Heat exchanger

Claim 1

A HEAT EXCHANGE DEVICE COMPRISING: (A) A SUBSTANTIALLY FLAT, SEAMLESS, INTEGRAL SHEET METAL STRUCTURE HAVING (1) A PLURALITY OF PARALLEL ELONGATE SPACED APART SHEET ELEMENTS LYING IN A COMMON PLANE, (2) AN ELONGATE SHEET ELEMENT FORMED INTEGRALLY WITH SAID PLURALITY OF SHEET ELEMENTS ALONG ADJACENT ENDS THEREOF, SAID LATER SHEET ELEMENT LYING IN SAID COMMON PLANE AND EXTENDING IN A DIRECTION TRANSVERSE TO THAT OF SAID PLURALITY OF SHEET ELEMENTS, (B) AT LEAST ONE TUBULAR PASSAGEWAY INTERNALLY DISPOSED WITHIN SAID STRUCTURE AND TRAVERSING SAID STRUCTURE IN A SINUOUS PATTERN OVER ALL SAID SHEET ELEMENTS, (1) SAID PASSAGEWAY BEING DEFINED BY OPPOSED PORTIONS OF THE THICKNESS OF SAID STRUCTURE BULGED OUT OF THE PLANES OF OPPOSING SURFACES OF SAID STRUCTURE OVER SAID SINUOUS PATTERN THEREBY FORMING OPPOSED SPACED APART WALLS, (2) SAID PASSAGEWAY HAVING OPEN TERMINAL PORTIONS, AND (C) A PLURALITY OF HEAT DISSIPATING FINS MOUNTED ON SAID STRUCTURE IN PARALLEL SPACED APART RELATIONSHIP AND IN INTIMATE CONTACT WITH SAID SPACED APART WALLS OF SAID PASSAGEWAY, (1) SAID FINS EXTENDING TRANSVERSELY ACROSS SAID PLURALITY OF SHEET ELEMENTS FOR SUBSTANTIALLY THE FULL WIDTH THEREOF AND LYING IN PLANES DISPOSED SUBSTANTIALLY PERPENDICULARLY TO SAID COMMON PLANE, (2) EACH SAID FIN HAVING A PLURALITY OF SLOTS FORMED THEREIN AND SPACED APART IN CORRESPONDENCE TO SAID SPACED APART SHEET ELEMENTS, SAID SLOTS BEING AT LEAST EQUAL IN LENGTH TO THE WIDTH OF ONE OF SAID PLURALITY OF SHEET ELEMENTS BUT BEING GREATER IN WIDTH THAN THE UNEXPANDED THICKNESS OF SAID PLURALITY OF SHEET ELEMENTS, (3) EACH SAID FIN FURTHER HAVING MEANS FORMED INTEGRALLY THEREWITH ADJACENT OPPOSITE LONGITUDINAL EDGES OF SAID SLOTS AND OPERATIVELY ASSOCIATED WITH SAID SPACED APARTS WALL FOR APPLYING SUBSTANTIALLY EQUAL AND OPPOSITE MOMENTS TO SAID FIN WHEREBY SAID FIN REMAINS ERECT AND SUBSTANTIALLY PERPENDICULAR TO SAID COMMON PLANE.