Multistage cyclone and surface cleaning apparatus having same
First Claim
1. A vacuum cleaner comprising:
- (a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber;
(b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, wherein the second stage air inlet comprises a directing member and a second stage air inlet port;
(c) a screen positioned laterally outwardly from the second stage cyclone;
(d) passage positioned between an inner side of the screen and the outer wall of the second stage cyclone wherein air exiting the first stage cyclone enters the passage and flow towards the second stage cyclone air inlet port; and
,wherein the directing member has, in the rotational direction, a directing surface facing towards the flow of air in the passage, the directing surface extending from an upstream end located in the passage and a downstream end located proximate the second stage cyclone air inlet port wherein the directing surface extends generally linearly.
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Accused Products
Abstract
A hand vacuum cleaner may have a first stage cyclone having a first stage cyclone chamber and a second stage cyclone downstream from the first stage cyclone and at least substantially nested in the first stage cyclone. A screen is positioned laterally outwardly from the second stage cyclone and defines a passage positioned between an inner side of the screen and the outer wall of the second stage cyclone. A directing member is located in the passage, the directing member having, in the rotational direction, a directing surface facing towards the flow of air in the passage, the directing surface extending from an upstream end located in the passage and a downstream end located proximate the second stage cyclone air inlet port wherein the directing surface extends generally linearly.
157 Citations
22 Claims
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1. A vacuum cleaner comprising:
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(a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber; (b) a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a second stage cyclone chamber, a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage longitudinal cyclone axis about which the air rotates in the second stage cyclone chamber, wherein the second stage air inlet comprises a directing member and a second stage air inlet port; (c) a screen positioned laterally outwardly from the second stage cyclone; (d) passage positioned between an inner side of the screen and the outer wall of the second stage cyclone wherein air exiting the first stage cyclone enters the passage and flow towards the second stage cyclone air inlet port; and
,wherein the directing member has, in the rotational direction, a directing surface facing towards the flow of air in the passage, the directing surface extending from an upstream end located in the passage and a downstream end located proximate the second stage cyclone air inlet port wherein the directing surface extends generally linearly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vacuum cleaner comprising:
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(a) a cyclone chamber having a cyclone air inlet port provided in a sidewall of the cyclone chamber, a cyclone air outlet and a longitudinal cyclone axis about which the air rotates in the cyclone chamber in a rotational direction; (b) an air inlet passage having inner and outer passage walls which extend axially along the cyclone, the passage having a width between the inner and outer passage walls in a direction transverse to cyclone axis; and
,(c) a directing member located in the air inlet passage, the directing member having a directing surface facing towards the flow of air in the air inlet passage the directing member having, in the rotational direction, an upstream end located in the air inlet passage and a downstream end located proximate the cyclone air inlet port wherein the directing surface extends generally linearly wherein the inner passage wall is a sidewall of the cyclone chamber and the outer passage wall comprises a screen. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification