Abstract: A swivel bayonet joint for transferring cryogenic fluids includes a plug bayonet joint and a socket bayonet joint. The plug bayonet joint has an insertion stem with an insertion jacket surrounding and co-axial with a plug inner line of a corresponding pipe section, and a first clamp member having at least one race. The socket bayonet joint has a vacuum jacket at a distal end thereof that sleeves over the insertion stem of the plug bayonet joint, and a second clamp member having at least one race. When the plug bayonet joint is mated with the socket bayonet joint, the race of the plug bayonet joint aligns with the race of the socket bayonet joint to define a clamp member that is filled with ball bearings, the ball bearings functioning to lock the plug bayonet joint to the socket bayonet joint so as to allow rotation therebetween.

Abstract: A connector assembly for connecting a valve seat with an outlet pipe and a faucet having the same are provided. The valve seat includes an outlet channel provided with an insertion hole and a first axial connection portion arranged at an outer cylindrical wall thereof. The first axial connection portion is located below the insertion hole. The outlet pipe includes an inlet end provided with a mounting portion and a second axial connection portion arranged at an outer surface of the outlet pipe and located close to the mounting portion. The second axial connection portion is detachably mounted into the first axial connection portion from bottom up to form a rotation point. By the outlet pipe rotated around the rotation point, the mounting portion is forced to be mounted and positioned inside the insertion hole of the valve seat firmly with sealing effect.

Abstract: An example portable fluid spraying system includes a handheld fluid sprayer. The handheld fluid sprayer includes a fluid reservoir configured to store a fluid, a pump configured to pump the fluid from the fluid reservoir to an outlet of the handheld fluid sprayer and a handle. The handheld fluid sprayer includes a first trigger proximate the handle, configured to control fluid flow to the outlet. The portable fluid spraying system includes a fluid hose having a coupling mechanism configured to removably couple to the handheld fluid sprayer proximate the outlet and a fluid spray gun. The fluid spray gun includes a gun inlet configured to couple to the fluid hose and receive the fluid from the handheld fluid sprayer, a gun outlet configured to expel the fluid in a spray pattern and a second trigger configured to control fluid flow to the gun outlet.

Abstract: A rotational coupling including a bearing assembly including a first race rotatably coupled to a second race, wherein the first race is configured to receive a plurality of first fasteners to couple the first race and the bearing assembly to a fluid supply. The rotational coupling also including a connection flange coupled to the second race and configured to receive a plurality of second fasteners to couple the connection flange to the second race. The second race includes a first side facing the connection flange and a second side opposite the first side and facing the first race, wherein the second race includes at least one access aperture configured to enable access to the plurality of first fasteners from the first side to removably couple the bearing assembly to the fluid supply.

Abstract: A fitting (1) for connecting pipes (T) comprises a first tubular element (3), defining at its interior a first duct (3b), and a second tubular element (4), defining at its interior a second duct (4b). The fitting includes a first bushing (11), externally surrounding the first tubular element and creating an annular housing (12). The fitting also includes a first bushing-holder (30), externally associated with the first tubular element and configured for mounting the first bushing, including a seal portion (31) externally wound around a seal sector (40) of the first tubular element. The seal portion is interposed between a portion of a pipe, inserted in the annular housing and the seal sector, and attains a fluid-tight gasket when the first bushing is in a clamping configuration.

Abstract: Described are systems and methods for a hydraulic swivel. The hydraulic swivel receives fluid flow in one direction and, in certain configurations, changes the direction of the fluid flow to a second direction before the fluid leaves the hydraulic swivel. The hydraulic swivel includes a first banjo, a second banjo, and a base. The banjos of the hydraulic swivel are configured to be repositioned.

Abstract: Various exemplary devices and methods for heating fuel hoses and nozzles are provided. In general, the devices and methods for heating fuel hoses and nozzles can be configured to heat fluid dispensable by a user into a fuel tank or other type of container. In some embodiments, a fuel dispensing device can include a first passageway configured to pass fluid therethrough and can include a second passageway configured to pass heated air therethrough. The heated air passing through the second passageway can be configured to heat the fluid passing through the first passageway. In some embodiments, a fuel dispensing device can include a single hose configured to pass fluid and heated air through separate passageways therein, and the device can include a manifold configured to facilitate passage of the fluid and the heated air from separate sources into the single hose.

Abstract: A swivel joint includes a first pipe section and a second pipe section. The pipe sections may define a flow path via which fluid passes through the swivel joint. One or more surfaces proximate a junction of the first pipe section and the second pipe section may be selectively coated to resist wear from erosion, corrosion, and or abrasion.

Abstract: A high pressure swivel joint used in pipe assemblies transferring high pressure fluid. The swivel joint comprises a first pipe section and a sleeve-like second pipe section. The first pipe section is inserted into the second pipe section and the sections are relatively rotatable. A wear ring is positioned within a recess formed in the inner wall of the first pipe section. A second wear ring is positioned within a recess formed in the inner wall of the second pipe section.

Abstract: A gas pipe joint contains: a connection pipe, a first threaded pipe, and a second threaded pipe. The connection pipe includes a first part and a second part, the first part has a first threaded orifice, and the second part has a second threaded orifice. The first threaded pipe includes a first coupling section, a first nut section, and a second coupling section. The second threaded pipe includes a second nut section and a third coupling section, the second nut section has a second screwing portion, and the third coupling section has at least one second recessed portion and a second groove. The third coupling section has a second shoulder. The second shoulder has a second lower gasket. The first groove has two first loops, and the second groove has two second loops.

Abstract: A rotary swivel joint preferably includes a swivel housing, a rotary swivel, an end plate, two sets of sealed bearings, a swivel seal and an O-ring. The swivel housing includes a threaded tube inlet and a swivel receiver bore. The rotary swivel includes a through bore, a threaded swivel inlet, a bearing diameter and a sealing diameter and an outer diameter. An O-ring groove is formed in the bearing diameter to receive the O-ring. The first and second sealed bearing sets are retained on the bearing diameter and axially retained with a plurality of snap rings. The swivel seal is retained on the sealing diameter. The rotary swivel is inserted through a center bore in the end plate. The end plate is preferably fastened to the swivel housing with a plurality of fasteners.

Abstract: A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

Abstract: An intervertebral cage includes a plurality of segments that are connected together by one or more members formed from a shape memory alloy material such that the segments are automatically moved from an initial orientation before implantation/insertion in an intervertebral space to an expanded orientation after implantation/insertion in the intervertebral space. Each of the plurality of segments may have a plurality of passageways or recesses formed therethrough, and wherein a wire formed from a shape memory alloy material extends through each of the plurality of passageways or recesses. The member may be formed from a shape memory alloy material that demonstrates shape memory effects and superelasticity properties, such as nitinol.

Abstract: A rotatable flanged component is adapted for assembly into a flow line of a high-pressure fluid transportation system. The rotatable flanged component comprises a body and a conduit. The body has at least two ends. The conduit extends between the ends. The rotatable component also has a flange and a union face at each of the ends. The flanges and union faces are adapted to provide a flange union between the component and other flowline components at each the body end. At least one of the flanges is a rotatable flange. The rotatable flange has a central opening and a plurality of holes. The holes are adapted to accommodate threaded connectors for loading the flange with an axial force. The flange is mounted on the body end through the central opening for rotation and for transmission of the axial force to the body end.

Abstract: A medium connector including a passage configured to allow for the flow of medium, and a multi-portion engagement surface positioned about the passage. The multi-portion engagement surface includes a first surface portion, and a second surface portion. The first surface portion is configured to provide an interference fit with a corresponding sealing surface of a mating connector. The second surface portion is configured to provide a clearance fit with the corresponding sealing surface of the mating connector. The ratio of the first surface portion and the second surface portion is selected to regulate an engagement force between the medium connector and the mating connector.

Abstract: A connection device for pipes including a first hose-holder (18) mounted on an end portion (3) of the pipe, a second hose holder (16) mounted on the other end portion (6) of the same pipe and a connection element (15) for the connection of the first and second hose-holders (18,16). The connection element (15) consists of a substantially tubular body having a longitudinal hole (30), and a circulating ball portion (17) for the connection to one of the first hose-holder (18) or the second hose-holder (16).

Abstract: A transmission, in particular a coaxial transmission or linear transmission, comprising a toothing, a tooth holder in which a plurality of tooth segments are accommodated to engage with the toothing, wherein the tooth segments are borne to be radially shiftable relative to the tooth holder, a drive element having a profiling for radially driving the tooth segments borne in a radially shiftable manner, wherein the transmission has inner initial stress.

Abstract: The present invention provides a socket wrench, including a main body and a control sleeve. The main body includes a socket end and a connection end. The socket end is configured to be connected with a fastener. The connection end is configured to be connected with the insertion portion. The connection end includes at least one first through hole. At least one positioning member is movably restricted within the at least one first through hole. The control sleeve is movably assembled to the connection end. The control sleeve includes a first portion and a second portion. The first portion has at least one receiving hole which is selectively correspondable to the at least one first through hole. The first portion is inserted into the second portion. The at least one receiving hole is disposed inside the second portion.

Abstract: A rotation damper includes a damper housing that surrounds an electromagnetic damper motor which is disposed along a central axis of the rotation damper and which includes a rotor and a stator, and also surrounds means for generating a magnetic field on the rotor and the stator. The rotation damper further includes a coupling lever connected to a second mass, and a gear mechanism for transmitting and/or converting a relative rotation between the masses to the damper motor such that vibrations are dampened. The fastening part is connected to the damper housing for conjoint rotation therewith. The fastening part, along with the damper housing, is rotatably mounted on a bearing shaft-that is connected to the coupling lever. The gear mechanism and the damper motor are rotatably mounted on the bearing shaft.

Abstract: This male or female quick coupling element (4; 6) is intended to be coupled to a pressurized fluid pipe (C4; C6). It comprises a body (42; 62) defining at least one pressurized fluid passage (441, 643, 681), a front face and a longitudinal axis (X4; X6) of the coupling element. An inner part (48; 64) arranged in the body is provided with a surface belonging to the front face, as well as a drain passage (482, 484; 642, 644) coupling the pressurized fluid passage and the outside of the coupling element. An opening mechanism (54, 56, 58, 59; 74, 76, 78, 78) is intended to be actuated from the front face of the coupling element to open the drain passage. The inner part (48; 64) is provided with a peripheral groove (484; 644) in which a seal (59; 79) rests that closes off the drain passage (482, 484; 642, 644) in a closing off portion.

Abstract: In this hollow strain wave gearing unit, a shaft end part of a hollow rotary shaft of a wave generator is located inside a cup-shaped flexible external gear. The shaft end part is supported by a bearing attached to a bearing holder that is fixed to a boss of the flexible external gear. In the bearing holder, an elastic leaf spring part that is displaceable in the axial direction constitutes a part that supports a holder body part that holds the bearing. A preload is applied by the leaf spring part to the bearing in the axial direction. Thus, there is no need to separately arrange a preload application member inside the flexible external gear, and the axial length of the hollow strain wave gearing unit can be shortened.

Abstract: A fuel cup including a central longitudinal axis and being fixable to an injector via a holder comprises a fuel cup body and a fixing element. This fuel cup is wherein said fixing element is a stamped tab affixed to said fuel cup body, and in that said stamped tab is designed to be engaged to said holder.

Abstract: An anti-tangling coupling device has an inner portion which is rotatably engaged with an outer portion. Fluid containment devices such as hoses can be coupled at either end of the device. One hose is secured to the inner portion while a second hose is secured to the outer portion, with the hoses being positioned at opposite ends of each other. Fluid communication is maintained throughout the inner portion and the outer portion, allowing water to flow between hoses coupled with the device. The rotational engagement is achieved by a bearing assembly, the bearing assembly including an inner race, and outer race, and ball bearings secured in cages. The ball bearings are capable of rotational movement (imparted from contact with the first race and second race), but are prevented from translational movement by a cage. As a result the likelihood of tangling between coupled hoses is greatly reduced.

Abstract: A motor-incorporating reducer includes a main body, a rotational actuating member, a flex spline, and an circular spline. The rotational actuating member has a rotating shaft, a wave generator, and a motor. The rotating shaft passes through the main body, and the elliptic wheel is integratedly formed around the rotating shaft. The motor has a magnetic motor rotator that is integratedly formed on the rotating shaft. With the integrated structure, the rotating shaft, the elliptic wheel, and the motor rotator can stably perform rotation, thereby eliminating the risk that the three, when formed separated and assembled, would become non-coaxial due to the resultant tolerance after assembly and have eccentric rotation, and in turn preventing adverse effects on the drive's output torque due to non-coaxial rotation and extending the drive's service life.

Abstract: A rolling element bearing retention arrangement provides axial and rotational retention of a rolling element bearing within a housing. A retaining ring is received partially within circumferential grooves located on an outer ring of the rolling element bearing, and within a bore of the housing, providing axial retention. Inward and outward directed protrusions on each end of the retaining ring engage cavities within the respective circumferential grooves, providing rotational retention.

Abstract: An offshore power generation structure comprising a submerged portion having a first deck portion comprising an integral multi-stage evaporator system, a second deck portion comprising an integral multi-stage condensing system, a third deck portion housing power generation equipment, cold water pipe; and a cold water pipe connection.

Abstract: A derailleur includes a fixed component, a movable component, a linkage component, a deceleration component and a drive component. The fixed component is for being fixed to a bicycle frame. The movable component is for being fixed to a chain guide. The linkage component includes a first linkage and a second linkage. Two ends of the first linkage pivot on the fixed component and the movable component, respectively. Two ends of the second linkage pivot on the fixed component and the movable component, respectively. The deceleration component includes a circular spline, a flex spline and a wave generator. The flex spline is disposed inside the circular spline, for rotating the first linkage and the second linkage relative to the fixed component. The wave generator is disposed inside the flex spline. The drive component is connected to the wave generator, for rotating the wave generator.

Abstract: Systems and designs are provided for a flexible connector to be used in fuel and hydraulic lines that can withstand a high level of internal and external stress. In one example, the connector consists of three separate components, an upper, a lower and a middle portion. Spherical bearings and compression springs are used o couple the three portions together. Spherical bearings provide the ability of the connector to rotate about an axis, while the compression springs hold together the system.

Abstract: A wave generator of a strain wave gearing has a plug, a wave generator bearing mounted to an outer peripheral surface of the plug, an input shaft protruding from the center of the plug to a first side running along a center axis, and a bearing arrangement on which a support bearing supporting the input shaft is arranged. Relative to an outer ring end surface of the wave generator bearing that faces the first side, a center-side plug end surface of a plug end surface facing the same direction is in a position withdrawn from the first side toward the opposite direction. The bearing arrangement is provided between the center-side plug end surface and the outer ring end surface encircling the input shaft. The input shaft can be fitted within the width dimension of the wave generator, and a strain wave gearing having a short axial length can be achieved.

Abstract: Dual directional latch devices or connectors are described wherein a first connector component and a second connector component have a first latched position and a second latched position when moving in a first direction and wherein movement in a second direction is also possible depending on a stop feature. As described, a combination key and key way, a movable sleeve, a stop flange, and a threaded sleeve may be provided to stop movement in the second direction. The dual direction latch devices may be used with articles of manufacture such as with implantable medical devices, door panels, airplane panels, and drilling devices, to name a few.

Abstract: An offshore power generation structure comprising a submerged portion having a first deck portion comprising an integral multi-stage evaporator system, a second deck portion comprising an integral multi-stage condensing system, a third deck portion housing power generation equipment, cold water pipe; and a cold water pipe connection.

Abstract: An antenna mounting system for use with recreational vehicles and boats as well as stationary objects. The system includes a pedestal securable to the recreational vehicle and an antenna head containing an antenna element and securable to the pedestal. The pedestal has an upstanding male portion slidably receivable in a mating, female portion of the antenna head. In assembling the system, the male and female portions are first axially aligned and then moved axially toward each other to a predetermined, operating position where they are snapped together in a locking engagement. Anti-rotation structure including one or more pairs of mating, channels and protuberance is also provided to prevent the pedestal and antenna head from being rotated relative to each other about their aligned axes (and the coaxial cable running through them from being twisted) as they are moved together to the predetermined and locked, operating position.

Abstract: A ball plug seals a bearing race holding ball bearings and grease. The plug has a rubber body with a pair of metal disks on an upper surface. The metal disks are separated by a gap so that when they are urged toward one another, the rubber body is compressed. This allows the outer periphery of the metal disks to be received in a mating circumferential groove provided adjacent an end opening of the bearing race. Upon release of the metal disks, the rubber body relaxes and the plug is securely retained within the opening of the bearing race.

Abstract: The invention relates to an apparatus (10) for the rehabilitation of pipelines using a fluid line system (28) with at least one fluid line (54, 56) for supplying and/or removing a fluid medium, wherein the fluid line system (28) is provided with at least one pivot joint (30).

Abstract: A strain wave gearing unit is provided with an internal gear, which surrounds the periphery of a cup-shaped external gear, and a bearing. An annular gap is formed between the inner ring of the bearing and the internal gear. The gap communicates with the sliding portions of the bearing and the section where the two gears mesh. An annular filter member made of non-woven fabric is fitted in the gap. Foreign matter such as abrasion powder, which is contained in lubricant that flows in the gap, is trapped by the filter member. The present invention can prevent penetration of abrasion powder generated in the sliding portions into the meshing section via the gap.

Abstract: A ring element, particularly a thrust bearing race ring, which has a peripheral wall, through which a radial load exerting an interference fit occurs. The peripheral wall is configured such that it forms zones with a large overlap and zones with a reduced overlap that succeed each other in a peripheral direction.

Abstract: This disclosure describes systems and methods for displaying information that describes the accuracy of estimated values of physiological parameters. As part of the process of estimating a physiological parameter, the data used for the estimation are further analyzed to determine one or more statistical parameters indicative of the accuracy of the estimate. These statistical parameters are then displayed to the caregiver in order to provide the caregiver additional information concerning the estimated value. In the systems and methods described herein, one or more probability analyses are performed on the data used to generate the estimate of the physiological parameter. The analyses may include calculating the accuracy, confidence interval or some other statistical parameter representative of the accuracy of the estimate of the physiological parameter from the variations in the data An indication of the accuracy and/or an indication of the calculated probability may then be displayed to a caregiver or user.

Abstract: An apparatus providing relative rotation between a garden hose and a hand-held nozzle includes a nozzle main body and a fluid connection member that engages the hose. A lower saw gate is mounted within the fluid connection member and rotates with it. An upper saw gate is mounted within the nozzle main body and rotates with it. A spring urges the upper saw gate to bear against the lower saw gate. A plurality of teeth is formed in the lower saw gate and a mating plurality of teeth is formed in the upper saw gate. The spring holds the lower and upper saw teeth in engagement with one another when a user rotates the nozzle main body. The user squeezes a pivotally mounted handle to overcome the bias. The teeth disengage from one another, allowing the inherent bias of the hose to return the hose to its position of repose.

Abstract: A swivel joint has uniform ball bearing requirements for all bearing races. The swivel joint has a male connector and a female connector that coaxially interconnects and swivel relative to each other while still maintaining a high pressure seal. Each connector has three bearing races to form three sets of bearing races, each of which supports the same number of ball bearings. The circumference of the main set of races are enlarged by less than the diameter of one ball, so it is impossible to add another ball to the coupled male and female connectors of the swivel joint.

Abstract: Systems and methods for connecting misaligned pipe sections, where two sets of variably spaced bearings enable the transfer of evenly distributed pressure from a collar member to a coupling member. One embodiment comprises a misalignment coupling that includes first and second coupling members, a collar, and two sets of bearings. The collar is positioned around the second coupling member and has a flange for coupling to a flange of the first coupling member. The bearings are positioned in an annular space between the second coupling member and the collar. The two sets of bearings have variable spacing and are interleaved, with one set contacting the collar and one set contacting the second coupling member. When the flanges are secured to each other, contact pressure is transferred from the collar through the bearings to the second coupling member, thereby applying contact pressure between the first and second coupling members.

Abstract: A swivel joint has uniform ball bearing requirements for all bearing races. The swivel joint has a male connector and a female connector that coaxially interconnect and swivel relative to each other. Each connector has three bearing races to form three sets of bearing races, each of which supports that same number of ball bearings. The circumference of the main set of races are enlarged by less than the diameter of one ball.

Abstract: A gas tube structure includes a flexible tube. The end of the flexible tube is connected with a fixed connector. A sleeve is fitted on the fixed connector. The fixed connector and the sleeve are connected to a movable connector. The fixed connector has a connection section extending from an outer end thereof. The connection section has an annular seal groove and an annular buckle groove thereon. The sleeve has a sleeve hole therein, a stop flange at one end thereof and an engaging groove formed on in inner wall thereof. One end of the movable connector has a receiving hole and a C-shaped groove formed on an outer wall of the receiving hole. The C-shaped groove is adapted to receive a C-shaped buckle. The present invention has a stable connection, is safe for use, can lower the cost and enhances assembly efficiency.

