Abstract: A manifold for a heat exchanger comprising a tank, a plurality of tubes arranged to receive fluid therein, a plurality of fins for interspacing the tubes, the fins extending along the length of the tubes to thereby define a core section, wherein the header section is formed with multi-point brazing interfaces for securing said header and said core section during a brazing process. One embodiment provides at least one doubled wall area in close proximity to the tube slot areas to form a structure of increased strength, permitting the material to be reduced in relative thickness. The manifold may be formed from flat sheet stock by extended side walls of the header portion joined by a separate cap to close a top portion of the manifold assembly for the purpose of collecting fluid to and from the tubes and said at least one inlet and outlet.

Abstract: A variable speed drive assembly for driving an auxiliary member in an internal combustion engine. The auxiliary member may be a fan connected to a pulley is driven by a drive pulley connected to a crankshaft of the internal combustion engine via a V-belt. At least one of the pulleys is an adjustable drive ratio pulley. An actuator is operatively connected to the drive assembly to controllable change the drive ratio of the pulley. By controlling the drive ratio of the pulley, the speed of the fan can be selectively controlled. The adjustable drive ratio pulley may have an inner idler freely rotatable mounted therein. The actuator may cause the V-belt to engage the inner idler to substantially disconnect a rotatable connection between the fan and the crankshaft thus allowing the fan to windmill.

Abstract: A fan module with an axial flow fan and a shroud member. The axial flow fan has a hub and a plurality of fan blades, each blade extending radially from the hub. At the tips of the blades are air guide members secured to respective fan blades and concentric with the hub. Each air guide member has an axially-extending arcuate portion, and a respective lip portion extending radially outwardly from each said arcuate portion. The axially-extending portion has an axial length substantially equal to or less than the axial length of said hub. The shroud member has a surface cooperating with the air guide members in an arrangement to reduce tip vortices.

Abstract: A novel tube plug which may be used to plug selected tubes in a heat exchanger has a cap portion for substantially closing a heat exchanger tube and a tube engaging portion depending from the cap portion, for insertion into the tube to retain the tube plug. By applying solder to the tube plug, the tube is sealed off, without providing a large solder mass which could cause damage due to thermal stresses.

Abstract: A tank part for a heat exchanger manifold of the type comprising separate tank a header parts joined to form a tubular manifold comprises an elongate channel-shaped member (18) and at least one partition member (6,8) fitted transversely therein, wherein the tank part is provided with inwardly protruding deformed regions on opposite sides of the or each partition to hold this in position, which comprise inwardly protruding dimples (24), and/or tabs (40,42) bent from portions upstanding from edge regions of the tank part.

Abstract: A two-part bracket to be secured to a cylindrical object such as a header tank for a condenser, e.g. for an automobile air conditioning system, comprises two parts each having a concave portion and a flange portion and interengaging formations such as matching tongues and grooves arranged so that the two parts can be assembled with their concave portions together embracing an arc of more than 180.degree. around a portion of the cylindrical object and with their flange portions lying against one another so as to resist opening of the region embraced by the concave portions, so that the assembled bracket can be slid on to the cylindrical object from one end and will be held thereon in a desired position by friction while the bracket is welded or brazed to the cylindrical object.

Abstract: A tubular element for a heat-exchanger comprises a tubular core composed of a first aluminum alloy comprising up to 0.3 wt % maximum of silicon, up to 0.5 wt % maximum of iron, from 0.50 to 0.70 wt % of copper, from 0.65 to 1.0 wt % of manganese, from 0.1 to 0.30 wt % of magnesium, up to 0.05 wt % maximum of zinc, from 0.08 to 0.10 wt % of titanium, and the balance aluminum and unavoidable impurities; an inner layer of a second aluminum alloy on the tubular core; and an outer brazable layer of a third aluminum alloy on the tubular core. The tubular core and the inner layer may be selected to have a corrosion potential difference of from 170 to 200 mV verses a saturated calomel electrode. The tubular core may have a grain size falling within the range about ASTM 5 to about ASTM 6 and the grains having a morphology which is elongated in the axial direction of the tubular core.

Abstract: A heat exchanger manifold comprises a tubular manifold, and a plurality of heat exchange tubes connected thereto, the manifold comprising a header part in the form of an elongate member defining a plurality of apertures therein, into which end portions of heat exchanger tubes extend, and a tank part comprising an elongate member which is non-unitarily formed with said header part, and defines a tubular housing with said header part and is joined thereto at longtiduinal engagement surfaces, the said manifold further comprising a plurality of plate-shaped baffles, and an elongate locating rail fitted within said housing and supporting said baffles transversely in said tubular housing.