Abstract: A control arm for the rear wheel suspension of a car where the control arm includes a cup-shaped spring mount with branches projecting from the spring seat. The branches may be designed as closed channels or U-shaped channels. In the upper part of the control arm there are flanges projecting from each side thereof. The flanges include a reinforced area around the spring seat. The cup-shaped spring seat is reinforces with wedges on the inside thereof. The spring seat and branches form a stiff frame structure. Also described is a method for manufacturing the control arm by forging.

Abstract: A ball joint for a wheel suspension in a vehicle is disclosed. The ball joint includes a bearing shell, a ball, and a housing. The ball is supported in the bearing shell, with the shell being subdivided by slots into lip elements. The slots are preferably arranged in the bearing shell from a middle part and up to an upper rim. The lip elements may be bent outwards at a compression groove to admit the ball when it is introduced into the shell.

Abstract: A square shaped sub-frame for a vehicle manufactured from an especially designed aluminium profile (1). The profile comprises a first and a second channel (11, 13) separated by an intervening channel (12). Said first and second channels (11, 13) are separated in localized areas by removing wall material from the intervening channel (12). Then, the profile (1) is bent into a U-shaped or square, closed frame, said second channel (13) defining a load carrying frame. The first channel (11) is machined into mounting brackets for control arms etc.

Abstract: The present invention involves a control arm for use in the wheel suspension of a car. The arm is produced from a hollow, closed profile of high strength, extruded aluminium. The arm is produced in a wholly cold process, similar to the one used to produce aluminium fenders, involving stretch-bending, pressing, cutting and punching of the aluminium profile into the desired shape. The arm has a closed and smooth shape; in addition, it has a rib on its outer surface for fending off water and snow.

Abstract: The present invention relates to a method for manufacturing shells, wherein a belt is attached to the outer surface of the shell by friction welding. The method is particularly favorable for welding bands to thin-walled shells. In the method, prior to the welding process, the shell is hardened and/or tempered for optimizing its properties during use and, after hardening and/or tempering, the shell receives the belt by friction welding, during which the temperature of the shell is kept at a level which does not reduce the qualities of the shell to a substantial degree.