Universally attachable rotary brush

Abstract

A trimmer head accessory comprising a (i) head with brush bristles on its underside and (ii) attachment hardware is disclosed. The attachment hardware may comprise (i) a spacer cup, (ii) a washer, and (iii) a set of fasteners. The head and attachment hardware are designed so that the present invention can be used to convert virtually any trimmer into an rotary scrubbing tool. The tool can be used for cleaning driveways, patios, garages, wood decks, walls, and even indoor surfaces.

1 .) A kit for attaching an accessory to a trimmer, comprising: 
 a trimmer head accessory body, said body having a top side and an underside;    a recess in said underside, said recess having certain dimensions;    a central aperture extending through said recess to said top side; and    a set of diverse fasteners for attaching said body to a trimmer's shaft, wherein said fasteners have external dimensions that are substantially the same as the other fasteners in the kit, and wherein said external dimensions are substantially the same as the dimensions of said recess.    
   
   
       2 .) The kit according to  claim 1 , additionally comprising a spacer cup.  
   
   
       3 .) A rotary brush attachable to a trimmer, comprising: 
 a head having a top side and an underside, said underside having a central region and a peripheral region; 
 bristles in said peripheral region;  
 a head recess in said central region; 
 a boss descending into said head recess;  
 a boss recess in said boss; and  
 
 a central aperture extending through said boss recess to said top side.  
   
   
   
       4 .) The rotary brush according to  claim 3 , wherein said head recess is formed by a protrusion in said top side.  
   
   
       5 .) The rotary brush according to  claim 4 , additionally comprising a protective insert in said boss recess.  
   
   
       6 .) A kit for converting a trimmer into a rotary scrubbing tool, comprising: 
 a rotary brush according to  claim 3 ,  4 , or  5 ; and    a set of diverse fasteners for attaching said rotary brush to a trimmer's shaft.    
   
   
       7 .) The kit according to  claim 6 , wherein each of said fasteners has external dimensions, and wherein said external dimensions are substantially the same for at least two of said fasteners.  
   
   
       8 .) The kit according to  claim 7 , additionally comprising a spacer cup.  
   
   
       9 .) The kit according to  claim 8 , additionally comprising a washer.  
   
   
       10 .) A method of converting a trimmer into a rotary scrubbing tool, comprising: 
 providing a trimmer with a spool housing attached to a shaft;    providing a kit according to  claim 7;     removing the spool housing, thereby exposing said shaft;    placing said head on said shaft through said central aperture, so that said shaft extends into said boss recess;    selecting an appropriate fastener from said set of fasteners; and    attaching said head to said shaft by attaching said appropriate fastener to said shaft in said boss recess.    
   
   
       11 .) A method of converting a trimmer into a rotary scrubbing tool, comprising: 
 providing a trimmer with a spool housing and a shaft extending through said spool housing;    providing a kit according to  claim 8;     placing said spacer cup over said shaft, so that said shaft extends through said spacer cup;    placing said head on top of said spacer cap, so that said shaft extends through central aperture into said boss recess;    selecting an appropriate fastener from said set of fasteners; and    attaching said head to said shaft by attaching said appropriate fastener to said shaft in said boss recess.    
   
   
       12 .) A kit for converting a trimmer into a rotary scrubbing tool, comprising: 
 a rotary brush according to  claim 3 ,  4 , or  5 ; and    means for fastening said rotary brush to a variety of trimmers.