Cleaning head

Abstract

There is provided a cleaning head for a surface treating appliance, comprising a suction chamber having a suction aperture, a brush bar arranged in the suction chamber and a comb having a plurality of teeth, each tooth extending into the suction chamber so that at least a distal end of each tooth is arranged to contact a portion of the brush bar. A contact face of each tooth is arranged to contact a radially extending portion of the brush bar and at least one corner between the contact face and a side face of the tooth includes at least one notch. Advantageously, the corner notches help break hair and other debris that might be wound on the brush bar and assists in entraining the hair or debris in the airflow through the suction aperture.

1 . A cleaning head for a surface treating appliance, the cleaning head comprising:
 a suction chamber having a suction aperture;   a brush bar arranged in the suction chamber; and   a comb having a plurality of teeth, each tooth extending into the suction chamber so that at least a distal end of said tooth is arranged to contact a portion of the brush bar;   wherein a contact face of each tooth is arranged to contact a radially extending portion of the brush bar, and wherein at least one corner between the contact face and a side face of the tooth includes at least one notch.   
     
     
         2 . The cleaning head of  claim 1 , wherein at least one of the plurality of teeth comprises an angled tooth that is arranged so as to extend at least partially in a longitudinal direction of the longitudinal axis of the brush bar and towards the suction aperture. 
     
     
         3 . The cleaning head of  claim 2 , comprising a first set of two or more of said angled teeth, wherein the angled teeth of said first set are spaced from one another along a first region of the brush bar. 
     
     
         4 . The cleaning head of  claim 3 , comprising a second set of two or more of said angled teeth, wherein the angled teeth of said second set are spaced from one another along a second region of the brush bar and wherein the angled teeth of said second set are inclined towards the angled teeth of said first set. 
     
     
         5 . The cleaning head of  claim 4 , wherein the first region of the brush bar is a first end region of the brush bar and the second region of the brush bar is a second end region of the brush bar. 
     
     
         6 . The cleaning head of  claim 3 , wherein a third set of the plurality of teeth are arranged between the suction aperture and said first region, the third set of the plurality of teeth comprising transition teeth, wherein each transition tooth of the third set is arranged so as to extend at least partially in said longitudinal direction wherein the transition teeth are not parallel to the angled teeth. 
     
     
         7 . The cleaning head of  claim 3 , wherein the first region extends at least 5% of a longitudinal length of the brush bar. 
     
     
         8 . The cleaning head of  claim 4 , wherein the second region extends at least 5% of a longitudinal length of the brush bar. 
     
     
         9 . The cleaning head of  claim 3 , wherein the brush bar is configured so that when it is rotated, the brush bar forms a mechanical pump to move debris along a first direction of the longitudinal axis, and wherein the angled teeth of said first set are arranged to extend at least partially in a second direction of the longitudinal axis, wherein the second direction is opposed to the first direction. 
     
     
         10 . The cleaning head of  claim 2 , wherein the angled tooth is arranged at an oblique angle relative to a radial direction of the brush bar. 
     
     
         11 . The cleaning head of  claim 10 , wherein said oblique angle of the angled tooth is at least 8°. 
     
     
         12 . The cleaning head of  claim 1 , wherein the plurality of teeth are symmetrical about a mid-point of the brush bar along the longitudinal axis. 
     
     
         13 . The cleaning head of  claim 1 , wherein the brush bar comprises a supporting body and wherein a set of bristles extend from the supporting body such that the bristles form an acute angle (a) with the surface normal of the supporting body, forming a set of slanted bristles. 
     
     
         14 . A surface treating appliance including the cleaning head of  claim 1 .