Abstract: Known designs of disk coolers for motor vehicles have flow guides intended to achieve optimum through flow in the hollow chambers formed in the disk coolers. It has been found that the through flow is nevertheless not optimal. Accordingly, it is proposed, at least in the hollow chambers through which the oil flows, to block off the inlet and outlet openings located in the vicinity of a cental return opening respectively by partitions that form flow pockets that serve to force the medium flowing at the periphery of the respective hollow chambers to pass through the entire cross sections of the chambers. This improved construction is suitable for use for disk oil coolers of motor vehicle engines.

Abstract: An installation of a pressure control valve provided for cold start in disk-type oil coolers is disclosed. The valve is provided with a valve housing which can be fitted directly into a connection opening between an inlet chamber and a hollow space through which the oil flows. The valve housing is utilized to accommodate a pressure spring which is arranged coaxially and acts upon the valve shutter. The valve housing is provided in the area of the connection opening with at least one desired buckling point such that, when the end of the valve housing impacts on a resistance, the wall of the valve housing will permanently deform to the outside and secure the valve in the connection opening.

Abstract: Known disk oil coolers, when they are to be used without an oil filter, are provided with a separate housing cover which, by means of a sealing device, is disposed on a ring surface of the housing and is held on the housing by way of a hollow screw. These constructions require a large amount of space. It is disclosed to provide the hollow screw, on the side of the driving surfaces for a screwing tool directed toward the housing, with an end disk which is provided with a sealing surface resting against an annular wall of the housing. On the side of the end disk facing the housing, an opening is provided which leads into the interior of the hollow screw. This hollow screw may be used instead of the hollow screw to be provided for the use with the filter. Elaborate modifications or other housings are not required.

Abstract: Known disk oil coolers, which are surrounded by a plastic covering, require high expenditures during manufacturing because the sealing-off with respect to the front-side connections of the covering must take place by soldering. A pot-shaped housing is disclosed with a lid made of plastic which is welded together and into which, on both sides, sealing devices are fitted for the sealing-off of the stack of disks, in which case the design is such that, after the welding-together, the sealing devices are each prestressed.

Abstract: Soldered disk oil coolers are made using two disk plate which are stacked on one another for forming a hollow body, and are connected by soldering their outer edges. The individual disk bodies are constructed of two plates of a circular or elliptic shape in such a manner that their edges overlap one another and are in this case adapted to one another such that the outer edge is lockingly and under tension held at the inner edge of the other plate.