A fluid transport coupling subcomponent can include a body having a first axial end with a first axial face, a second axial end, and a hollow conduit extending between the first and second axial ends, a tongue extending longitudinally from the first axial face; and a groove recessed into the first axial face. The tongue can extend a distance, D.sub.T1, from the first axial face and the groove can extend a distance, D.sub.G1, into the body from the planar face, where D.sub.G1 and D.sub.T1 can be different.

A conduit coupling adapter for securing attaching a conduit to an enclosure. The conduit coupling adapter generally includes a first end for receiving a conduit and attaching to it via an adhesive, and a second end coupled to the second end comprises threads and is configured for attaching to an enclosure using a locknut.

The invention relates to a pipe, in particular a plastic pipe for wastewater lines, which has at least one socket end which is provided with an annular bead (4) and a socket neck (3) and forms a first pipe (1) into the socket end of which the spigot end of a second pipe or shaped part (13) can be plugged and removed again therefrom, and in which an elastic annular seal (6) is inserted into the annular bead (4). According to the invention, the socket neck (3) of the pipe is provided with a screw thread (9) onto which there can be screwed a screw ring (8) which comprises an inner ring part (10) and an outer ring part (11) between which an annular gap is formed, and the ring parts (10, 11) are connected by means of a ring base (12) facing away from the annular bead (4), wherein, upon screwing the screw ring (8) onto the screw thread (9), the front edge (14) of the inner ring part (10) compresses the annular seal (6) inserted into the annular bead (4) and arrests the spigot end of the second pipe or shaped part (13) in the first pipe (1).

A quick disconnect coupling for connecting a tube to another structure, such as a structure defining a port. The quick disconnect coupling may include a tube including a retention shoulder, a swivel rotatably disposed on the tube, and an adapter defining a bore for receiving a portion of the tube. The swivel may be engageable with the adapter to trap the retention shoulder between the swivel and the adapter. The adapter may be engageable with a receiving structure defining a port and the port may be in fluid communication with a lumen of the tube when the swivel is engaged with the adapter.

A pipe-fitting includes a plurality of pipe receiving portions, a hollow joint for connecting the plurality of pipe receiving portions to each other, a sealing member received in a sealing member-receiving groove, and a plurality of hollow fixing-caps, wherein each fixing-cap is screwed to a distal end of each pipe receiving portion to press the sealing member to be brought into close contact with each pipe. A fixing-cap stopper is formed on an outer circumferential face of each pipe receiving portion. The fixing-cap stopper includes a fixing-cap fixing portion including a plurality of fixing protrusions protruding toward a proximal end of the fixing-cap. A plurality of fixing-protrusion-receiving grooves is defined in the proximal end of each fixing-cap for receiving the fixing-protrusions therein respectively.

An anti-rotation device for preventing a hydraulic connector assembly from leaking. Various embodiments of the anti-rotation device provide a mechanism whereby threadably engaged connectors, such as compression fittings, are permitted to rotate only a fraction of a turn after loosening. For many applications, the limited degree of loosening is sufficient to prevent the onset of leaking. Structurally, the anti-rotation device can include a band that is secured to a female nut of a hydraulic connector. Protrusions extend laterally from the band and engage with a stop tab on the male body of the hydraulic connector assembly, thereby limiting rotation of the female nut that would otherwise cause leaks. Locking provided by zip tie structures proximate the free ends of the anti-rotation device.

A chemical delivery system connects to a chemical tank and includes a union connected to the tank outlet and providing an antirotation feature, in addition to threads, to prevent rotation of the assembly in response to asymmetric loads. A measuring tube alternately receives liquid from the tank and is isolated from the tank. While isolated from the tank, liquid is withdrawn from the tube by a pump under conditions allowing the pump to be calibrated. The assembly is cantilevered from the tank outlet and is of reduced length and weight producing a device which is not prone to overstress the tank outlet.

An apparatus for coupling together tubular components is described herein. The apparatus includes a coupling assembly with a coupling device having threads and an internal groove. The coupling assembly also includes a retainer clip positionable in the internal groove. The retainer clip is biased to apply a radially outward force against the internal groove when the retainer clip is positioned in the internal groove. The coupling assembly includes a ferrule, coupleable to the coupling device, in contact with the retainer clip when coupled to the coupling device to form an electrically conductive path through the coupling device, the retainer clip, and the ferrule. The retainer clip is configured to prevent movement of the coupling device relative to the ferrule when the retainer clip has an unbiased inner diameter smaller than an outer diameter of the ferrule or the retainer clip is not properly inserted into the internal groove.

Disclosed is a structure for preventing a leak at a synthetic resin tube joint, which includes a synthetic resin tube including a tapered portion at an end portion; a ferrule inserted into the end portion of the synthetic resin tube and including a tapered portion corresponding to the tapered portion of the synthetic resin tube; a fitting which accommodates the synthetic resin tube and the ferrule, and includes a tapered portion corresponding to the tapered portion of the synthetic resin tube and a protrusion formed on the tapered portion of the fitting, and a nut which engages with the fitting.

A connector has a cylindrical sleeve device having a first part, with an external screwthread on its outer side, and a second part, with an internal screwthread on its inner side. One of the screwthreads engages a corresponding screwthread on a further part when the device is in use. At least a portion of the said second part is yieldable. A locking part is provided with a screwthread which engages the other of the screwthreads of the cylindrical sleeve device when the connector is in use. The second part and the locking part have mutually engageable portions which, when the locking part is tightened relative to the cylindrical sleeve device, interengage to cause yielding of the second part or yieldable portion thereof. This effects locking of the cylindrical sleeve device with respect to such a further part when the connector is in use.