Pressure tube-piston device

US5116028A · kind A · utility

Assignee

• Stabilus GmbH · DE

Inventors

• Rolf Mintgen · Peitz - Picnjo, DE
• Winfried Wirges · Koblenz, DE
• Udo Wagner · Neuhemsbach, DE

Key dates

• Filing date: Sep 24, 1990
• Grant date: May 26, 1992
• Expiry date: Sep 24, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87378
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

According to an illustrative example of the present invention, a gas spring comprises a pressure tube, a piston rod and a piston connected with the piston rod within the pressure tube. The piston divides the pressure tube into two working spaces, the two working spaces are connected by a control flow passage. A control valve body is allocated to the control valve passage and is controlled through a bore of the piston rod. The control valve body contains an excess pressure flow passage. An excess pressure valve member is provided within the excess pressure flow passage and biased toward an excess pressure valve seat of said control valve body.