Ventilation device for the discharge pipe of a water supply household appliance

US7896976B2 · kind B2 · utility

Assignee

• BSH Bosch und Siemens Hausgeräte GmbH · DE

Inventors

• Gerhard Graf · Dillingen/Saar, DE
• Bernd Hesterberg · Heidenheim, DE

Key dates

• Filing date: Aug 2, 2005
• Grant date: Mar 1, 2011
• Expiry date: May 27, 2028

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06F39/083
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A ventilation device for the discharge pipe for removing a flow medium pumped to a household appliance. A pipe ventilation valve is connected to the discharge pipe by a channel and comprises a valve body disposed in a float chamber filled with a working medium which is separated from the flow medium and actuates the valve body. The valve body is actuated by transmitting a pneumatic force between the flowing medium and the working medium of the float chamber or between the flowing medium and a sealing surface adjacent to the valve body by means of a pressure medium which is separated from the flowing medium and is enclosed in the channel. The inventive pipe ventilation device makes it possible to avoid a direct contact between the valve body of the pipe ventilation valve and the flowing medium, thereby preventing the valve body from being soiled.