Pneumatic spring

US6168143A · kind A · utility

Assignee

• Phoenix, LLC · DE

Inventors

• Dirk Lambrecht · Hamburg, DE
• Holger Oertel · Revenahe, DE

Key dates

• Filing date: Oct 23, 1998
• Grant date: Jan 2, 2001
• Expiry date: Oct 23, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2204/416
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pneumatic spring, in particular for rail vehicles, trucks and busses, has a bellows made of elastomer material, if required provided with reinforcing inserts; a pot to whose upper part the bellows are secured, the bellows preferably rolling on the outer wall of the pot; a plate-shaped cover spaced apart from the pot and to which the other end of the bellows is secured; a central rod firmly secured to the cover and which projects out of the lid over a distance extends parallel to the bellows and enters the pot; a ball-and-socket joint located between the pot and the rod and supported against the inner wall of the pot; an air pipe; a slide bush arranged between the ball-and-socket joint and the rod and guided on the outer wall of the rod; and an intermediate bush arranged between the ball-and-socket joint and the slide bush.