Abstract: A fluid handling swivel joint and fluid conveyance equipment incorporating the same includes a first flanged portion, a tail portion that form a conduit. The fluid handling swivel joint also includes a body secured to the first flanged portion and at least partially surrounding the tail portion, where the body and the tail portion form a raceway. The fluid handling swivel joint further includes a primary seal positioned between the first flanged portion and the tail portion, and a secondary seal positioned between the first flanged portion and the tail portion and radially outward of the primary seal. The fluid handling swivel joint also includes a first environmental seal and a second environmental seal positioned to contact two of the first flanged portion, the tail portion, and the body to form an isolated volume around the plurality of roller elements.

Abstract: A clip for a quick connect hose coupling that possesses an improved combination of characteristics leading to a quick connect coupling that can be connected reliably, consistently, and with reduced damage to the coupling and low insertion force. The clip provides reduced friction against the fitting and reduces insertion force and damage. The clip has two end portions that are designed to be deflected relative to each other when the stem is inserted into the port. The clip further has a periphery with two end portions, each curved at or beyond the radius of maximum installation deflection such that they will not scrape the installation ramp.

Abstract: A threaded inline swivel has a first nut and an opposite second nut each having the form of a generally hollow cylinder with an open end to receive fuel. Each nut has a collar that has a common nominal diameter. A collar provides at least two faces for gripping by a wrench. Each nut has threading for connection to a hose or other fitting. To further seal the swivel to a hose or a fitting, at least one O-ring and at least one gasket are provided as alternative embodiments. In a further alternate embodiment, the swivel has a threaded second nut and an opposite barbed end on the first nut with a clip. The first nut has its chamber that constricts in diameter through a throat as it enters the second nut. The swivel in all embodiments provides for flow of fluid through it with little turbulence.

Abstract: A hydraulic fluid coupling for attaching two hydraulic hoses that comprises an inline swivel joint to prevent twisting of the hoses. The coupling comprises a first and second coupling portion, with the second coupling portion rotatable relative to the first coupling portion. There are two bearings and a ring shaped piston that slides toward the second bearing in response to fluid pressure inside the coupling. Engagement of the piston with the second bearing urges the second coupling portion towards the first coupling portion, against the action of fluid pressure between the first and second couplings. This reduces the load on the first bearing and transfers some of that load to the second bearing, thereby making it easier to rotate the second coupling portion.

Abstract: A connector for high amperage, AC or DC connection includes a plug and a receptacle configured to securely mate and lock with each other. Connector receptacles include a locking mechanism having a sleeve unit having a plurality of openings configured to receive a plurality of alignment members, a control unit in communication with the alignment members, and at least one extension member coupling the sleeve unit to the control unit. The control unit is configured to bias the alignment members to engage a groove in a plug in a locked position. Upon rotation of the control unit, the control unit engages the sleeve unit and allows the alignment members to freely move, thus allowing a user to connect or disconnect the plug from the receptacle.

Abstract: A quick coupling for a shaft includes a male coupling having a locking portion with a locking groove formed thereon. A female coupling includes a female body having an interior surface bounding a socket. A tapered port is formed on the female body and extending from the exterior surface to the interior surface thereof. The locking portion of the male coupling is received within the socket so that the tapered port is aligned with the locking groove. A ball bearing is disposed within the tapered port so that a portion of the ball bearing can project into the socket and into the locking groove. A locking sleeve is slidably mounted along the female body so as to cover and interact with the ball bearing.

Abstract: A tube connector that allows for a secure connection between a plug and a socket is provided. An accommodation space is provided such that, when the plug is inserted into an insertion hole of the socket while a sleeve is lifted upward to a base-end position, if a ball rolls on an outer periphery of the plug so as to come into abutment with a projection, the accommodation space entirely accommodates the ball at a side adjacent to the socket relative to the outer periphery of the plug.

Abstract: A short-body connector for fluid couplings made of a sleeve-shaped body. In the sleeve-shaped body an internal thread is provided, by which the connector can be screwed onto a threaded connection. Relative to axial extension, the locking groove and locking rib serving to hold the connector in the coupler are located at the height of the thread. That is, the locking rib and locking groove located ahead of the thread in the state of the art have moved to the region of the thread in the arrangement according to the invention.