Patent · US Expired

Automatically controlled washing machine with overflow protection

US6698254B2 · kind B2 · utility

0Cited by

6References

7Claims

0Family size

Assignee

BSH Bosch und Siemens Hausgeräte GmbH · DE

Inventors

Edwin Bolduan · Berlin, DE
Harald Moschütz · Großbeeren, DE
Horst Wiemer · Kleinmachnow, DE

Key dates

Filing date	Jun 14, 2002
Grant date	Mar 2, 2004
Priority date	—
Expiry date	Jun 14, 2022

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06F39/083
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An automatically controlled washing machine includes a washing liquid circulation system which drains washing liquid from the bottom of a laundry treatment space and, via a supply orifice, supplies the washing liquid again to the laundry treatment space. The supply orifice is configured such that a dynamic pressure is present in the circulating line during a pumping operation. The washing liquid circulation system has a sensor device which is sensitive to the dynamic pressure and transmits a signal for controlling a supply valve for fresh water as a function of the dynamic pressure. The sensor device also detects a static pressure present in the laundry treatment space and in the circulating line, when the circulating pump is switched off. The sensor device transmits a signal for executing safety measures when the static pressure exceeds a given safety level so that the washing machine is protected against overflowing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.