Pressure and fluid flow activated, simplified proportioning system

Claim 1

A proportioning system comprising a proportioning mixing tank, a storage tank, a source of concentrate, a source of diluent, a constantly acting pump means, and lines for directing the diluent from said source of diluent to the proportioning tank and from the proportioning tank to the storage tank, the pump means pumping concentrate through a conduit from said source of concentrate into the proportioning tank in a prearranged proportion of the concentrate and the diluent, a first sensor operated pressure actuated switch means associated with the proportioning tank for actuation at a certain predetermined pressure in the proportioning tank as said proportioning tank fills, and a second sensor operated fluid flow switch means located in the line just prior to the storage tank for actuation at a predetermined fluid flow, directional valve means in the lines between said pump means, the proportioning tank and the storage tank, said valve means being actuated first by said first sensor operated pressure actuated switch means for directing the fluid from the proportioning tank to the storage tank while said pump means is still operating, while said valve means shut off the proportioning tank from the concentrate and diluent, the second sensor operated fluid flow switch means being actuated to hold said valve means in this position as long as the flow exists continuing this state of said directional valve means, and said second sensor operated fluid flow switch means operating to reverse the directional valves to their original state to once more direct the diluent and concentrate to the proportioning tank.