Valve arrangement

US8444110B2 · kind B2 · utility

Assignee

• DANFOSS A/S · DK

Inventors

• Verner Smidt · Sweetgum Street, DK
• Lasse Nicolai Langmaack · Nordborg, DK
• Siegfried Zenker · Kirchseeon, DE
• Erik Haugaard · Sweetgum Street, DK
• Carsten Christensen · Avenue Madeleine, DK
• Welm Friedrichsen · Nordborg, DK

Key dates

• Filing date: May 24, 2010
• Grant date: May 21, 2013
• Expiry date: Aug 18, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7837
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention concerns a valve arrangement (7) comprising a flow path (11) connecting an inlet (9) and an outlet (10), a closing means (12) arranged in said flow path (11), a resetting means and a first pressure in a first pressure chamber (14) acting in a closing direction on said closing means (12), a pressure of said outlet (10) and a second pressure in a second pressure chamber (18) corresponding to a pressure of said inlet (9) when said closing means (12) is closed acting in opening direction on said closing means (12), said first pressure chamber (14) being connectable to the outlet (10) via an auxiliary valve (13). It is intended to keep small a pressure pulse when opening the valve arrangement (7). This is achieved in that the closing means (12) having a first opening state (A) and a second opening state (B), a flow resistance of said closing means (12) in said first opening state (A) being larger than a flow resistance of said closing means in said second opening state (B).