Patent ID: 7398787
Filing Date: 2008-07-15
Classification: D06F

Abstract:
1. A non-intrusive device for automatically dosing at least one liquid laundry care composition to an automatic laundry washing machine, the device located along water supply feed to the washing machine with an incoming water supply feed to the device and outgoing water supply feed out of the device, the device comprising: a Venturi tube, the both ends of the tube protruding externally to the housing of the device for connections to the incoming and the outgoing water supply feed, a dosing container for holding the laundry care composition, the throat of the Venturi tube connected by a conduit to the dosing container; a sensor for determining water flow through the incoming water supply feed, the sensor located at the incoming water supply feed and connected to an electronic circuit containing a clock and a processing unit programmed with a machine-generic algorithm to control a solenoid valve, coupled to the same circuit and located within the conduit connecting the Venturi tube and the dosing container, the valve opening or closing the flow of the laundry care composition from the dosing container; wherein the machine-generic algorithm is capable of determining the actual cycle at any duration of wash for various cycle designs from various washing machines, without the input of precise cycle design; and dose the correct products.