MULTISTAGE CYCLONE AND SURFACE CLEANING APPARATUS HAVING SAME

  • US 20180177353A1
  • Filed: 12/27/2016
  • Published: 06/28/2018
  • Est. Priority Date: 12/27/2016
  • Status: Active Grant
First Claim
Patent Images

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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