Side brush for a robotic vacuum cleaner and robotic vacuum cleaner comprising a side brush

Abstract

A side brush for a vacuum cleaner includes a brush core and at least ten filament clusters regularly distributed over a circumferential surface of the brush core. Each filament cluster includes brush filaments having a filament diameter that is greater than or equal to 0.3 millimetres.

What is claimed is: 
     
         1 . A side brush for a vacuum cleaner, the side brush comprising:
 a brush core; and   at least ten filament clusters regularly distributed over a circumferential surface of the brush core,   wherein each of the filament clusters comprises brush filaments having a filament diameter that is greater than or equal to 0.3 millimetres.   
     
     
         2 . The side brush of  claim 1 , wherein the filament diameters of the brush filaments of each filament cluster are the same or at least substantially the same. 
     
     
         3 . The side brush of  claim 1 , wherein, when a diameter of the filament clusters is two millimetres, each of the filament clusters comprises thirty to forty or fewer brush filaments. 
     
     
         4 . The side brush of  claim 3 , wherein each filament cluster comprises ten to twenty brush filaments. 
     
     
         5 . The side brush of  claim 1 , wherein, when a diameter of the filament clusters is three millimetres, each of the filament clusters comprises eighty to ninety or fewer brush filaments. 
     
     
         6 . The side brush of  claim 5 , wherein each filament cluster comprises forty to fifty brush filaments. 
     
     
         7 . The side brush of  claim 1 , wherein, when a diameter of the filament clusters is four millimetres, each of the filament clusters comprises one hundred to two hundred or fewer brush filaments. 
     
     
         8 . The side brush of  claim 7 , wherein each of the filament clusters comprises seventy to ninety brush filaments. 
     
     
         9 . The side brush of  claim 1 , wherein, when a diameter of the filament clusters is five millimetres, each of the filament clusters comprises two hundred to three hundred or fewer brush filaments. 
     
     
         10 . The side brush of  claim 9 , wherein each of the filament clusters comprises one hundred to two hundred brush filaments. 
     
     
         11 . The side brush of  claim 1 , wherein the filament clusters are disposed directly on the brush core. 
     
     
         12 . A robotic vacuum cleaner comprising at least one side brush as recited in  claim 1 .