MULTISTAGE CYCLONE AND SURFACE CLEANING APPARATUS HAVING SAME
First Claim
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1. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
- (a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis;
(b) a second stage cyclone downstream from the first stage cyclone and at least substantially nested in 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, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis; and
,(c) a screen positioned laterally outwardly from the second stage cyclone and defining a passage positioned between an inner side of the screen and the outer wall of the second stage cyclone, the screen extending axially at least about 70% of a length of the second stage cyclone chamber.
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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. The screen extends axially at least about 70% of a length of the second stage cyclone chamber.
2 Citations
18 Claims
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1. A hand vacuum cleaner having a front end and a rear end, the hand vacuum cleaner comprising:
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(a) a first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in the first stage cyclone chamber, the first stage cyclone chamber having a length in a direction of the first stage longitudinal cyclone axis; (b) a second stage cyclone downstream from the first stage cyclone and at least substantially nested in 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, the second stage cyclone chamber having a length in a direction of the second stage longitudinal cyclone axis; and
,(c) a screen positioned laterally outwardly from the second stage cyclone and defining a passage positioned between an inner side of the screen and the outer wall of the second stage cyclone, the screen extending axially at least about 70% of a length of the second stage cyclone chamber. - 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 first stage cyclone having a first stage cyclone chamber, a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage longitudinal cyclone axis about which the air rotates in a rotational direction in the first stage cyclone chamber; (b) a second stage cyclone downstream from the first stage cyclone and at least substantially nested in 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; and
,(c) a screen positioned laterally outwardly from the second stage cyclone and defining a passage positioned between an inner side of the screen and the outer wall of the second stage cyclone wherein the second stage cyclone air inlet is located at an end of the passage and directs air into the second stage cyclone chamber in the rotational direction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification