SHROUD FOR A CLEANING SERVICE APPARATUS
First Claim
Patent Images
1. A surface cleaning apparatus comprising(a) an air flow passage extending from a dirty air inlet to a clean air outlet;
- (b) a dirt collection chamber extending between first and second opposed ends;
(c) a unidirectional flow cyclone positioned in the dirt collection chamber and comprising an air inlet at the first end, an air outlet at the second end and a cyclone chamber wall extending from the first end towards the second end, the cyclone chamber wall having an end face that is spaced from and faces the second end to define a gap between the end face and the second end, the gap comprising a dirt outlet of the cyclone;
(d) a perforated shroud comprising a downstream portion that is positioned between the second end and the end face of the cyclone chamber wall and an upstream portion that is positioned in the cyclone chamber, the upstream portion having a closed end that is distal to the second end; and
,(e) a suction motor positioned in the airflow passage.
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Abstract
A surface cleaning apparatus has a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber. The cyclone chamber has an air inlet and an opposed end. The dirt outlet from the cyclone chamber comprises a gap at the terminal end of a cyclone chamber wall proximate the opposed end. A shroud extends inwardly into the cyclone chamber from the opposed end and is preferably tapered in the upstream direction.
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Citations
21 Claims
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1. A surface cleaning apparatus comprising
(a) an air flow passage extending from a dirty air inlet to a clean air outlet; -
(b) a dirt collection chamber extending between first and second opposed ends; (c) a unidirectional flow cyclone positioned in the dirt collection chamber and comprising an air inlet at the first end, an air outlet at the second end and a cyclone chamber wall extending from the first end towards the second end, the cyclone chamber wall having an end face that is spaced from and faces the second end to define a gap between the end face and the second end, the gap comprising a dirt outlet of the cyclone; (d) a perforated shroud comprising a downstream portion that is positioned between the second end and the end face of the cyclone chamber wall and an upstream portion that is positioned in the cyclone chamber, the upstream portion having a closed end that is distal to the second end; and
,(e) a suction motor positioned in the airflow passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A surface cleaning apparatus comprising
(a) an air flow passage extending from a dirty air inlet to a clean air outlet; -
(b) a cyclone unit positioned in the air flow passage, the cyclone unit comprising at least one cyclone chamber and at least one dirt collection chamber positioned exterior to the cyclone chamber; (c) the cyclone chamber comprising an air inlet at a first end, an air outlet at an opposed second end and a cyclone chamber wall extending from the first end towards the second end, the cyclone chamber wall having an end face that is spaced from and faces the second end; (d) a perforated shroud extending from the air outlet towards the first end; and
,(e) a suction motor positioned in the airflow passage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification