Surface cleaning apparatus

Patent metadata

Field	Value
Publication number	US-11717128-B2
Application number	US-202217994646-A
Country	US
Kind code	B2
Filing date	Nov 28, 2022
Priority date	Sep 15, 2017
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A surface cleaning apparatus such as an extractor has a fluid flow path extending from a dirty fluid inlet head to a clean air outlet. The fluid flow path upstream of the separation stage comprises a removable portion.

First claim

The invention claimed is:

1. A surface cleaning apparatus comprising:
(a) an air flow path extending from a dirty fluid inlet to a clean air outlet;
(b) a first treatment stage;
(c) a second treatment stage positioned in the air flow path downstream from the first treatment stage, the second stage having an inlet passage, the second treatment stage comprising a plurality of cyclones, each cyclone having a plurality of air inlets, an air outlet and a dirt outlet, the plurality of air inlets are downstream from the inlet passage; and
(d) a suction motor positioned in the air flow path downstream from the second treatment stage,
wherein, when the surface cleaning apparatus is used to clean a surface, the plurality of inlets and the air outlets of the cyclones are at a lower end of the cyclone and the dirt outlets are at an upper end of the cyclones.

2. The surface cleaning apparatus of claim 1 wherein the plurality of cyclones are laterally positioned beside each other.

3. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter downstream from the second treatment stage and the pre-motor filter underlies the second treatment stage.

4. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter downstream from the second treatment stage and the pre-motor filter is removably positionable in a pre-motor filter housing and the air outlet of the second treatment stage faces an air inlet end of the pre-motor filter housing.

5. The surface cleaning apparatus of claim 1 further comprising a pre-motor filter downstream from the second treatment stage and the pre-motor filter is removably positionable in a pre-motor filter housing and, when the surface cleaning apparatus is positioned on a horizontal surface with an upper end of the air treatment chamber above a lower end of the air treatment chamber, a lower surface of the second treatment stage faces an air inlet end of the pre-motor filter housing.

6. The surface cleaning apparatus of claim 1 wherein the plurality of cyclones is two cyclones.

7. The surface cleaning apparatus of claim 1 wherein each cyclone has a cyclone axis of rotation and a sidewall that extends axially and the dirt outlet of each cyclone comprises an opening in the sidewall.

8. The surface cleaning apparatus of claim 7 wherein each cyclone has a lower end wall and an upper end wall and, for each cyclone, the cyclone axis of rotation extends through the lower end wall and the upper end wall and the upper end wall is an upper end of the opening of that cyclone.

Assignees

• Omachron Intellectual Property Inc

Inventors

• Conrad Wayne Ernest
• Innes Daniel
• Thorne Jason

Classifications

• A47L11/4088 Primary

  Supply pumps; Spraying devices; Supply conduits · CPC title

• A47L5/225

  Convertible suction cleaners, i.e. convertible between different types thereof, e.g. from upright suction cleaners to sledge-type suction cleaners · CPC title

• A47L5/24

  Hand-supported suction cleaners · CPC title

• A47L5/30

  with driven dust-loosening tools, e.g. rotating brushes · CPC title

• A47L5/32

  with means for connecting a hose (hose couplings for suction cleaners A47L9/24) · CPC title