Patent · US Active

Internal unit, suspended such that it can vibrate, of a laundry treatment machine, method for controlling a laundry treatment machine, and use of an electronic sensor in an internal unit

US7921494B2 · kind B2 · utility

1Cited by

10References

21Claims

0Family size

Assignee

Diehl AKO Stiftung & Co. KG · DE

Inventors

Martin Weinmann · Bad Waldsee, DE
Roman-Hartmut Wauer · Leutkirch im Allgäu, DE
Alexander Muller · Steinen, DE

Key dates

Filing date	Feb 21, 2006
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Nov 22, 2028

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06F2105/46
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An internal unit of a washing machine or spin-dryer normally includes a washing container, which has a laundry drum mounted in the container such that it can rotate, and an electric motor for driving the laundry drum via a reduction gear, a transmission, or direct drive. The internal unit is suspended in a machine housing such that it can vibrate and constitutes an overall system which can vibrate in a damped manner and which is subject to unbalance-dependent resonance phenomena in specific regions of the rotational speed of the laundry drum. The causes of these resonance phenomena are vibratory movements due to momentary unbalances in the load in the laundry drum. To reduce these unbalance-dependent resonance phenomena, the internal unit is provided with a vibration sensor which is rigidly or substantially rigidly coupled to the internal unit

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