arrows 228 to pass through the brush arrays 204 and 206 with minimal resistance however when piston 216 is actuated to bring serrations 220 and 222 together while overpowering spring 218 the flow paths 224 and 226 misalign at the point 230 where they are pushed together with the flow paths so misaligned the brush arrays 204 and 206 act as a diverter these fig6 8 illustrate yet another embodiment of an articulated diverter having the advantages described before as before it actuates automatically when the flow rate is stepped up to levels needed for mill operation fig9 11 are an alternative embodiment again showing sleeves 300 and 302 with sleeve 300 movable biased apart by spring 304 which is covered by sleeve 306 to prevent entry of debris in the open position of fig1 the paths 308 and 310 are spaced apart forming a gap 312 flow can go through as represented by arrow 314 sleeves 300 and 302 can be splined so they can translate axially without relative rotation since paths 308 and 310 are misaligned translation of the sleeves 300 and 302 urged by piston 316 in effect creates dead ends 318 that block flow this can be done by simply abutting the arrays or nesting them with mating notch patterns as shown in.