Abstract: A radiator comprising a number of parallel cooling medium pipes having fin stacks secured thereto in which a metal strip of the desired width dimensions is zigzag folded to form a stack having successive fin parts and side parts, each fin part being divided into stepwise parallel portions by additional fold areas parallel to the side parts.

Abstract: In a cross finned tube heat exchanger including a multiplicity of side-by-side fin plates, and a plurality of heat transfer tubes extending through the fin plates at least in one row to provide a serpentine flow passage for a heat transfer medium which exchanges heat with another heat transfer medium flowing across the surfaces of the fin plates, a multiplicity of stepped louvers are formed on the wall of each fin plate between the adjacent heat transfer tubes of the same row. The stepped louvers each extending in a direction at right angles to the direction of air flow across the surfaces of the fin plates include at least one tilting rise wall and may differ from one another in shape depending on their positions. The stepped louvers on each fin plate may be arranged in the form of waves or uniform in height with respect to the direction in which each fin plate extends. The adjacent stepped louvers have edges varying in vertical positions.

Abstract: A heat exchanger assembly and the method of making same wherein the heat exchanger assembly includes a heat exchanging core having spaced headsheets adjacent opposite extremities with fluid conveying tubes extending between the headsheets and having heat transfer fins disposed upon the tubes. Two plastic radiator components are disposed in mating engagement with one another with each component encasing one-half of the core and disposed in mating engagement with one another and defining spaced open cavities. Each of the components is in fluid-tight or sealed relationship with one another and with each of the headsheets disposed within the opening of each of the cavities so that the cavities and the headsheets define a pair of spaced tanks whereby fluid may flow between the tanks through the heat exchanging core. The headsheets are disposed in grooves within the components with a seal engaging the periphery of the headsheets and disposed in the grooves for sealing the headsheets to the respective components.

Abstract: A solar collector device generally comprises two laterally spaced apart frame arms with sockets located therein for the reception and support of solar collector pipes transversely extending therebetween. Within each frame arm, selected pairs of sockets are placed in fluid communication by means of intersecting ducts, each duct respectively emanating from a socket of each socket pair. This socket/duct network achieves a serial back-and-forth flow, relative to the frame arms, of solar collector fluid throughout the collector pipes from the point of fluid intake to the point of fluid discharge. Located underneath the collector pipe array is a reflective surface having upwardly directed channels, each collector pipe lying within each channel along its transverse span. The channel sides are angularly positioned so as to provide maximum solar ray reflectance and attendant absorption by the collector fluid throughout its serial flow.

Abstract: A heat exchanger plate of single unitary structure and relatively thin material has a deep draw formed through one surface adjacent to each of the opposite ends to provide fluid openings and a lesser depth inner draw formed in the other surface to provide a fluid passage communicating with the fluid openings. The plate is adapted to oppose adjacent plates in a stacked configuration to provide heat transfer between separate fluids flowing through counterflow passages on opposite sides of the plate. The recessed area on one surface of the plate forms a fluid passage with its adjacent plate in the stacked array for flow of a first fluid through the stack from side to side of an enclosing housing. A collar formed around each plate opening by the deep draw is adapted to nest with a corresponding collar of an adjacent plate to provide manifold sections communicating with a second fluid passage.

Abstract: A series of mesh layers, approximating a loosely woven cloth, are placed between successive adjacent, parallel tubular coils or bends through which a liquid flows. The assembly of coils and mesh layers is compressed to produce a clamping contact between the mesh and each of two opposed coils, as well as compressing the mesh together, both within and outside the areas of the coils. The mesh which intersects an end of the coil is split, so that the mesh may lie on both sides of the coil at that position. A perforated plate may be placed at each end of the mesh and coil assembly, with a screen interposed, in order to maintain the mesh and coils in a clamped condition. The perforated plates may be spot welded to the inside of a housing, the parts of which are also compressed against the mesh and coil assembly. The compression of the mesh against the coils not only provides a greater area of contact of the fibers, strands, wires, etc., of the mesh, but also produces a clamping or pressure contact.

Abstract: A heat exchanger assembly comprising a stacked array of thin-walled heat exchange channel elements, having first fluid entrance and exit faces at opposite ends of the array. The improved headering arrangement includes a resilient gasket disposed around the perimeter of each face against the wall portion ends thereof and header tank means enclosing each face of the array, arranged to bear compressively against the resilient gasket and form a fluid-tight seal between the header tank and the stacked array.

Abstract: A method and apparatus for rolling metal ribbon stock into convoluted fin strip for use in heat exchangers is disclosed. The passageways defined by adjacent convolutions may be of zig-zag shape in a direction transversely of the strip by reason of the fact that the form rolls are designed such that the return bent portions connecting successive convolutions are initially formed as two symmetrical half sections separated by a sharp bend line extending transversely along the centerline thereof. After the strip emerges from between the form rolls it is gathered or compressed lengthwise in a conventional manner so that further bending of the convolutions is localized along said sharp straight bend lines.

Abstract: Radiator comprising tubes, tube plates fitting ends of said tubes, lateral flanges and corrugated fins inserted between the tubes and between the tubes and the flanges. A bearing area is designed along the flanges or the tubes close to the tube plate for applying end fins between the flange and the adjacent tube. Means are designed for at least limiting joining portions of said fins extending at the level of said area.