Patent ID: 8905079

Claim:
A venturi eductor comprising a flow passage for a first liquid, a dispensing passage with an opening into the flow passage to allow a second liquid to be drawn therethrough and into a first liquid flowing through the flow passage, and a flow restrictor in the dispensing passage, in which the dispensing passage comprises an outer section and an inner section leading from an intermediary inlet to said opening into the flow passage, in which said outer section comprises a face on which said intermediary inlet is formed, and against which said flow restrictor is applied, in which the flow restrictor comprises a body with a plurality of nozzles passing therethrough with varying sizes of orifice, which body is movable between a first position in which a first of said nozzles is aligned with said intermediary inlet, and further positions in each of which a further of said nozzles is aligned with said intermediary inlet, in which a seal member is disposed between said flow restrictor and said face, in which said seal member comprises a plurality of openings, each of which is aligned with one of said nozzles of the flow restrictor, and in which said flow restrictor and said seal member are connected together such that they are movable in unison.