Arrangement for hydraulic actuation of a movable component on vehicles

US6446538B2 · kind B2 · utility

Assignee

• Hoerbiger Hydraulik GmbH · DE

Inventors

• Jürgen Osterried · Pfronten, DE
• Peter Schmied · Schongau, DE

Key dates

• Filing date: Feb 20, 2001
• Grant date: Sep 10, 2002
• Expiry date: Feb 20, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B20/004
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, includes at least one double-action working cylinder (1) whose working chambers are connected to a pressure source (5) via a pressure line (4) or whose working chambers are at least temporarily connectable thereto through a switching valve (11). To make possible an automatic emergency operation of the normally hydraulic operated vehicle component in a simple and secure manner during failure of the pressure source, and in spite of the small available space and the mounting site with its difficult accessibility, a check valve (16) is inserted into the pressure line (4) blocking in the direction of the pressure source (5) and a pressure relief line (17) originates at a location between the check valve (16) and the switching valve arrangement for the working cylinder (1, 11) whereby a shut-off element (19) is inserted in the pressure relief line that opens when the pressure of the pressure source drops.