Spring system

US6827341B2 · kind B2 · utility

Assignee

• ContiTech Luftfedersysteme GmbH · DE

Inventors

• Christoph Bank · Lehrte, DE
• Gerhard Thurow · Garbsen, DE
• Paul Cerny · Wennigsen (Deister), DE
• Helmut Luncz · Ditzingen, DE
• Andreas Zeltlitz · Brackenheim, DE

Key dates

• Filing date: Jun 2, 2003
• Grant date: Dec 7, 2004
• Expiry date: Jun 2, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2202/154
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a spring system (2) having two spring units (4a, 4b) arranged coaxially with respect to each other. Each spring unit essentially includes a flexible member (6a, 6b) and a roll-off piston (8a, 8b). The two flexible members (6a, 6b), the roll-off pistons (8a, 8b) and a common outer jacket (10) enclose a common pressure space (14) filled with compressible gas or with a hydraulic liquid. A contamination flexible member (16) is mounted between the roll-off piston (8) and the outer jacket (10) in order to prevent a contamination of the flexible member roll-off surfaces. The contamination flexible member (16) is clamped, on the one hand, in the region of the roll-off piston (8) and, on the other hand, on the outer jacket (10). The effective length of the contamination flexible member (16) is somewhat less than the effective length of the shorter of the two work flexible members (6a, 6b). In this way, the contamination flexible member (16) functions additionally as an end stop (pull stop).