Container piston rod unit

US5048647A · kind A · utility

Assignee

• Stabilus GmbH · DE

Inventors

• Castor Fuhrmann · Brachtendorf, DE
• Herbert Freitag · Koblenz, DE

Key dates

• Filing date: Sep 6, 1989
• Grant date: Sep 17, 1991
• Expiry date: Sep 6, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S277/944
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a gas spring, the piston rod extends through one end of a container. Sealing rings are provided at this end of the container. These sealing rings are in sealing engagement with the piston rod and possibly also in sealing engagement with the inner surface of the container. Axially subsequent sealing rings are made of different caoutchouc materials. These different caoutchouc materials have different coefficients of permeation.