Fire protection in a piston-cylinder unit

US6840153B2 · kind B2 · utility

Assignee

• ZF Sachs AG · DE

Inventors

• Peter Wirth · Winsen, DE
• Wolfgang Bach · Berlin, DE
• Hassan Asadi · Schweinfurt, DE
• Gerald Fenn · Pfersdorf, DE
• Hans Luksch · Zeil am Main, DE

Key dates

• Filing date: Dec 3, 2002
• Grant date: Jan 11, 2005
• Expiry date: Mar 19, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S277/917
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Piston-cylinder unit comprising a cylinder in which a work space is filled with a work medium and which is limited by a closure and is sealed by at least one seal. The closure is fixed axially by a positive engagement with the cylinder up to a temperature threshold and the closure can carry out an axial movement for relieving pressure above the temperature threshold. A cutting device cancels the sealing function of the seal during the axial movement of the closure for relieving pressure.