Patent ID: 9629511
Date: 2017-04-25
CPC Classifications: A47L,B01D,B04C

Claim:
1. A surface cleaning apparatus comprising: a) an airflow passage extending from a dirty air inlet to a clean air outlet and including a suction motor; b) a cyclone chamber including a first cyclone end, a second cyclone end spaced apart from the first cyclone end in an axial direction and a cyclone sidewall extending between the first and second cyclone ends, the cyclone chamber comprising a dirt outlet, a cyclone air inlet and a cyclone air outlet, the dirt outlet comprising a space between the cyclone sidewall and the first cyclone end and having an outlet height in the axial direction; c) an outer chamber defined between the cyclone chamber sidewall and including a radial outer sidewall that is spaced laterally outwardly from the cyclone chamber sidewall in a lateral direction that is substantially orthogonal to the axial direction, having an axial height that is equal to or greater than the entire outlet height and faces a portion of the cyclone chamber sidewall, that has the dirt outlet such that air flows from the cyclone chamber to the outer chamber and the radial outer wall having a diameter in the lateral direction; d) a dirt collection chamber external the cyclone chamber in communication with the outer chamber, the dirt collection chamber comprising a radial outer wall having an inner surface that at least partially bounds an interior of the dirt collection chamber and has a height in the axial direction, the radial outer wall having a larger diameter than the diameter of the radial outer wall of the outer chamber, the radial outer wall of the dirt collection chamber being substantially parallel to the radial outer sidewall of the outer chamber, the outer chamber and the dirt collection chamber defining a contiguous volume that is in communication with the dirt outlet; and, (e) a transition wall disposed axially between the radial outer wall of the outer chamber and the radial outer wall of the dirt collection chamber, directly connecting the radial outer wall of the outer chamber to the radial outer wall of the dirt collection chamber, forming part of an inner surface of the contiguous volume and being inclined at an oblique angle relative to the radial outer wall of the outer chamber and the radial outer wall of the dirt collection chamber and wherein the transition wall provides a change of an outermost diameter of a cross-sectional area of the contiguous volume.