Multispeed manual transmission

US7454991B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Gerhard Buck · Friedrichshafen, DE
• Wolfgang Rebholz · Friedrichshafen, DE
• Siegfried Stutzle · Friedrichshafen, DE
• Michael Riedhammer · Bermatingen, DE
• Hugo Burkhart · Ravensburg, DE
• Michael Herlitzek · Eriskirch, DE
• Jurgen Legner · Friedrichshafen, DE
• Jochen Schneider · Tettnang, DE
• Michael Thielmann · Friedrichshafen, DE
• Roland Fischer · Trostberg, DE

Key dates

• Filing date: Dec 14, 2004
• Grant date: Nov 25, 2008
• Expiry date: Dec 31, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19405
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

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).