a bearing. The annular space in the passage may thus be extremely reduced, thus avoiding any risk of extrusion of the seal.

Abstract: An adjustable and detachable fitting assembly for reinforced hose having an inner fluid sealing tube and an outer reinforcement. The assembly has a nipple insertible into the tube and a sleeve surrounding the nipple but spaced therefrom so that a cutting edge on the sleeve separates the tube structure allowing one separated portion of the tube to fill the space between the sleeve and nipple with the outer separated portion of the tube and the reinforcement filling a space between the outer surface of the sleeve and a socket threaded thereto. The sleeve rotates about the nipple and is longitudinally adjustable with respect thereto while maintaining connection of the sleeve to the nipple. This allows for compensation for misalignment.

Abstract: A rotating union including a seal assembly having a rotating seal member removably mounted in the rotor, a non-rotating floating seal member mounted in the housing of the union and keyed thereto to prevent rotation within the housing, and a bias assembly maintaining seal surfaces of the two seal members in engagement. In one embodiment, the combination of materials for the seal members provides a silicon carbide to carbon graphite seal.

Abstract: A swivel construction and method of making the same are provided, the construction comprising a body member and an adaptor member, each member having opposed ends and having a passage passing through the ends thereof, one end of the body member and one end of the adaptor member being disposed in telescoped relation, the construction having a retainer disposed between the telescoped ends and tending to hold the members in the telescoped relation while permitting swivel movement therebetween, the construction having a seal disposed between the telescoped ends and tending to seal the telescoped ends together while permitting swivel movement therebetween, the construction having a bearing disposed between the telescoped ends and intermediate the retainer and the seal, the construction having structure for causing the seal to leak a certain amount after the retainer has worn away the bearing a certain amount but is still maintaining the one ends in the telescoped relation thereof.

Abstract: A rotary pipe coupling with replaceable seals is described. The pipe coupling has a first seal element connected to a first body portion and a second seal element connected to a second body portion. The seal elements are defined stepped seal cavities into which are disposed seals. The first and second body portions are removably coupled to respective outer and inner ball races of a ball race to permit relative rotation of the first and second body portions. The effectiveness of the inner seal can be ascertained by detecting the pressure of fluid at port via a stop valve and passage extending to the interface between the seals. The seals can be replaced, if required, by separating first and second body portions by removing one set of fasteners securing one of the body portions to the bearing unit to expose seal cavities.

Abstract: A swivel joint for interconnecting two lengths of pipe, comprising an inner member (1) and an outer member (2), a chamber defined by the inner member (1) and the outer member (2) and accommodating bearing means (15a, 15b) locating the inner member (1) and the outer member (2) for rotary movement relative to one another. Pump means (8) for circulating lubricant within the chamber is provided, which pump means (8) is driven by relative movement between the inner member (1) and the outer member (2).

Abstract: A swivel joint assembly for plumbing systems includes a first fitting having a receptacle end and a second fitting having a plug end positionable in the receptacle end. The plug end and receptacle end having cooperating mating surfaces, one of which has a locking groove divided into first and second portions, the more distal of which is shallower than the other. The other surface has a groove to receive a locking ring also positioned in the locking groove. A barrel end of the plug receives a seal member to seal against the inner surface of the receptical end.

Abstract: A connector means which provides a fluid-tight seal, but with relative rotation of a pair of body members of a hydraulic line or device. Cylindrical extensions on both the body members, which interfit in assembly, have circumferential grooves facing one another and receive ball bearing members in the circumferential chamber provided by the grooves; and the arrangement is such that the bearing members act to block axial withdrawal of the body members from a tight sealing engagement with an O-ring which assures fluid-tightness of the joint even though the body members are relatively rotatable.

Abstract: A non-pressure balanced fluid conducting swivel joint for coupling high pressure hydraulic conduit comprised of first and second tubular housing sections which are coaxially interfit with each other and a tubular sleeve member supported intervening between superposed portions of the housing sections. The sleeve is secured thrust resistant and for rotation to the inner of the housing sections via a pair of spaced apart annular races containing bearings extending between the inner housing section and the sleeve member. The outer housing is rotationally interlocked with the sleeve member by virtue of a flexible circumscribing pin engaging an insert contained in an annular groove complementary formed between the outer periphery of the sleeve member and the inner diameter of the outer housing.

