Patent ID: 7290680
Filing Date: 2007-11-06
Classification: B67D,F16K

Abstract:
1. A dispensing valve for mixing and dispensing first and second fluids at a predefined ratio, comprising: a dispensing valve body having first and second channels for connection to respective sources of the first fluid and second fluids; first and second fluid flow sensing means for sensing respective flows of the first and second fluids through said first and second channels; a controller coupled to said first and second fluid flow sensing means for receiving indications of the flows of the first and second fluids through said first and second channels; a first valve coupled to said first channel, said controller being coupled to said valve for operating said valve to control a flow of the first fluid through said first channel; and a second valve coupled to said second channel, said second valve including a valve member movable between a first position fully closing and a second position opening said second channel for controlling flow of the second fluid through said second channel, and an actuator coupled to said valve member and to said controller for being operated by said controller to move said valve member between said first and second positions and to all positions therebetween to control the flow of the second fluid through said second channel, said controller regulating the flow of the second fluid through said second channel as a function of the sensed flow of the first fluid to maintain the predefined ratio therebetween.