Surface conditioning attachment

Abstract

A surface cutting attachment for a powered floor abrading or polishing machine, said attachment having a plurality of frusto-conical blades releasable secured in a support having a complimentary frusto-conical socket. Upon the cutting edge becoming worn the frusto-conical blade can be rotated to present a previously unused part of the annular cutting edge. The blades are mounted on a rotatable plate in equally spaced circumferential intervals and a plurality of plates are rotatably mounted at equally spaced circumferential intervals on a power drive disc.

1 . A surface cutting attachment for a powered floor conditioning machine comprising:
 a horizontally disposed disc adapted for connection to said machine for driven rotation about a first vertical axis,   three horizontal disposed annular plates rotatably mounted on the underside of said disc for rotation in a predetermined direction about equally spaced vertical axes defining a circle concentric with said first vertical axis, and   at least three cutter assemblies mounted near the circumference of and extending downwardly from each of said plates, said cutter assemblies being equally spaced circumferentially to define a circle concentric with said plate upon which they are mounted and each including an igloo shaped support rigidly secured to the underside of its associated plate, said support having a notch with a vertical wall, said vertical wall having a facing frusto-conical socket formed therein facing in said predetermined direction, and   a frusto-conical blade having a frusto-conical surface in wedging engagement with said socket, said frusto-conical blade presenting a radially outer leading cutting edge having a portion extending downwardly beyond said igloo shaped support, said cutting edge being adapted to cuttingly engage a floor surface when said plate is rotated in said predetermined direction of said leading edge.   
   
   
       2 . The attachment of  claim 1  wherein said leading edge is tapered. 
   
   
       3 . The attachment of  claim 1  wherein said blade is releasably secured to said support by a releasable fastener and wherein upon release of said releasable fastener, said blade is rotatably positionable to present a different portion of said cutting edge in cutting relation to said floor. 
   
   
       4 . The attachment of  claim 1  wherein said attachment includes six cutting assemblies. 
   
   
       5 . The attachment of  claim 1  wherein said blade includes an annular opening concentric with the axis of said blade and said igloo shaped support includes a threaded annular opening concentric with said socket and further comprising a threaded fastener extending through said annular opening and in threaded engagement with said threaded annular opening. 
   
   
       6 . The attachment of  claim 5  wherein said threaded opening includes an unthreaded tapered end portion in said socket and wherein said screw includes a tapered shoulder in engagement with said tapered end portion. 
   
   
       7 . The attachment of  claim 1  wherein a downward extending flap is secured to a part of said disc between said plates, said flap being operative to sweep abraded material from the floor during rotation of said disc. 
   
   
       8 . The attachment of  claim 7  wherein a flap is secured to said disc between each circumferentially adjacent pair of said plates.