W WHITLOCK

VACUUM AND PNEUMATIC CONVEYING, MIXING, AND BLENDING EQUIPMENT FOR DRY BULK MATERIALS-NAMELY, [ROTARY BLENDERS,] VACUUM CONVEYORS, PNEUMATIC CONVEYORS, REGRIND CONVEYORS, BULK CONVEYORS, [STORAGE BIN TI LTERS,] VACUUM HOPPERS, [CYCLONE SEPARATORS,] SURGE HOPPERS, [BELT FLOW BLENDERS, RIBBON BLENDERS, VERTICAL MIXERS, LOW HEAD SEPARATORS, AND] VACUUM POWER UNITS, AND PARTS THEREOF