Powershift gearbox/transmission

US4685343A · kind A · utility

Assignee

• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Friedrich Ehrlinger
• Franz Muller · Blankenloch, DE
• Herbert Simon · Friedrichshafen, DE
• Hubert Sailer · Markdorf, DE

Key dates

• Filing date: May 15, 1985
• Grant date: Aug 11, 1987
• Expiry date: May 15, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/194
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Powershift transmission especially for tractors, constructed in sections with a multispeed main transmission, a reversing transmission and a range-change transmission with synchronizing clutches, with two power branches having two additional friction clutches which are structurally connected to a double clutch arranged coaxially with the free gears of the main transmission and axial between these free gears.