Zf Friedrichshafen Ag

Zahnradfabrik Friedrichshafen, Ag.

Gerhard Buck

Siegfried Stützle

Jürgen Legner

Wolfgang Rebholz

Helmut Eymuller

Hugo Burkhart

Michael Riedhammer

Roland Fischer

Jochen Schneider

Michael Herlitzek

Helmut Eymüller

Michael Thielmann

A shiftable multispeed reverse transmission having one input shaft () and a plurality of countershafts () and one output shaft (). One of gears and/or idle gears being situated upon the countershafts () 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).

Multispeed manual transmission

A drive device comprises a first switchgear () and a second switchgear () 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 () by which the first switchgear () and the second switchgear () are to be actuated in the opening direction when the switchgears are actuated in the closing direction.

Drive device

Engine-rpm-dependent arrest device to prevent non-permitted down shifts

Growing community of inventors

Friedrichshafen, Germany

Gerhard Buck