Abstract: A shiftable multispeed reverse transmission having one input shaft (1) and a plurality of countershafts (2, 3, 4, 5, 6, 7) and one output shaft (8). One of gears and/or idle gears being situated upon the countershafts (2, 3, 4, 5, 6, 7) for non-rotatably connection with the countershafts, via shiftable clutches, for gear and direction change. The reduction ratios being generated by spur pinion stages and at least one shiftable planetary stage (P).

Abstract: A form-locking clutch (2) for an automobile transmission, in particular for a clutch device formed by a form-locking coupling and the disc clutch (2), having a piston (6) connected to a drive or in a torque proof piston manner to a drive, is connectable to an external disc carrier (3) of the disc clutch via the form-locking clutch (2) constructed as a coupling disc, which encompasses a synchronizing ring (1), whereby at least one guide pin (4) connected with the external disc carrier (3) of the disc clutch is provided, which can move along a connecting link (5) provided on the synchronizing disc (1) of the form-locking clutch (2) in such a way that, with a torque proof connection of the external disc carrier (3) to the piston (6) and for the case of a tooth on tooth position of the components, they can rotate so that the coupling disc engages.

Abstract: A shiftable multispeed reverse transmission having one input shaft (1) and a plurality of countershafts (2, 3, 4, 5, 6, 7) and one output shaft (8). One of gears and/or idle gears being situated upon the countershafts (2, 3, 4, 5, 6, 7) for non-rotatably connection with the countershafts, via shiftable clutches, for gear and direction change. The reduction ratios being generated by spur pinion stages and at least one shiftable planetary stage (P).

Abstract: A drive device comprises a first switchgear (9) and a second switchgear (11) which can be actuated respectively hydraulic pressure in an opening direction and via spring force in a closing direction, and which are provided with a device (26) by which the first switchgear (9) and the second switchgear (11) are to be actuated in the opening direction when the switchgears are actuated in the closing direction.

Abstract: A drive device comprises a first switchgear (9) and a second switchgear (11) which can be actuated respectively hydraulic pressure in an opening direction and via spring force in a closing direction, and which are provided with a device (26) by which the first switchgear (9) and the second switchgear (11) are to be actuated in the opening direction when the switchgears are actuated in the closing direction.

Abstract: An engine-rpm-dependent arrest device to prevent non-permitted down shifts in motor vehicle transmissions containing a pilot valve (1) and a control valve (2), both having two shift positions. One shift position of the control valve (2) is engaged by the pressure acting upon a piston surface (36) of the control-valve piston (31) and exceeding a given value of an engine-rpm-dependent low-pressure pump (20). The control valve (2) is exclusively in contact with the pressure medium conveyed by the low-pressure pump (20) and controls the large end surface (40) and the annular surface (41) of a pilot-valve piston (38) designed as stepped piston. If when the high gear is engaged and the engine rpm is above a certain limit value, the gear-shift valve (7) is moved to its position for low gear, then an actuation of the actuation device (15) for the low gear is prevented via the pilot valve (1).