Damping valve for power steering

US6612321B1 · kind B1 · utility

Assignee

• ZF Lenksysteme GmbH · DE

Inventor

• Peter Ertle · Durlangen, DE

Key dates

• Filing date: Mar 19, 2001
• Grant date: Sep 2, 2003
• Expiry date: Mar 19, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87539
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a damping valve for pressure medium-actuated operating circuits, a spring element is installed between housing, cover and counter-contour. In the opening direction, the spring element is pressed against the counter-contour by the pressure medium flowing through, so that a flow passage cross-section allowing almost unimpeded passage of the pressure medium is obtained. In the opposite direction, the throttling direction, the spring element rests on the cover and blocks the flow of the pressure medium until a well-defined pressure builds up, which lifts the inner side of the spring element from the counter-contour and thus opens a reduced flow passage cross-section.