Heat exchanger assembly and method

Abstract From the Canadian patent

A heat exchanger assembly of the type having a heat transfer core element which includes a plurality of fins in parallel stacked relationship for defining heat transfer surfaces and a plurality of fluid carrying tubes extending transversely through the fines for defining a fluid circuit the assembly in-, cluding at least one tube-to-tube joint the improvement com-, prising a solderless connection at the tube-to-tube joint wherein one of the tubes includes an end having an annular outwardly, extending shoulder followed by an inwardly tapered flared portion for receiving the outwardly tapered portion of the other portion and the other of the tubes including an end having an outwardly flared …