Floor tool for a cleaning appliance
A floor tool for a cleaning appliance including a cleaner head rotatably attached to a conduit carried by a pair of wheels that converge beneath the conduit.
1. A floor tool for a cleaning appliance comprising a cleaner head rotatably attached to a conduit carried by a pair of wheels that converge beneath the conduit, wherein the wheels have axes of rotation that intersect above a line passing through the wheel centres.
2. The floor tool of claim 1 , wherein the wheels are separated beneath the conduit by a gap that subtends an angle at a centre of the conduit by no more than 20 degrees.
3. The floor tool of claim 1 , wherein the wheels have surfaces of spherical curvature.
4. The floor tool of claim 1 , wherein the wheels have surfaces coincident with a common sphere.
5. The floor tool of claim 1 , wherein the wheels are dome-shaped.
6. The floor tool of claim 1 , wherein the wheels provide a substantially continuous arcuate support in a plane normal to a longitudinal axis of the conduit.
7. The floor tool of claim 4 , wherein the conduit has a longitudinal axis that is coincident with the centre of the common sphere.
8. The floor tool of claim 1 , wherein the conduit comprises a forward portion pivotally attached to a rearward portion, the cleaner head is rotatably attached to the forward portion, and the wheels are rotatably attached to the forward portion.
9. The floor tool of claim 8 , wherein the wheels are attached to the forward portion at a first set of points, and the rearward portion is attached to the forward portion at a second set of points located above the first set of points.
10. A floor tool for a cleaning appliance comprising a cleaner head rotatably attached to a conduit carried by a pair of dome-shaped wheels, the wheels having axes of rotation that are oriented such that the wheels converge beneath the conduit.
11. The floor tool of claim 10 , wherein the wheels provide a substantially continuous arcuate support in a plane normal to a longitudinal axis of the conduit.
12. The floor tool of claim 10 , wherein the wheels are separated beneath the conduit by a gap that subtends an angle at a centre of the conduit by no more than 20 degrees.
13. The floor tool of claim 10 , wherein the wheels have surfaces of spherical curvature.
14. The floor tool of claim 10 , wherein the wheels have surfaces coincident with a common sphere.
15. The floor tool of claim 10 , wherein the conduit comprises a forward portion pivotally attached to a rearward portion, the cleaner head is rotatably attached to the forward portion, and the wheels are rotatably attached to the forward portion.
16. A floor tool for a cleaning appliance comprising a cleaner head rotatably attached to a conduit carried by two wheels only that converge beneath the conduit.
17. The floor tool of claim 16 , wherein the wheels are dome-shaped.
18. The floor tool of claim 16 , wherein the wheels provide a substantially continuous arcuate support in a plane normal to a longitudinal axis of the conduit.
19. The floor tool of claim 16 , wherein the conduit comprises a forward portion pivotally attached to a rearward portion, the cleaner head is rotatably attached to the forward portion, and the wheels are rotatably attached to the forward portion.
20. The floor tool of claim 19 , wherein the wheels are attached to the forward portion at a first set of points, and the rearward portion is attached to the forward portion at a second set of points located above the first set of points.