Self-blocking gas spring released by external force

US4307875A · kind A · utility

Assignee

• Stabilus GmbH · DE

Inventors

• Klaus Schnitzius · Rheinbrohl, DE
• Herbert Freitag · Koblenz, DE

Key dates

• Filing date: Jul 24, 1979
• Grant date: Dec 29, 1981
• Expiry date: Jul 24, 1999

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/346
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A gas spring in which a valve permits flow of a pressurized fluid between two compartments of a cylinder cavity separated by a piston for movement of a piston rod attached to the piston outward of the cavity while inward movement of the piston rod is normally blocked by a mechanism which responds to a predetermined, axial, inward force applied to the piston rod for releasing the same.