Abstract: A dual clutch arrangement for a transmission that is provided with a first input shaft and a second input shaft has a clutch housing that is connectable to a drive train in a rotationally fixed fashion. The first and second friction clutches can transmit a torque between the clutch housing and the first and the second input shafts, respectively. The first and second friction clutches are nested in the radial direction with respect to each other and actuated by a first and a second actuating unit that have pistons for pressuring clutch disk packs. The compressive force exerted by the piston of the first actuating unit and the compressive force exerted by the piston of the second actuating unit are directed in axially opposite directions with respect to each other.

Abstract: A clutch support for supporting a clutch hub of a clutch such that the clutch hub is rotatable is described. The clutch hub comprises a flange that is fixable at clutch housing or the like; a substantially cylindrical element for receiving the clutch hub such that the clutch hub is rotatable; and a sleeve with at least one groove formed therein for providing at least one channel that allows oil to be supplied to the clutch through this channel. The sleeve is manufactured substantially without any chip removing machining action. This achieves the goal to provide a clutch support that can be manufactured in a simple manner and at comparatively low cost.

Abstract: A dual clutch arrangement for a transmission that is provided with a first input shaft and a second input shaft has a clutch housing that is connectable to a drive train in a rotationally fixed fashion. The first and second friction clutches can transmit a torque between the clutch housing and the first and the second input shafts, respectively. The first and second friction clutches are nested in the radial direction with respect to each other and actuated by a first and a second actuating unit that have pistons for pressuring clutch disk packs. The compressive force exerted by the piston of the first actuating unit and the compressive force exerted by the piston of the second actuating unit are directed in axially opposite directions with respect to each other.

Abstract: A clutch support for supporting a clutch hub of a clutch such that the clutch hub is rotatable is described. The clutch hub comprises a flange that is fixable at clutch housing or the like; a substantially cylindrical element for receiving the clutch hub such that the clutch hub is rotatable; and a sleeve with at least one groove formed therein for providing at least one channel that allows oil to be supplied to the clutch through this channel. The sleeve is manufactured substantially without any chip removing machining action. This achieves the goal to provide a clutch support that can be manufactured in a simple manner and at comparatively low cost.

Abstract: An hydraulic servo device for a friction brake in a planetary transmission for motor vehicles contains a cylinder with stepped interior wall, a stationary dividing wall that has a hole and divides the interior of the cylinder into two regions, one piston in each of the two regions formed by the dividing wall, and a hollow piston rod that passes through the hole of the dividing wall and connects the two pistons. The wall of the cylinder has passages, through which a pressure medium enters or exits the cylinder, in each one of the regions formed by the dividing wall. The pistons in each of the regions of the cylinder divides each of the regions into an application-pressure chamber and a release-pressure chamber, forming four chambers in the order of an application-pressure chamber, a release-pressure chamber, an application-pressure chamber, and a release-pressure chamber. The hollow piston rod has openings which allow the pressure medium to enter or exit the piston rod and the application-pressure chambers.

Abstract: A hydraulic servo for friction brakes of an automatic transmission comprises a cylinder (2) with a main piston (3) arranged therein, a smaller cylinder (8) to receive a smaller compensation piston (9), the smaller cylinder communicating with the pressure chamber (5) of the main piston (3) through an orifice (18) controlled by a ball valve (20). A stepped bore (22) connects the pressure chamber (5) to the compensation chamber (17). A stepped piston (23), located in the bore, forms a discharge control valve (24), which controls the discharge of pressure medium from the compensation chamber (17).

Abstract: In an arrangement for fastening an annular member on a hub member, wherein the annular member (1) has a locking tab (14) formed on its inner surface which engages in an annular locking groove (13) formed on the outer circumference of the hub member (2). The annular member (1) is provided with a radially extending wing tab (8) for fixing non-rotatably to the hub member (2).

Abstract: In a drum member (1) having a tooth system (6) for receiving multiple discs (7), which is formed as a one-piece, cold-worked sheen steel member and which, on at least one tooth system of an internal and/or an external tooth system, is provided on part of the tooth system (6) with longitudinally extending recesses (22) of V-shaped cross section, formed during manufacture, for the removal of lubricating and cooling medium, the part of the tooth system (6) on which the longitudinally extending recesses (22) are formed is the foot or the base of the tooth gap.

Abstract: The connection for releasably joining two drum components of a hydraulically-actuated double friction disc clutch includes first and second drum components having circular cylindrical surface directed substantially axially, one overlapping the other. The inner component is formed with a catch groove or two catch recesses and the outer drum component includes catch projections, offset mutually 180.degree. and adapted to become locked within the catch groove. The outer drum includes tabs at an axial end adapted to fit within recesses formed on the periphery of the inner drum between catch projections. The drums are driveably connected by applying oppositely directed axial force sufficient to snap the catch projections into the catch groove. The drums are disassembled by elastically deforming the outer drum until the catch projections clear the catch groove and then applying an axial force that separates the drums.