Locking device for locking objects that move in relation to each other

US6296089A · kind A · utility

Assignee

• Stabilus GmbH · DE

Inventors

• Klaus Koch · Sankt Goarshausen, DE
• Rainer Sauer · Anschau, DE
• Oliver Schuttler · Monreal, DE

Key dates

• Filing date: Sep 17, 1999
• Grant date: Oct 2, 2001
• Expiry date: Sep 17, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/56
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A locking device includes a cylinder chamber that is filled with a working medium and is divided by a piston into two working sections. A flow connection between the working sections is controlled by a check valve and a gate valve, which are arranged in parallel. When the check valve opens, dynamic pressure of the working fluid flowing through the check valve from one working section acts on a fluid contact surface of the gate valve and opens the gate valve. After it opens, the gate valve is kept in the open position by a pressure in a bypass past the check valve so that working fluid can thereafter flow through the fluid connection, regardless of the state of the check valve.