Countershaft transmission

US4570503A · kind A · utility

Assignee

• Caterpillar Tractor Co. · US

Inventor

• Michael Theobald · Ditzingen, DE

Key dates

• Filing date: Sep 17, 1984
• Grant date: Feb 18, 1986
• Expiry date: Sep 17, 2004

Classification

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

Abstract

A countershaft transmission provides three forward speeds and three reverse speeds using an input shaft, an output shaft, an intermediate shaft, five rotating clutch assemblies of the interleaved multiple plate and disc type, and eight gears. The first speed clutch assembly is mounted on the intermediate shaft, the second and third speed clutch assemblies are mounted on the output shaft, the remaining directional clutch assemblies are mounted on the input shaft, and the clutch assemblies are generally compactly grouped. Advantageously, no separate idler gear and associated shaft are required.