Cleaning appliance

Abstract

A cleaning appliance of the cylinder type comprises a separating apparatus for separating dirt from a dirt-bearing fluid flow, and a floor-engaging rolling assembly comprising a main body and a pair of floor-engaging wheels. The most rearward point of the separating apparatus is arranged in line with or rearward of the centre point of the wheels.

1 . A cleaning appliance of the cylinder type comprising a cyclonic separating apparatus for separating dirt from a dirt-bearing fluid flow, the cyclonic separating apparatus comprising a first cyclonic separation unit comprising a low efficiency cyclone and a second cyclonic separation unit comprising a plurality of second cyclones, a floor-engaging rolling assembly, the rolling assembly comprising a main body and a pair of floor-engaging wheels, the most rearward point of the second cyclonic separation unit being arranged rearward of the centre point of the wheels. 
     
     
         2 - 3 . (canceled) 
     
     
         4 . The cleaning appliance of  claim 1 , wherein the most rearward point of the low efficiency cyclone is arranged to be in line with or rearward of the centre point of the wheels. 
     
     
         5 . The cleaning appliance of  claim 1 , wherein the most rearward visible point of the low efficiency cyclone is arranged to be in line with or rearward of the centre point of the wheels. 
     
     
         6 . The cleaning appliance of  claim 1 , wherein the cleaning appliance is arranged so that it is urged to return to an upright position if it is tipped onto its side. 
     
     
         7 . The cleaning appliance of  claim 1 , wherein the wheels are arranged one on each side of the main body. 
     
     
         8 . The cleaning appliance of  claim 1 , wherein the rotational axes of the wheels are inclined upwardly with respect to a floor surface upon which the cleaning appliance is located. 
     
     
         9 . The cleaning appliance of  claim 1 , wherein each wheel has a domed outer surface. 
     
     
         10 . The cleaning appliance of  claim 1 , wherein the first cyclonic separation unit is arranged upstream of the second cyclonic separation unit. 
     
     
         11 . The cleaning appliance as of  claim 1 , wherein the rolling assembly is substantially spheroid or spherical in shape. 
     
     
         12 . The cleaning appliance  claim 11 , wherein the rolling assembly has one or more protrusions, recesses, cut outs or flat portions but remains substantially spheroid or spherical in shape. 
     
     
         13 . The cleaning appliance of  claim 1 , wherein the cyclonic separating apparatus is removably received within a recess in the rolling assembly. 
     
     
         14 . The cleaning appliance of  claim 1 , wherein the longitudinal axis of the cyclonic separating apparatus is inclined such that it lies at an angle in the range of from 0° to 60° from vertical.