Tube joint for use with multi-walled tube assembly

摘要

A tube joint for connecting a multi-walled tube assembly, typically a double-walled tube assembly, including a plurality of tubes defining a plurality of fluid passages to an object includes a joint body having a hole for inserting the tube assembly therein and as many passages as the number of the fluid passages. A tube connector mechanism is provided for engaging the tube assembly. A coupling has a rod for be ing fitted into the tube assembly and a passage for communicating the tube assembly with one of the passages of the joint body. The rod has on a distal end thereof a substantially spherical projection projecting radially outwardly for being fitted in an inner surface of the tube assembly to connect the tube assembly to the coupling. The inner surface of the tube assembly and the rod are slidable with respect to each other to prevent damage to the tube assembly when it is connected to and disconnected from the tube joint.