A coupling may be configured to receive and secure an insertion end of a conduit. An outer surface of the insertion end of the conduit may be smooth and free of grooves, flanges and beads. A first member of the coupling may define a first passageway. A second member of the coupling may define a second passageway. The first member may be in spin weld engagement with the second member. A gripping ring having an inner edge defining a series of teeth may be disposed within the second member. A support ring and O-ring may also be disposed within the second member.

A temperature-adjustable plastic water pipe connecting structure includes two vertical pipes and a horizontal pipe. The vertical pipe has a first threaded portion formed on a top portion of the vertical pipe, a second threaded portion formed on a bottom portion of the vertical pipe, and a bump formed on a peripheral wall of the pipe and having an outlet. The horizontal pipe has two ends and a connecting seat mounted on the horizontal pipe. The two ends are respectively mounted into the outlets of the two vertical pipes. The present invention has the advantages of a simplified connecting structure facilitating assembly of the temperature-adjustable plastic water pipe, significantly reducing the parts of the temperature-adjustable plastic water pipe and cost in production, and simplifying the manufacture.

A fitting (1) of weldable, thermoplastic material of a modular structure, comprising a number of elements (2, 3, 9, 10, 11, 12), at least one main element (2, 9) and at least one connecting element (3, 10, 11, 12), characterized in that the elements (2, 3, 9, 10, 11, 12) have end faces (4, 5) at right angles to the center axis (8), and the elements (2, 3, 9, 10, 11, 12) are welded to one another exclusively at the end faces (4, 5).

A synthetic resin-made welding joint that has a pipe end portion into which an end portion of a synthetic resin-made tube is to be fitted and inserted, and that is configured so that the pipe end portion and the tube end portion which is fitted and inserted thereinto are enabled to be welded together by heating of heating means which externally surrounds the pipe end portion, therefore, a synthetic resin-made holder which is fitted and attached onto the pipe end portion is disposed, and a flange for ensuring a radial expansion gap with respect to the heating means is integrally formed in the holder.

A snap fitting for use in plumbing is provided. The snap fitting includes a main body formed of plastic and shaped to extend partially around a cylindrical pipe to snap over the pipe and an inset for extending from an interior side of the main body into a hole in the cylindrical pipe.

A device (1) for automated connection of two components (25, 27) in joint region (29) is proposed. The device (1) has a rotating winding device, especially a circle-segment-like rotor (3), which is arranged to guide a cloth tape (23) along winding paths (26) and to create a wound joint connection in the joint region (29).

A device for a leakproof air-conditioning fluid circuit. A body includes a conduit having a foot at its base, coupled to a communication orifice in the periphery of a tube. A welding is made between an interior part of the base of the foot and a corresponding part of a tube having an orifice. An internal semi-cylindrical a portion of the base of the foot features, around the discharging conduit, a part in the shape of a skirt, formed by two straight or curved segments which together define a semi-cylindrical cradle in the interior wall of the tube. An orifice comprising a whistle-shaped notch in the back of the tube, comprises two complementary segments.

A coupling may be configured to receive and secure an insertion end of a conduit. An outer surface of the insertion end of the conduit may be smooth and free of grooves, flanges and beads. A first member of the coupling may define a first passageway. A second member of the coupling may define a second passageway. The first member may be in spin weld engagement with the second member. A gripping ring having an inner edge defining a series of teeth may be disposed within the second member. A support ring and O-ring may also be disposed within the second member.

An electrofusion saddle comprising: a thermoplastic body comprising a flange and optionally a spigot which erects from said flange; and a resistance heating coil including multiple windings, wherein said resistance heating coil is partially embedded in said flange and is partially protruding from said flange, wherein the protrusion is of at least 25% of an average external diameter of said multiple windings.

A method of heat welding a length of pipe with a coupling is disclosed. The coupling and the length of pipe are of a thermoplastic material. The method includes preparing a first end of the length of pipe; preparing a first groove of the coupling, wherein the first groove is configured to mechanically interface to an inner diameter (ID) and outer diameter (OD) of the length of pipe; heating the first and the first groove to a weldable temperature; joining the first end to the first groove; and permitting the first end and the first groove to cool sufficiently long to form a thermoplastic weld.