Abstract: This is a novel swivel joint for connecting two fluid conveying conduits. It includes an inner cylinder connected to one conduit and an outer cylinder connected to the other conduit. There is a double seal with a pressure chamber therebetween the two cylinders at one end thereof and a second double seal with pressure chamber therebetween at the other end. Four sets of bearing means are located between the inner and outer cylinders between the two double seals.

Abstract: A hose reel assembly comprising a frame, a reel including a rotational axis, and a first conduit partially extending along the rotational axis, the first conduit having a first end extending from the reel, and a second end adapted to be connected to a hose to be wound around the reel, a part-spherical member including a center located on the rotational axis, and a first fluid passageway centered on the rotational axis, a swivel member including a second fluid passageway centered on the rotational axis, and a portion received within the part-spherical member for rotation of the swivel member relative to the part-spherical member about the rotational axis, the swivel member being fixedly connected to the first conduit with the second fluid passageway communicating with the first conduit and with the first fluid passageway, and clamping members for mounting the part-spherical member on the frame and for permitting gyrating movement of the part-spherical member relative to the frame, the clamping members defining

Abstract: An end fitting provides a coupling for a pair of parts which may be misaligned. One of the possibly misaligned parts is a nut having a bore therein. The other part is a ferrule fitting in the bore and, preferably having a lip seal thereon. A pair of confronting annular U-shaped slots are formed in the two parts, with a pin wire ring resting in the slots in order to join the two parts. The cross-sections of the two U-shaped slots are skewed with respect to a perpendicular to the bore, by an angle in the range of 6-degrees to 45-degrees, with the preferred angle being 15-degrees. The pin wire ring rides up and down the resulting tapered walls of the slots to compensate for any misalignment.

Abstract: A rotatable swivel comprising a swivel body, a ball bearing assembly, and a primary upper seal axially offset from a primary lower seal for sealing a conduit chamber is disclosed. Pressurization of the conduit chamber of the swivel in cooperation with the differential axial offset of the primary seals creates axial pre-loading of the swivel operably aiding in the sealing of the conduit chamber and maintaining the concentricity of the bearing assembly between a rotatable outer ring and a stationary inner ring and providing wear compensation for the swivel. Secondary upper and lower seals are disclosed whereby if the primary seals fail to retain pressure in the conduit chamber, the respective secondary seal maintains the initial axial loading of the failed primary seal.

Abstract: A ball catch coupling for releasably connecting two parts which permits relative rotation of the parts in the connected conditions as an annular section carried on one of the parts with a number of uniformly disposed bores at a periphery thereof, balls respectively received and rotatable in each of the bores, a closed resilient ring surrounding the balls, an annular groove in the annular section which receives the ring and permits limited axial displacement and free rotation thereof within said groove, and the other part to be connected having an annular groove which at least partially receives the ring and the balls when the two parts are connected. The limited displacement and free rotation of the ring with respect to the annular section permits engagement and disengagement to be undertaken particularly easily and with low wear.

Abstract: A quick-coupling assembly for fluid conduits and of the kind comprising a first sleeve-shaped member, which at one end is provided with a number of resilient tongues provided with at least one projection intended to be locked behind at least one shoulder or the like in a second sleeve-shaped member for being connected to this and a ring being actually displaceable in the second member towards and away from the shoulder and being designed to cooperate with the tongues for compressing these so that they can be moved past the shoulder. The object of the invention is to provide a quick-coupling which despite high pressures (e.g. 350 bar) is easily rotatable so that a pressure hose connected to the coupling really can rotate, which is especially important at many hydraulic arrangement where relative movements occur between different structural parts connected to each other by pressure hoses.

Abstract: A system for repairing pipeline, such as underground fuel, gas or water pipeline systems which have been damaged by explosives, wherein the ruptured sections have been misaligned. Quick-connect fittings are attached to the misaligned pipe ends after trimming and a bridging conduit system is interposed between the fittings having adjustable portions for accommodating the misalignment. Rotative angular sections provide universal adjustment while retaining the fluid-tight integrity of the apparatus.

Abstract: A rotary joint or union characterized by its ease of assembly, disassembly and maintenance wherein a mounted internal condiut supports a rotary anti-friction bearing housing to which a seal housing is removably attached by bolts. A conduit port defined in the seal housing communicates with the interior of the conduit. A bearing retainer mounted upon the end of the conduit includes a seal having a radial face engaging the radial face of a seal mounted on the seal housing in a self-aligning manner. A compression spring maintains engagement of the seal faces through a seal assembly, and the seal housing seal is mounted within a retainer loosely keyed to the seal housing to facilitate self-alignment.

Abstract: A connector unit for a number of different coupling applications such as for interconnecting a pair of pipes or other structural parts which must be mounted near each other and at an angle with respect to each other. The connector unit includes a pair of side members which are spaced apart and to which are mounted the structural parts to be interconnected. Each side member has a respective ring rotatably mounted thereon by a first set of balls, and the two rings are rotatably coupled to each other by a second set of balls. Each set of balls is in an annular race formed by a pair of mating grooves. The balls of each set are fed into a respective race through a hole in the respective ring, then the hole is plugged to keep the balls in place. The race between the two rings is inclined at an angle relative to the race between each side member and the respective ring.

Abstract: A fluid swivel coupling is provided for interconnecting two fluid conduits so as to permit relative rotational movement between the interconnected fluid conduits about two axes at the coupling which are perpendicular to each other. The swivel coupling includes a swivel body connectable to a fluid conduit and adapted to accept for rotational movement a spindle member including a "U" shaped yoke rotatingly supporting a fluid conduit connector between the arms thereof. The swivel coupling is provided with a passageway between the interconnected fluid conduits which is continuous and remains uninterrupted throughout the range of movement of the swivel coupling.

Abstract: A constant motion swivel seal assembly having greatly improved useful life without leakage of fluid from a swivel joint. The seal assembly includes one or more annular sealing rings rotatably positioned between an outer joint member and an inner joint member. A wedge-shaped anti-extrusion ring mounted between the annular sealing ring and a gap between the inner and outer joint members prevents the sealing ring from extrusion into the gap. The anti-extrusion ring has a relatively large surface area in contact with the inner joint member and a relatively small surface area in contact with the outer joint member so the anti-extrusion ring remains in substantially the same position relative to the inner joint member. The relatively small area of contact between the outer joint member and the anti-extrusion ring allows the anti-extrusion ring to slide over the surface of the outer joint member as the outer joint member rotates relative to the inner joint member.

Abstract: The present invention relates to a flowline swivel. The swivel is configured so that the product seals are easily replaceable, the included bearing are not exposes to contamination either during use or during replacement of the product seals, and the seal surfaces may be cleaned without disturbing the bearings. The swivel incorporates removable product and environmental seal surfaces.

Abstract: A multi-plane swivel connector for use in attaching a pair of fluid conveying members together, the connector including a pair of swivel portions, that connect together at proximate ends, one end being insertable within the other, a double sealed connection provided at the junction of the connection of the swivel ends together, there being a swivel nut securing externally to the outer end of one of the pair of swivel portions, there being a double sealed connection provided between the said swivel nut and the said contiguous swivel portion, there being a pair of O-rings provided at each of the double sealed connections between the swivel portions, and the connection of the swivel nut to one of these swivel portions, said pair of O-rings at each double sealed connection being of step relationship with one O-ring being of greater diameter than the other O-ring, one of the O-rings being formed of fluoro carbon, while the other O-ring of each double sealed connection being formed of fluoro silicone; and during th

Abstract: An unrestricted, leakproof, rotatable fluid flow joint comprising: a flexible rod mechanism, a first elbow, a second elbow, and a resilient O-ring; the first elbow including a mechanism for rotatably receiving the second elbow, a mechanism for rotatably connecting the elbows with the flexible rod mechanism, and a mechanism for guiding the flexible rod into the mechanism for rotatably connecting the second elbow including a mechanism for rotatably mating with the mechanism for receiving and mechanism for rotatably connecting the elbows wherein the flexible rod slidably inserts within at least a portion of the mechanism for rotatably connecting to connect the first and second elbows; and wherein at least one of the elbows includes a mechanism for holding the O-ring between the flexible rod and the end of the second elbow, the O-ring disposed in resilient contact with and between the mechanism for receiving and the mechanism for mating.

Abstract: A stationary annular plenum rotatably mounted upon a hollow shaft receives air from a stationary source of air under pressure. A spring loaded first ring within the plenum conveys the air through apertures therein from the plenum to corresponding apertures in an adjacent second ring, which rings are maintained in alignment with one another and the plenum by a plurality of dowels. An annular channel disposed in a radial face of the second ring interconnects the apertures extending through the ring; the channel mates with a corresponding channel of an adjacent disc fixedly mounted upon the shaft to convey air from the stationary elements to the rotating elements. An air seal between the second ring and the disc is formed by interfacing flat annular radially oriented surfaces on opposed sides of the respective channels. The disc includes a radial passageway interconnecting the channel formed therein with the bore of the hollow shaft to direct air into the bore.

