Rolling-lobe spring

US6783121B2 · kind B2 · utility

Assignee

• ContiTech Luftfedersysteme GmbH · DE

Inventors

• Christoph Bank · Lehrte, DE
• Paul Cerny · Wennigsen (Deister), DE
• Gerhard Thurow · Garbsen, DE
• Peter Gönnheimer · Waiblingen, DE
• Joachim Frey · Schorndorf, DE

Key dates

• Filing date: Dec 19, 2002
• Grant date: Aug 31, 2004
• Expiry date: Dec 19, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/05
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The sleeve-shaped rolling-lobe flexible member (4) of a rolling-lobe spring (2) is made of elastomeric material and is provided with a reinforcement layer. The ends of the sleeve-shaped rolling-lobe flexible member (4) include neither beads nor cores. The rolling-lobe flexible member (4) is attached pressure-tightly to a cover (8) functioning as a connecting part and/or to a roll-off piston (10) of the spring (2). This pressure-tight attachment is achieved in that each clamping region (18, 20) of the connecting part (cover 8 and/or roll-off piston 10) is provided with a drawn-in connecting surface having at least one peripherally-extending raised portion (22, 24). Clamp rings (12, 14) are assigned to corresponding clamping regions (18, 20) of the connecting parts (8, 10). The clamp rings (12, 14) have respective peripherally-extending recesses (26, 28). The peripherally-extending raised portion (22, 24) provided at the attachment surface of the corresponding connecting part (8, 10) and/or the peripherally-extending recesses (26, 28) located in the corresponding clamp rings (12, 14) are configured to have a rectangular cross section whereby a form-tight connection of the reinforceme…