Rotary floor conditioning machine attachment

Claim 1

An attachment for use on a rotary floor conditioning machine comprising: a master block integrally molded of a urethane elastomer including; (i) a centrally located hub; (ii) a circular flange member extending radially from said hub having a generally planar bottom surface; and (iii) a plurality of circumferentially spaced vertically extending tubular receivers carried on said circular flange; a clutch plate secured to said hub; an attachment plate integrally molded of a urethane elastomer including; (i) a circular disk having a generally planar top surface mating with said bottom surface of said flange member; (ii) flexible torque-transmitting posts carried vertically extending on said disk at locations corresponding to the locations of said tubular receivers carried on said master block, said posts having a diameter corresponding to the diameter of said tubular receivers so as to produce a snug connection between said posts and said tubular receivers when said posts are inserted therein for securing said attachment plate to said master block and transmitting torque while allowing flexing therebetween; said circular flange member extending outwardly from a lower portion of said hub; a plurality of circumferentially spaced radially extending stiffening ribs extending between said hub and said circular flange; said circular disk including two superimposed layers of urethane elastomer material; engagement means molded into and extending out the lower layer of said two superimposed layers for penetration and securing a scrubbing or polishing pad; and said upper layer of superimposed layers being less flexible than said lower layer.