Multistage cyclone and surface cleaning apparatus having same

  • US 10,271,704 B2
  • Filed: 12/27/2016
  • Issued: 04/30/2019
  • Est. Priority Date: 12/27/2016
  • Status: Active Grant
First Claim
Patent Images

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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