Abstract: An automatic hot melt adhesive dispensing gun is connected by a swivel assembly to a working arm of a programmable working machine. The swivel assembly includes a hollow spindle journalled in the gun block of the gun. The free end of the spindle is connected to a hot melt adhesive source via a hose. The gun block rotates relative to the spindle. The gun can thus move in response to the movement of the working arm without exerting harmful torques on the hose.

Abstract: A connector assembly for connecting a faucet body to a swivel spout. The connector assembly comprises a spout hub fixedly attached to the spout, a spout socket fixedly connected to the faucet body and rotatably received within a through passageway in the spout socket, and a resilient flexible lock ring disposed between the spout hub and spout socket. The lock ring integrally comprises a collar extending at least partially around the spout hub and a pin projecting outwardly from the collar. The lock ring collar is normally inwardly flexed and urges against the interior of the spout socket. The spout socket is provided with a side opening which receives the lock ring pin under urging from the collar. Interference contact between the spout socket and the pin within the side opening serves to limit longitudinal movement of the spout hub inside the spout socket.

Abstract: A movable carrier for fixed supply lines which are placed along a telescoping airplane passenger bridge and which establish communication between connectors on the airport terminal and corresponding connectors on the aircraft. The carrier is a supply line system, the length of which cannot be varied, and which includes a plurality of linear conduits having swivel joints interposed on those ends thereof which face one another. At least two adjacent conduits are vertically angularly movable, and have one end thereof held in position. Each conduit, along sections thereof, is provided with two-part support brackets which are embodied as clamps and are provided with holding devices for receiving further supply lines which are arranged around the conduit.

Abstract: A seal pressure reduction system for protecting fluid seals located in the sealing gap between the moving parts of a fluid-carrying system from deterioration due to chemical action, excessive temperature or excessive pressure is disclosed. A first seal resistant to chemical action and excessive temperatures is installed in the sealing gap such that the front side of the first seal is in contact with the production fluid. A second seal resistant to excessive pressure is installed in the sealing gap between the first seal and the ambiance to form a sealed cavity along the sealing gap. A hydraulic fluid is located in the sealed cavity. A hydraulic pressure means located between and communicating with the production fluid and the hydraulic fluid is used to pressurize the hydraulic fluid. The hydraulic pressure means is actuated by the pressure of the production fluid to pressurize the hydraulic fluid to a pressure greater than, less than, or equal to that of the production fluid.

Abstract: A high pressure rotary union includes a housing enclosing a hollowed shaft. seal enclosure is keyed within the housing and receives a sealing ring which is biased by a circular spring to maintain low friction intimate sealing engagement between the ring and shaft despite minor eccentric shaft displacement.

Abstract: A fluid swivel coupling is provided for interconnecting two fluid conduits so that they may swivel or rotate about their common axis. The coupling includes a swivel body connected to one fluid conduit and adapted to accept for rotational movement therein a spindle which is connected to a second fluid conduit and which is provided with an axial fluid bore which communicates between the two fluid conduits. The swivel coupling further includes a packing seal for preventing leakage between the swivel body and spindle. That part of the coupling moving with respect to the packing seal is formed of a very hard, wear resistant material in order to prevent leaking as a result of wear.

Abstract: A swivel joint for handling fluids which is used to connect open-ended male and female pipe sections. A retainer in the form of an annular split ring is mounted circumferentially about the male pipe section in a groove formed on its outer surface. The split ring includes thrust and radial transfer surfaces which cooperate with complementary surfaces formed on solid annular bearings which are disposed generally between the split ring and the female pipe section. The complementary surfaces transmit both radial and thrust loads through the split ring and bearing. An assembly nut connects the male and female pipe sections, split ring and bearing together.

Abstract: The present invention in a rotary coupling or swivel is arranged for maintaining together, respectively, stationary and rotating pipes wherethrough a fluid under pressure is passed and involves an outer stationary body with an inner body journaled therein. The two bodies are held together by positioning a number of hardened balls within complimentary grooves formed, respectively, around the stationary body inner circumference and around the inner body outer circumference, the aligned grooves forming a track or race wherein the hardened balls roll freely. The hardened balls are dropped into the grooves through a port formed through the stationary body, holding the bodies together and functioning as a roller bearing to carry high thrust loads beyond the pressure loading.

Abstract: A first quick-coupling member (1) is adapted for introduction into and removal from a recess (2a) situated in a unit which can cooperate with the first coupling member, for example a second coupling member (2). A protective sleeve (4) is disposed on a body surface (1d, 1e) present at the front portions of the first coupling member. The protective sleeve is longitudinally displaceable in the longitudinal direction of the first coupling member, besides which the external diameter (d3) of the protective sleeve exceeds the internal diameter (D3) of the recess. In an initial position, the protective sleeve is conveyed forwards towards the front end (1c) of the first coupling member where it prevents the access of impurities to the front portions (1d) of the body surface. When the first coupling member is introduced into the recess, the protective sleeve is displaced longitudinally backwards on the first coupling member to expose its parts (1b) which is introduced into the recess.

Abstract: A coupling comprises a sleeve shaped member (5) which has an external toothing (11), an internal threading (12) and also a tubular guiding portion (13). An annular member (14) surrounding the toothing (11) is rotatably mounted over the sleeve shaped member (5) and has a handle (28) and a reversible catch (22) to engage the toothing. A coupling member (29) to be threadingly connected to the sleeve shaped member (5) has for that purpose an external threading (30) as well as a saw tooth shaped, peripheral bead (31) to obtain a guide function by cooperation with the tubular guiding portion (13). A further coupling member (1) is rotatably but non-displaceably connected to the sleeve shaped member (5) and has in the end surface thereof a groove (3) having a dovetail section and an O-ring (4) inserted thereinto.

Abstract: A fire-safe seal for use in a swivel joint in a pressurized fluid system subject to fire risk, the seal having both a metal anti-extrusion ring and an annular resilient non-metallic seal member to provide essentially zero fluid linkage at normal operating temperatures, and the anti-extrusion ring to provide an extremely low rate of leakage in the event high temperature should destroy the resilient seal member. A curved spring or other metal anti-cocking device biases the anti-extrusion ring tightly against the junction of a male and a female joint to ensure that the ring remains in position after the resilient seal member is destroyed to prevent leakage through the junction.

Abstract: A stroke cushioning apparatus for a hydraulic cylinder provided at rod side stroke end and/or head side stroke end. The rod side stroke end cushioning apparatus comprises a sleeve mounted on a piston rod and a cushion ring mounted on the inner face of a housing defining a passage which accommodates the sleeve when a piston assembly is moved to its rod side stroke end. The cushion ring is allowed to move slightly in an axial direction. When the piston assembly is moved towards its rod side stroke end and the sleeve enters into the passage, flow of fluid is restricted between the cushion ring and the sleeve thus effecting a cushioning action to the piston assembly.The head side stroke end cushioning apparatus comprises a plunger mounted to the piston rod and wall of a passage formed at the head end of the cylinder. The plunger is mounted to the piston rod by means of a plurality of balls with allowing slight movements of the plunger both axially and radially.

Abstract: A swivel joint having improved bearing and seal life includes a pair of annular inner members each rotatably mounted in the bore of an annular sleeve with the ends of the inner members spaced from each other. An overrunning clutch between a first inner member and the sleeve allows the first inner member to rotate in a first direction relative to the sleeve, but prevents rotation in a second direction. Another overrunning clutch between the sleeve and the second inner member allows the sleeve to rotate in the second direction relative to the second inner member, but prevents rotation in the first direction. Bearings and seals mounted between the sleeve and the first inner member experience unidirectional rotation in the first direction and bearings and seals between the sleeve and the second inner member experience unidirectional rotation in a second direction. The overrunning clutches prevent oscillatory motion of the seals and bearings, and decreases wear and failure of the seals and bearings.

Abstract: A fluid set and spring released clutch according to the teachings of the present invention is shown as including a one-piece hub including a cylindrical portion having a first tapered hole portion for securement to a shaft and a second cylindrical hole portion for receiving a rotary air union. A radially extending flange portion terminating in an annular lip is formed on the cylindrical portion of the hub and forms an annular cavity for the reciprocal receipt of a piston. The clutch further includes a pulley rotatably received on the hub having a recess formed therein. An extension integrally attached to the piston extends into the recess of the pulley for providing friction engagement therebetween. The piston is mounted by bolts threadably secured into the extension and reciprocally received in the annular lip of the hub. The piston is biased into the cavity by springs located between the piston and the hub.

