Washing machine

Textiles: fluid treating apparatus – Machines – Single tub and automatic sequential operation mechanism

Reexamination Certificate

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Details

C068S012040, C068S012210, C068S208000

Reexamination Certificate

active

06901777

ABSTRACT:
A washing machine has a laundry drum and a tub and defines an outflow orifice at a lowest point and a second orifice at a point higher. An outflow line fluidically connects to the outflow orifice. A liquid line fluidically connects the outflow line to the second orifice. A turbidity sensor is disposed at the liquid line and responds to a turbidity of liquid flowing therethrough. A pressure controller includes a pressure line connection at the outflow line, a pressure sensor connected to the pressure line connection, a pressure of liquid in the outflow line dependent on a level of liquid in the tub being transmitted from the outflow line to the pressure sensor through the pressure line connection, and the pressure sensor responding to the liquid pressure and controlling a liquid filling level in the tub dependent upon the liquid pressure. In the configuration, the outflow hose has both a connection for a turbidity sensor and a connection for a pressure sensor.

REFERENCES:
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patent: 5881578 (1999-03-01), Proppe et al.
patent: 6481246 (2002-11-01), Johnson et al.
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Europena Patent Office 711, 860 May 1996.
European Patent Office 11,448 Jun. 1984.
WO98/12394 May 1998.

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