Oil cooling heat exchange unit

Claim 1

A HEAT TRANSFER UNIT COMPRISING A PAIR OF ELONGATED PARALLEL, VERTICALLY SPACED HEADERS HAVING ARCUATE SLOTS FORMED THEREIN IN VERTICALLY ALIGNED AND FACING RELATION TO ONE ANOTHER, AND A HOLLOW VERTICALLY EXTENDING HEAT TRANSFER MEMBER OF SUBSTANTIAL HEIGHT AND HORIZONTAL BREADTH DISPOSED BETWEEN SAID HEADERS AND IN COMMUNICATION WITH SAID RESPECTIVE SLOTS AT UPPER AND LOWER ENDS OF THE TRANSFER MEMBER, SAID TRANSFER MEMBER COMPRISING A PAIR OF SHEET METAL PLATES MARGINALLY SEALED TO ONE ANOTHER AND SPECIALLY SHAPED TO PROVIDE GENERALLY PARALLEL, UPRIGHT LIQUID FLOW CONTAINING WALLS, SAID WALLS BEING FORMED TO PROVIDE AT LEAST ONE LIQUID FLOW ZONE HORIZONTALLY OF THE TRANSFER MEMBER AND INTERMEDIATE THE TOP AND BOTTOM OF THE LATTER WHICH IS PROVIDED WITH CORRUGATIONS EXTENDING TOWARD THE RESPECTIVE HEADERS, SAID PLATE WALLS HAVING A PREDETERMINED MINIMUM SPACING FROM ONE ANOTHER AT SAID ZONE, SAID WALLS ABOVE AND BELOW SAID ZONE BEING IN A RELATIVELY WIDE SPACING FROM ONE ANOTHER SUBSTANTIALLY EXCEEDING SAID MINIMUM SPACING THEREOF AT SAID CORRUGATED ZONE TO PROVIDE MANIFOLD THROATS SUBSTANTIALLY COEXTENSIVE IN HORIZONTAL BREADTH WITH AT LEAST A MAJOR PART OF THE BREADTH OF THE TRANSFER MEMBER AND OF SUBSTANTIAL HEIGHT ABOVE AND BELOW SAID CORRUGATED ZONE AND COMMUNICATING VERTICALLY WITH THE LATTER, SAID PLATE WALLS BEING FORMED ABOVE AND BELOW THE RESPECTIVE THROATS IN A GREATER SPACING FROM ONE ANOTHER THAN AT SAID THROATS TO PROVIDE RELATIVELY WIDE MOUTHS OF LESS HORIZONTAL BREADTH THAN THE THROATS, WHICH MOUTHS SPAN THE SLOTS OF THE RESPECTIVE HEADERS TO COMMUNICATE SAID TRANSFER MEMBER WITH SAID HEADERS, THE TRANSFER MEMBER BEING CONNECTED TO SAID HEADERS ADJACENT THE RESPECTIVE MOUTHS.