Continuously adjustable length adjustment device

US4709790A · kind A · utility

Assignee

• Stabilus GmbH · DE

Inventors

• Herbert Freitag · Koblenz, DE
• Castor Fuhrmann · Brachtendorf, DE
• Hans-Josef Hosan · Neuwied, DE

Key dates

• Filing date: Oct 3, 1985
• Grant date: Dec 1, 1987
• Expiry date: Oct 3, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/0272
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a steplessly adjustable hydropneumatic device the spring chamber of which is arranged at the piston rod exit end and which works with a liquid locking, a very simple hydraulic locking is obtained even for high traction stressing upon the piston rod in that both an annular separator piston and the partition are arranged in the inner chamber of the container, which is penetrated by the piston rod. For the hydraulic traction locking in the case of traction forces exerted suddenly upon the piston rod a valve device is provided which cooperates with the piston rod.