Fluid valve, particularly return valve for a painting system

US8881757B2 · kind B2 · utility

Assignee

• Duerr Systems AG · DE

Inventors

• Rainer Melcher · Oberstenfeld, DE
• Frank Herre · Oberriexingen, DE
• Michael Baumann · Herrenberg, DE
• Thomas Buck · Sachsenheim, DE

Key dates

• Filing date: May 5, 2010
• Grant date: Nov 11, 2014
• Expiry date: Mar 16, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87869
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Exemplary illustrations of a fluid valve, e.g., a return valve for returning residual paint, rinsing agent, and compressed air from a paint line when changing color in a painting system, are disclosed. An exemplary fluid valve may be adjusted between an open position, in which the fluid valve is at least partially open, e.g., for rinsing a paint line with a rinsing agent and for pressurizing the paint line with a new color for the color change, and a closed position, in which the fluid valve is closed, e.g., for applying the new color after the color change. An exemplary fluid valve may switch to the closed position, upon actuation by the medium thereof, e.g., medium flowing through or present in the valve. In another example, a fluid valve may close depending on the fluid present at the input side.