Method of making a heat exchanger

Details Method of making a heat exchanger Method of making a heat exchanger

1979-02-15

1981-03-31

Mehr, Milton S.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573A, 291574, 113118A, 228183, 285223, B23P 1526

Patent

active

042584604

ABSTRACT:
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 fins for defining a fluid circuit, the assembly including at least one tube-to-tube joint, the improvement comprising 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 portion for receiving the outwardly tapered portion of the other tube end and an inwardly directed flange clinched over the shoulder of the other tube end to produce a solderless mechanical connection between the two tubes.

REFERENCES:
patent: 368611 (1887-08-01), Pratt
patent: 1102163 (1914-06-01), Opperud
patent: 3415315 (1968-12-01), Donaldson et al.
patent: 3833986 (1974-09-01), De Cicco

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