Safety device for water-conducting household appliances

US5309939A · kind A · utility

Assignee

• Bosch-Siemens Hausgeraete GmbH

Inventors

• Ernst Stickel · Giengen an der Brenz, DE
• Rudiger Eiermann · Staufen, DE
• Helmut Jerg · Giengen an der Brenz, DE

Key dates

• Filing date: Jul 10, 1992
• Grant date: May 10, 1994
• Expiry date: Jul 10, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7423
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A water-conducting household appliance includes a liquid container having a static content level, a fill control device, a cycle control unit, an inflow valve to be opened by the cycle control unit and closed by at least one of the fill control device and the cycle control unit, an evacuation pump, a switch having a switching position in which the switch turns on the evacuation pump and selectably closes the inflow valve, and a chamber hydraulically communicating with the liquid container and having an opening for the entry of water. A safety device for the appliance includes a safety level switch device having a float disposed in the chamber, the float having a switching position in which the float acts upon the switch, and the float having a position of repose in which the float is kept at a distance above the static content level and in which the float acts upon the switch to switch off the evacuation pump.