Cleaning head for a vacuum cleaner
A cleaning head for a vacuum cleaner comprises a housing for facing a surface being cleaned, a first suction opening, a brush bar operable on the surface being cleaned through the first suction opening, a second suction opening and means for switching suction air flow between the first and second suction openings as required. The second suction opening may be narrower than the first opening, to provide a higher speed of suction airflow and hence improved dust collection when the brush bar is not being operated.
1. A cleaning head for a vacuum cleaner, comprising a housing with a first suction opening for facing a surface being cleaned;
an agitating element operable on the surface being cleaned through the first suction opening in response to a flow of air;
a second suction opening facing the surface being cleaned; and
means operable to switch suction airflow between the first and second suction openings as required, wherein the flow of air is provided only when air passes through the first suction opening.
2. The cleaning head according to claim 1 , wherein the agitating element comprises at least one of a rotatable brush or a beater bar, drivable so as to operate on the surface being cleaned.
3. The cleaning head according to claim 1 , wherein the suction openings extend transversely of the housing of the cleaning head.
4. The cleaning head according to claim 1 , wherein the second suction opening is disposed at a position in front of the first suction opening having regard to the normal direction in which the cleaning head is used.
5. A cleaning head for a vacuum cleaner, comprising:
a housing with a first suction opening for facing a surface being cleaned;
an agitating element operable on the surface being cleaned through the first suction opening;
a second suction opening facing the surface being cleaned; and
means operable to switch suction airflow between the first and second suction openings as required, wherein the agitating element is drivable by a turbine powered by suction airflow, the turbine being disposed in a duct leading from the first suction opening to an airflow outlet part of the housing.
6. The cleaning head according to claim 1 , wherein the agitating element is drivable by an electric motor.
7. The cleaning head according to claim 6 , wherein the electric motor drives only the agitating element.
8. The cleaning head according to claim 6 , wherein the electric motor further provides the suction airflow.
9. The cleaning head according to claim 1 , wherein the means to switch the suction airflow between the first and second suction openings is operable to stop the agitating means from being driven when the suction airflow flows through the second suction opening.
10. The cleaning head according to claim 5 , wherein the second suction opening communicates with a second duct which joins the first duct downstream of the turbine.
11. The cleaning head according to claim 10 , wherein the switching means comprises a switching member which opens the first or second duct, and blocks the other of the first or second duct.
12. The cleaning head according to claim 7 , wherein the means to switch the suction airflow between the first and second suction openings is configured to operate an electrical switch to switch off the agitating element motor when the suction airflow is switched to the second suction opening.
13. The cleaning head according to claim 8 , wherein the means to switch the suction airflow between the first and second suction openings causes disengagement of a clutch device provided in a drive train configured to drive the agitating element, when the suction airflow is directed to the second suction opening.
14. The cleaning head according to claim 1 , wherein the second suction opening presents a cross-sectional area which is less than that of the first suction opening.
15. A cleaning head for a vacuum cleaner, comprising:
a housing with a first suction opening for facing a surface being cleaned;
an agitating element operable on the surface being cleaned through the first suction opening in response to a suction air flow through the first suction opening;
a second suction opening facing the surface being cleaned; and
a switching member disposed within the cleaning head and movable between a first position to expose the first suction opening to the suction air flow and a second position to expose the second suction opening to the suction air flow.
16. The cleaning head of claim 15 , wherein the switching member substantially blocks the second suction opening when disposed in the first position and the switching member substantially blocks the first suction opening when in the second position.
17. The cleaning head of claim 15 , further comprising an electric motor configured to drive the agitating member.
18. A cleaning head for a vacuum cleaner, comprising:
a housing with a first suction opening for facing a surface being cleaned;
an agitating element operable on the surface being cleaned through the first suction opening;
a second suction opening facing the surface being cleaned; and
a switching member disposed within the cleaning head and movable between a first position to expose the first suction opening to a suction air flow and a second position to expose the second suction opening to the suction air flow, wherein the agitating element is selectively drivable by a turbine disposed to receive suction air flow, the turbine disposed in a duct disposed to provide flow between the first suction opening and an outlet of the housing.