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 method of resistive implant welding carbon fiber thermoplastic composites which includes providing at least two portions of a component formed with carbon fiber material, the at least two portions of the component each have a welding surface where the at least two portions of the component are welded together. One or more conductors of copper or aluminum mesh material positioned between the welding surface of the two portions. The method includes a forming tool having at least two portions capable of moving between an open position and a closed position. The forming tool has a welding region with non-conductive metal surface areas where electric current is selectively applied to facilitate the welding together of the at least two portions of the component. The forming tool has forming regions with conductive surfaces where the two components are shaped.

A method for coaxially connecting a first plastic tube (10, 110) to a second plastic tube (20, 120), said plastic tubes (10, 20) in particular being provided as part of a medical catheter (102), the two plastic tubes (10, 20) being connected by way of a tubular connecting piece (50), characterized in that the first plastic tube (10) and/or the second plastic tube (20) are integrally molded from the outside onto the tubular connecting piece (50) using a forming process such that an adhesive and/or positive connection is produced.

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 array of resilient floor tiles is assembled into a continuous sheet after being laid down. An array of included, sacrificial resistive wires is buried along the edges of the tiles and is controllably heated in order to cause welding of the edges of tiles across the paths of the wires to neighboring tiles. Subsequently the wires may be used to give the array integral tensile strength. The welded array is provided with greater strength for resisting use, expansive and contractile forces caused by environmental heat and cold and also long-term tile contraction owing to loss of plasticizer as may be seen with PVC-based tiles.

A device is provided for producing a bonded joint between fiber-reinforced thermoplastic parts to be joined, in which fiber-containing plastic material is mixed into the joining zone while friction stir welding the parts to be joined in the form of a butt joint.

A method for producing a rotor blade of a wind turbine includes the following steps: a) providing at least two different components of the rotor blade, b) placing a resistive element between the components, c) placing a thermoplastic or weldable thermoset resin between the components, d) energizing the resistive element so that the resistive element applies heat to the thermoplastic or weldable thermoset resin to melt or to soften it, and e) joining the components together by means of the molten or softened thermoplastic or weldable thermoset resin.

Composite radius fillers and assemblies comprising composite radius fillers are disclosed. An example of a composite radius filler comprises a body having a longitudinal axis. The body comprises a main-portion and an end-portion. The main-portion extends along the longitudinal axis and has a first stiffness. The body further comprises an end-portion that extends along the longitudinal axis, that is adjacent to the main-portion, that defines at least a portion of a terminal end of the body, and that has a second stiffness that differs from the first stiffness. At least a first portion of an interface between the main-portion and the end-portion is at an angle relative to the longitudinal axis. Methods for a composite manufacturing method comprise constructing a composite radius filler. Aircraft assemblies comprising a composite radius filler are further disclosed.

A method comprises pressing a tool into a main-portion of a composite radius filler. Another method comprises changing a shape of at least a first main-portion surface of a main-portion of a composite radius filler by pressing a first tool surface of a tool into the first main-portion surface. A system comprises a tool and a composite radius filler comprising a body having a longitudinal axis. The body comprises a main-portion and an end-portion. The main-portion extends along the longitudinal axis and has a first stiffness. The body further comprises an end-portion that extends along the longitudinal axis, that is adjacent to the main-portion, and that has a second stiffness that differs from the first stiffness. At least a first portion of an interface between the main-portion and the end-portion is at an angle relative to the longitudinal axis.

In a first aspect, a method for joining a first composite element and a second composite element of a wind turbine blade is provided. The method comprises positioning one edge joining portion of the first composite element to face one edge joining portion of the second composite element. In addition, the method comprises plastic welding the one edge joining portion of the first composite element to the one edge joining portion of the second composite element. In a further aspect, a wind turbine blade comprising a first composite element joined to a second composite element according to any of the methods herein disclosed is provided.