The medial conduit (88) sheathes on the inner conduit (51) and can slide along the inner conduit (51).

An inner conduit coupling (22) connects the first inner conduit (10) to the second inner conduit (16).

A first outer conduit (12) surrounds the first inner conduit (10).

A second outer conduit (18) surrounding the second inner conduit (16).

A fuel bundle chamber may be between an inner surface of the outer conduit and an outer surface of the inner conduit and may at least partially laterally surround the inner conduit.

The orifice and the inlet are connected to the internal duct.

The support structure has an internal cooling duct having a duct wall.

A coupling assembly for fuel transfer includes a first inner conduit (10) and a second inner conduit (16).

A catheter including an outer conduit and an inner conduit movably disposed therein.

Fuel is delived to the burner head through a first conduit (3) placed within the inner pipe, and air of combustion is delivered through the inner pipe.

The inside pipe (20) has supply port (18) through supply pipe (6).

The structure of the blood seal includes a housing with an internal channel.

The distal tip of the inner conduit extends beyond the distal tip of the outer conduit.

First and a second conduit segment have at least one inner conduit surface and an outer conduit surface.

Space in a conduit having at least one cable therein which is surrounded by a duct is recovered by longitudinally cutting the duct and removing the duct from around the cable.