Spring device

US6102378A · kind A · utility

Assignee

• Phoenix, LLC · DE

Inventors

• Eckhard Gieseler · Freudenberg, DE
• Dirk Lambrecht · Hamburg, DE

Key dates

• Filing date: Jun 5, 1998
• Grant date: Aug 15, 2000
• Expiry date: Jun 5, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2500/20
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A spring device arrangement in particular for the area of railway vehicles, in particular for spring suspension between a bogie and coach body, in which a spring device is located between a supporting plate and a substructure includes two spring systems connected in parallel. Each spring system comprises three parallel springs, the spring being an air spring or hydropneumatic spring comprising a bellows of elastomer material which connects the supporting plate to the upper part of a spring-support piston, the springs of the spring system being interconnected in a pressure-equalizing manner by an overflow duct. The spring is disposed outside the spring and extends from the supporting plate to the substructure, and the spring is installed in the support piston of the spring, a force-transmitting pressure piston simultaneously being used. The lower part of the pressure piston rests on the spring and its upper part, which is provided with an end stop, projects into the interior of the spring, the pressure piston having inside the region of contact with the support piston a vertical slide surface and a stepped stop which produces pretension in conjunction with the spring.