Abstract: The invention relates to a shifting device (1) for a group transmission with a first switching device (9) for switching the gear steps of a group, a second switching device (10) for switching the groups of the group transmission, and a locking device (22), which features a locking member (23), which can be moved from a releasing position into a locking position, in which the first switching device (9) is locked in a neutral position. Inventively, the locking member (23) can be moved independently of a switching movement of the second switching device (10) from the releasing position into the locked position. The invention also involves a method for controlling a switching device (1) for a group transmission.

Abstract: An electromagnetic dual-action control valve with a housing (2), with connections (15, 16, 17) for inflow and outflow lines for a pressure medium, with a solenoid (3) and with two armatures arranged to move within the solenoid (3) for opening and closing the line connections. To simplify the structure of such a dual-action control valve, it is provided that one of the armatures is formed as a hollow armature (4) with a closed end (11), within which an inner armature (5) is arranged to move coaxially, and the hollow armature (4) has openings (20, 21) for the pressure medium, of which one opening (21) can be closed by a sealing surface (13) of the inner armature (5).

Abstract: An electromagnetic dual-action control valve with a housing (2), with connections (15, 16, 17) for inflow and outflow lines for a pressure medium, with a solenoid (3) and with two armatures arranged to move within the solenoid (3) for opening and closing the line connections. To simplify the structure of such a dual-action control valve, it is provided that one of the armatures is formed as a hollow armature (4) with a closed end (11), within which an inner armature (5) is arranged to move coaxially, and the hollow armature (4) has openings (20, 21) for the pressure medium, of which one opening (21) can be closed by a sealing surface (13) of the inner armature (5).