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LEWA GMBH

LEWA GMBH Patent applications
Patent application numberTitlePublished
20100288381METHOD AND APPARATUS FOR MIXING FLUIDS - At least two fluids separated from one another are mixed by means of pump force via respective suction lines and conveyed into a conveying line by a pump delivery stroke. The fluids are mixed in the pump head of a single oscillating positive displacement pump, the drive of which is controlled in accordance with a proportion of the fluids to be mixed, the suction stroke of the drive is divided over its rotary angle into individual sections during which the fluids are sucked into the pump head one after another, whereupon the fluids which have already been mixed in the pump head are ejected into the conveying line during the subsequent pump delivery stroke. The suction lines of at least two fluids to be mixed are provided with valves and connected to the pump head, the drive controller of which is configured for switching over the valves.11-18-2010
20100284827HOMOGENIZATION OF THE CONVEYING FLOW IN OSCILLATING POSITIVE DISPLACEMENT PUMPS - A method for homogenizing conveying flow from at least two oscillating positive displacement pumps utilizing a drive motor for each pump and a rotating shaft, the fluid conveying flow in a conveying line is generated by the oscillating positive displacement pumps, the drive motors controlled such that the conveying flow generated overall in the conveying line is largely uniform or constant.11-11-2010