in fig1 it is seen that there is a developed agitator body surface 10 which includes in its showing a short agitator 12 indicated by dimension lines and a longer agitator 14 also indicated by dimension lines . these agitators can preferably be molded from foamed plastic such as polypropylene . in each of the agitators it can be seen that a series of beater bars 16 , 16 are disposed obliquely relative to the axis of the agitator roll some in paired configuration to increase beater bar area and still permit moldability . these beater bars are relatively short and are molded integrally into the agitator body 18 ( fig2 and 3 ) and have a truncated triangular cross section 20 with a slightly curved top 22 . the ends of each of the beater bars 16 are equally curvilinear in nature having curvilinear sides 24 , 24 to furnish a finalized smooth contour . short beater bars were selected over elongated bars because of the general molding considerations . the beater bars 16 , 16 are also obliquely angulated relative to the agitator roll axis rather than placed parallel thereto since a similar noise effect occurs with parallel thereto positioning . also , although beater bars exactly perpendicular to the agitator roll axis would generate low noise they would do very little working action on the rug so an angular positioning of the beater bar 16 was selected as ideal . this angle can be best defined by an angle 26 of 20 ° to 25 ° from the circumference since this permits molding of the agitator body 18 but still provides a working action of the beater bars 16 in the rug or floor covering . a series of brush strips 28 , 30 , 32 and 34 ( elongated agitator 14 ) are disposed on the agitator body surface 10 , with these brush strips taking an angle 36 of 20 ° to 26 ° to the axis of the body to provide a spiral of some steepness to insure that a relatively large amount of brush strip is on the floor at any one time . this limits the beater bar action of these brush strips and lessens the noise generated by the agitator . the brush strips 28 , 30 , 32 and 34 are arranged in a chevron pattern in that the brush strips 28 and 32 tend to peak along the agitator body 10 and similarly brush strips 30 and 34 also tend to peak . this can be seen in fig4 wherein the brush strips 28 and 30 peak along their spiralling path on the elongated agitator 14 and the brush strips 32 and 34 also peak . in the short agitator 12 , the brush strips 28 and 30 also peak along their spiralling path while the brush strips 32 &# 39 ; and 34 &# 39 ; while even of abbreviated length tend to provide a chevron design along their spiral . the brush strips 28 and 30 are offset respectively , from the brush strip 32 or brush strip 32 &# 39 ; and the brush strip 34 or brush strip 34 &# 39 ;, generally at a suction opening 36 of the cleaner leading from a duct 38 in a cleaner body 40 . the duct 38 , of course , leads to a motor - fan system ( not shown ) to proide suction to the opening 36 &# 39 ; when the agitator 12 or agitator 14 is disposed in an agitator chamber 42 or agitator chamber 42 &# 39 ; in the main body 40 or main body 40 &# 39 ;, respectively . with , essentially , a peak of the chevron design ( offset ) of the brush strips of the agitators 12 and 14 located at the suction opening 36 , there is a tendency for dirt to be moved along the rug or floor covering surface as the agitator 12 or 14 rotates during the cleaning process towards the suction opening 36 . this aids in the cleaning function for the cleaner for which agitator 12 or agitator 14 is a sub - assembly . at the same time , the offset of the chevron tends to permit easy location of the short beater bars 16 , on the long portion of the agitator 12 or the agitator 14 , angled towards the suction opening and with the beater bars 16 on the short portion of the agitator 12 or the agitator 14 also angled towards the suction opening . again this tends to screw or move the dirt and entrained debris in the rug or floor covering being cleaned towards the suction opening 36 . a pulley section 44 ( fig5 ) is formed as a molded part and integrated into the agitator 12 or agitator 14 by either of these agitators being molded around it , a groove 46 being provided for this purpose . a groove 48 is also disposed on the agitator 12 or 14 to provide clearance for the agitator at a bottom plate cross piece 50 . it should be clear from the foregoing description that a novel agitator arrangement has been provided which fulfills the functions of the invention set out . it should further be obvious that only a preferred embodiment has been shown and that many modifications could be made to it which would still fall within the spirit of the invention .