Abstract: A swivel unit for inflatable packer drill stem test tools has an outer housing with a lower end adapted for connection to the drill stem and an upper end. An inner shaft has a base portion received within the outer housing and has a neck portion which protrudes from the outer housing. Tapered roller bearings located between the outer housing and inner shaft at opposing ends of the inner shaft base portion rotatably mount the outer housing about the inner shaft. The outer housing has a shoulder formed in its external surface for receiving the derrick elevators and supporting the test tool assembly.

Abstract: A microscope objective mount is described for screwing onto a microscope, said microscope having a tube which is rotatable around the mount and is held onto the mount. The mount is distinguished in that the tube extends over approximately the entire length of the mount, with the tube and mount being releasably connected together by a catch connection.

Abstract: A rotating union wherein an inner cylindrical tube fits within an outer coaxial cylindrical tube. First and second bearings are between the tubes with the first bearing being closer to the end of the outer tube. The first bearing is attached to absorb substantially all expansive axial forces imposed between the tubes. The second bearing is generally spaced from the first bearing. The second bearing is attached for absorbing substantially only radial forces imposed on the tubes. Packing is axially compressed between the tubes to provie radial expansion sealing therebetween. A structure is provided which accomplishes, in certain embodiments, adjustable axial compressing of the packing from the exterior of the outer tube. The axial compressing in all embodiments is preferably spaced from and non-communicating with the inner tube.

Abstract: A swivel joint for connecting together a pair of pipes and for transferring fluid between the pipes at ambient temperatures and at cryogenic temperatures. A cryogenic seal between the joint's relatively rotatable inner and outer elements prevents fluid leakage at cryogenic temperatures, and an ambient seal assembly between the joint elements provides a seal at ambient temperatures and prevents fluids from contacting the cryogenic seal. The ambient seal assembly includes an elastomeric O-ring retained in the outer element, and an annular sealing ring fastened to the inner element and spring-biased towards the O-ring. At ambient temperatures the sealing ring is held against the O-ring in a fluid-tight manner. As the temperature decreases, a plurality of rods or wires, or an annular sleeve, having a high coefficient degree of linear expansion, contracts and pulls the annular sealing ring away from the adjacent O-ring to prevent wear of, and other damage to, the O-ring at low temperatures.

Abstract: The invention relates to a coupling system for coaxial hoses adapted to feed fluid into hydraulic machines and apparatus and to provide an exit for same, such a system ensuring conveniently and speedily under good operative conditions, a disconnectable fitting of the ends of the input and output pipes respectively on a body such as a union connected in its turn with a supply of a compressed fluid, and with a handtool such as hydraulic shears or pruning-scissors or else a machine-tool such as an air-hammer or a hydraulic machine, to be used on the yard.

Abstract: A swivel cartridge for attachment to the stationary outlet of a fluid supply to allow a fluid delivery hose to be moved freely about the supply outlet includes an inlet tube adapted for connection to the supply outlet, an outlet tube having a nose at one end received in a bore in the inlet tube and having a hose connection at the other end, a ring seal mounted on the nose closing a clearance between the bore of the inlet tube and the outside of the nose, and a ball bearing having an inner race connected to the inlet tube and an outer race connected to a housing which rotates with the outer race relative to the inlet tube and to which the outlet tube is removably secured. The nose is provided with a circumferential groove in which the ring seal is mounted.

Abstract: A rotary joint utilizing a single anti-friction bearing interposed between the static and dynamic components wherein a self-aligning or floating seal is utilized to maintain effective sealing in the event of misalignment. The rotary joint includes a bearing supported sleeve to which a conduit adapter may be affixed in such a manner to mount and locate the bearing on the sleeve, and the components are economically manufactured wherein a dependable and efficient rotary joint may be produced at low cost.

Abstract: Multiple wall drill pipe adapted for use in a drill pipe string comprising an outer pipe member; an inner pipe member disposed within the outer pipe member; and means for releasably connecting the inner pipe member and the outer pipe member in fixed axial relationship under force loads applied in use during a drilling operation while enabling relative rotary movement between the inner pipe member and the outer pipe member during a rotary drilling operation to relieve torsional stress thereon, and for permitting the removal of the inner pipe member from the outer pipe member by relative axial displacement therebetween caused by application to the inner pipe member of only an axially directed force load in excess of the axially directed force loads applied to the inner pipe member in use during a normal drilling operation.