Surface cleaning apparatus

1. A surface cleaning apparatus comprising:

(a) a cyclone chamber having an upper end having an upper end wall, a lower end having a lower end wall and a lower openable end, an air inlet in the lower end, an air outlet, a dirt outlet in the upper end and a sidewall, wherein the sidewall and the lower end wall meet at a juncture having a curved juncture surface, and the curved juncture surface extends at an angle to the lower end wall and the sidewall, and wherein the lower openable end comprises the lower end wall and at least a portion of the juncture surface;

(b) a dirt collection chamber in communication with the dirt outlet and positioned exterior to the cyclone chamber; and,

(c) an air flow path extending from a dirty air inlet to a clean air outlet and including a suction motor and the cyclone chamber.

2. The surface cleaning apparatus of claim 1 wherein the dirt collection chamber is positioned adjacent to the sidewall of the cyclone chamber.

3. The surface cleaning apparatus of claim 1 wherein the dirt collection chamber is laterally spaced from the cyclone chamber.

4. The surface cleaning apparatus of claim 3 wherein the dirt collection chamber is openable with the cyclone chamber.

5. The surface cleaning apparatus of claim 1 wherein the juncture surface is rounded.

6. The surface cleaning apparatus of claim 1 wherein the air outlet is configured so that air exits the cyclone chamber through the upper end.

7. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter and a pre-motor filter dirt chamber, and the pre-motor filter dirt chamber is openable.

8. The surface cleaning apparatus of claim 7 wherein the pre-motor filter dirt chamber is openable with the dirt collection chamber.

9. The surface cleaning apparatus of claim 7 wherein the pre-motor filter dirt chamber is openable with the cyclone chamber.

10. The surface cleaning apparatus of claim 9 wherein the pre-motor filter dirt chamber is also openable with the dirt collection chamber.

11. The surface cleaning apparatus of claim 7 further comprising an agitation member operatively connected to the pre-motor filter.

12. The surface cleaning apparatus of claim 11 wherein the agitation member is actuated when the pre-motor filter dirt chamber is opened.

13. The surface cleaning apparatus of claim 7 further comprising an agitation member operatively connected to the pre-motor filter wherein the pre-motor filter dirt chamber is removable from the surface cleaning apparatus and the agitation member is actuated when the pre-motor filter dirt chamber is removed from the surface cleaning apparatus.

14. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter and a pre-motor filter dirt chamber, and the pre-motor filter dirt chamber is removable from the surface cleaning apparatus with the dirt collection chamber.

15. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter and a pre-motor filter dirt chamber, and the pre-motor filter dirt chamber is removable from the surface cleaning apparatus with the cyclone chamber.

16. The surface cleaning apparatus of claim 1 wherein the cyclone chamber has a longitudinal axis and the lower end wall is arcuate in longitudinal section.

17. The surface cleaning apparatus of claim 1 further comprising a central member that extends inwardly to the cyclone chamber from the lower end wall and is part of the lower openable end.

18. A surface cleaning apparatus comprising:

(a) a cyclone chamber having an upper end having an upper end wall, a lower end having a lower end wall and a lower openable end, an air inlet in the lower end, an air outlet, a dirt outlet in the upper end and a sidewall, wherein the sidewall and the lower end wall meet at a juncture surface and the juncture surface extends at an angle to the lower end wall and the sidewall, wherein the lower openable end comprises the lower end wall and at least a portion of the juncture;

(b) a pre-motor filter positioned above the upper end;

(c) a dirt collection chamber in communication with the dirt outlet and positioned exterior to the cyclone chamber; and,

(d) an air flow path extending from a dirt air inlet to a clean air outlet and including a suction motor and the cyclone chamber.

19. The surface cleaning apparatus of claim 18 wherein the pre-motor filter overlies the cyclone chamber and the dirt collection chamber.

20. A surface cleaning apparatus comprising:

(a) a cyclone chamber having an upper end having an upper end wall, a lower end having a lower end wall and a lower openable end, an air inlet in the lower end, an air outlet, a dirt outlet in the upper end and a sidewall, wherein the sidewall and the lower end wall meet at a juncture having a juncture surface, and the juncture surface extends at an angle to the lower end wall and the sidewall, wherein the lower openable end comprises the lower end wall and at least a portion of the juncture surface;

(b) a dirt collection chamber in communication with the dirt outlet and positioned exterior to the cyclone chamber;

(c) a pre-motor filter and a pre-motor filter dirt chamber, and the pre-motor filter dirt chamber is removable from the surface cleaning apparatus with the dirt collection chamber and the pre-motor filter dirt chamber is removable from the surface cleaning apparatus with the cyclone chamber and,

(d) an air flow path extending from a dirty air inlet to a clean air outlet and including a suction motor, the pre-motor filter chamber and the cyclone chamber.