Abstract: An improved heat exchanger having a pair of headers and at least one tube extending between and fluidly connecting the headers. A tubular structure for and defining in part each of the headers. The tubular structure being defined by a pair of body elements and having opposed longitudinal joints defined by overlapping portions of the body elements. One of the body elements overlaps the other of the body elements to define one of the joints and is overlapped by the other of the body elements to define the other of the joints.

Abstract: A method for constructing a heat exchanger having a pair of headers and a plurality of tubes extending between and fluidly connecting the headers is described. For each header, a pair of body elements is provided each formed of brazing clad material. A tubular assembly is formed of brazing clad material for each tube. The tubular assembly, for each tube, is fitted into apertures. The body elements and the tubular assemblies are brazed together to form the heat exchanger.

Abstract: A method for constructing a heat exchanger having a pair of headers and a plurality of tubes extending between and fluidly connecting the headers is described. For each header, a pair of body elements is provided each formed of brazing clad material. A tubular assembly is formed of brazing clad material for each tube. The tubular assembly, for each tube, is fitted into apertures. The body elements and the tubular assemblies are brazed together to form the heat exchanger.

Abstract: A heat exchanger for heat exchange between two liquids comprises a core comprised of formed plates connected to one another in a stack, these plates including first and second end plates and intermediate plates. Each of the plates has a central section and the first end plate and the intermediate plates each have an edge wall extending outwardly from its respective central section at an angle. The core has inlet and outlet holes in the main plate sections. The plates are in sealed engagement with one another and the central sections of at least the first end plate and the intermediate plates are spaced apart from respective adjacent central sections to form liquid flow passages. The second end plate is formed with an integral ridge extending snugly along the edge wall of the adjacent plate. This ridge is spaced from the edge of the end plate so as to provide one or more mounting flanges.

Abstract: An improved heat exchanger is disclosed. The heat exchanger is of the type including a pair of headers and a plurality of tubes extending between and fluidly connecting the headers. The improvement comprises a tubular structure for and defining in part each of said headers. The tubular structure is defined by a pair of body elements and has opposed longitudinal joints defined by overlapping portions of the body elements. One of the body elements overlaps the other of the body elements to define one of the joints and is overlapped by the other of the body elements to define the other of the joints.

Abstract: A corrugated fin or turbulizer for a heat exchanger comprises a series of corrugations with parallel side walls. The side walls are provided with a series of parallel slits between which one-sided or two-sided louvers are defined. Each of the louvers has first and second edges extending along an adjacent pair of slits, and at least one bend located between the edges, thereby causing at least one of the edges of the louver to project outwardly of the plane of the side wall, and providing the side wall with improved crush resistance. The corrugations may preferably be rectangular or trapezoidal in form, having generally flat top and bottom surfaces defined by two closely-spaced bends. The top and bottom surfaces may preferably be provided with protrusions, at least some of which extend close to the bends. This assists in creating localized areas of weakness along which the bends can be formed cleanly.

Abstract: A heat exchanger has a pair of heat exchange conduits having adjacent primary heat exchange surfaces thermally coupled together for the transfer of heat energy between the conduits. A third fluid conduit has a primary heat transfer surface thermally coupled to the primary heat transfer surfaces of the pair of fluid conduits, so that heat can be transferred between any one of the fluid conduits and each of the other fluid conduits.

Abstract: A valve that includes a housing defining first and second bores having a central axis, and a peripheral valve seat. An actuator is located in the first bore and has a reciprocating seal disposed for movement along the central axis for engaging the valve seat and closing the valve. A coiled return spring is mounted in the housing for urging the reciprocating seal towards the chamber to open the valve, the return spring having a first end connected to the reciprocating seal and a second end engaging a spring support in the housing facing the first bore. The return spring may have a larger diameter at its second end than its first end. The housing may include a third bore in communication with the second bore and having a different cross-sectional area than the second bore. A closure cap formed from moldable material may close an opening in the housing, the closure cap being sealably joined to the housing by a welded joint.

Abstract: A brazing product for low temperature fluxless brazing comprises a filler metal-forming composition which melts in the range from about 380-575° C. The filler metal-forming composition comprises zinc optionally in combination with aluminum and/or silicon, and further comprises at least one braze promoter selected from nickel, cobalt, iron and palladium. The filler metal-forming composition may comprise a single layer or may comprise a number of distinct layers. The brazing product may take the form of a brazing preform or a brazing sheet or casting in which the filler metal-forming composition is deposited on a non-consumable substrate. The substrate may preferably comprise aluminum or an aluminum alloy, but may instead be comprised of one or more metals other than aluminum.

Abstract: A mounting bracket is shown for a heat exchanger core having spaced-apart tubes having peripheral flanges surrounding a manifold. The mounting bracket has a first clip grooved to receive a front edge portion of a selected flange, and a pair of second clips, each grooved to receive, respectively, the back edge portion of an other flange disposed above the selected flange, and a further flange disposed below the selected flange. The clips are joined together by a panel portion adapted for the mounting of the heat exchanger. The clips are tapered to distribute bending stresses therealong.