Convertible vacuum-cleaner nozzle

1. A vacuum-cleaner nozzle assembly comprising:

a base nozzle forming a downwardly open suction mouth having a lower edge and of a predetermined horizontal width measured in a direction transverse to a working direction of the base nozzle, the nozzle having a suction connector for aspiration of air up through the mouth;

a first expansion fitting forming a downwardly open suction mouth of a predetermined horizontal width substantially greater than the width of the mouth of the base nozzle, the expansion fitting having an upwardly open seat complementary to and fittable with the lower edge of the base nozzle and a suction port in the seat such that, when the base nozzle is fitted to the seat, aspiration through the base nozzle draws air upward from the suction mouth of the first expansion fitting;

a second expansion fitting forming a downwardly open suction mouth of a predetermined horizontal width substantially greater than the width of the mouth of the first expansion fitting, the expansion fitting having an upwardly open seat fittable with the edge of the base nozzle and a suction port therein such that, when the base nozzle is fitted to the seat of the second expansion fitting, aspiration through the base nozzle draws air upward from the suction mouth of the first expansion fitting; and

rollers on the second expansion fitting for supporting same on a floor.

2. The vacuum-cleaner nozzle assembly defined in claim 1 , wherein the base nozzle is wider in the transverse direction than in the working direction.

3. The vacuum-cleaner nozzle assembly defined in claim 1 , wherein the seat of the first expansion fitting and the seat of the second expansion fitting are identical.

4. The vacuum-cleaner nozzle assembly defined in claim 3 , wherein, each of the seats fits around the edge of the base nozzle in the transverse direction and in the working direction.

5. The vacuum-cleaner nozzle assembly defined in claim 1 , further comprising:

means on each of the fittings for vertically locking the base nozzle in the respective seat.

6. The vacuum-cleaner nozzle assembly defined in claim 5 , wherein the means for vertically locking includes:

at one narrow end of the respective fitting an overhang under which a narrow end of the base nozzle is fittable; and

a latch on an opposite narrow end of the respective fitting movable between a position holding an opposite narrow end of the base nozzle and a position freeing the opposite narrow end of the base nozzle.

7. The vacuum-cleaner nozzle assembly defined in claim 6 , wherein the latch is operable by a foot of a user of the nozzle assembly.

8. The vacuum-cleaner nozzle assembly defined in claim 1 , further comprising:

a transversely extending pile brush on the base nozzle at the edge of the mouth.

9. The vacuum-cleaner nozzle assembly defined in claim 8 , further comprising:

another transversely extending pile brush on each of fittings along the edge of the mouth thereof.

10. The vacuum-cleaner nozzle assembly defined in claim 1 , further comprising:

a seal ring extending peripherally around the seat of each of the fittings engageable with the edge of the base nozzle when fitted with the respective seat.

11. The vacuum-cleaner nozzle assembly defined in claim 1 , wherein the connector is a short tube extending rearward and upward from the body.

12. The vacuum-cleaner nozzle assembly defined in claim 11 , wherein the tube has a swivelable end.

13. The vacuum-cleaner nozzle assembly defined in claim 1 , further comprising:

an alternative base nozzle connectable to the seat of the first and/or of the second expansion fitting.

14. The vacuum-cleaner nozzle assembly defined in claim 13 , wherein the alternative base nozzle has a body identical to the base nozzle and a different connector.