Infinitely variable transmission with two pairs of conical flanges

US6174253A · kind A · utility

Assignee

• LuK Getriebe-Systeme GmbH · DE

Inventors

• Bernhard Walter · Oberkirch, DE
• Kurt Graef · Pühlheim, DE
• Rainer Eidloth · Bamberg, DE

Key dates

• Filing date: Dec 18, 1998
• Grant date: Jan 16, 2001
• Expiry date: Dec 18, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H9/18
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An infinitely variable transmission has a first pair of conical flanges arranged on a first shaft and a second pair of conical flanges arranged on a second shaft, where each pair has an axially movable flange and an axially fixed flange. A torque-transmitting means is disposed between the pairs of conical flanges. Piston/cylinder units and plenum chambers comprising circular ring-shaped elements serve to apply pressure to and effect axial movement of the movable conical flanges. The ring-shaped elements have radially inner portions with openings to receive the shafts. The radially inner portion of at least one of the ring-shaped elements has a welded seam connecting the ring-shaped element to the shaft received by its opening.