Internal unit, suspended such that it can vibrate, of a...

Details Internal unit, suspended such that it can vibrate, of a... Internal unit, suspended such that it can vibrate, of a...

2011-04-12

2011-04-12

Perrin, Joseph L (Department: 1711)

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

C008S158000, C068S012020, C068S012060, C068S023100, C068S024000

Reexamination Certificate

active

07921494

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

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