Patent ID: 9161667
Filing Date: 2015-10-20
Classification: A47L,B01D

Abstract:
1. A portable vacuum cleaner arrangement: an electric power vacuum cleaner comprising a container; a filter kit located within the container, the filter kit comprising: a flexible fabric filter which is stretchable to a stretched position and which may be relaxed to a relaxed position, wherein the fabric filter has an open top, a closed bottom and a wall between the open top and the closed bottom, wherein the flexible fabric filter is located within the container during the relaxed position and the stretched position and, a filter cage having an attachment mechanism configured to be attached to an outlet of the electric power vacuum cleaner, wherein the filter cage comprises a cage wall, interstices disposed along the cage wall and an open bottom; the flexible fabric filter is secured to the cage such that in the relaxed position a first portion of the fabric filter wall covers the entire outer surface of the cage wall while a second portion of the fabric filter wall located at the bottom of the fabric filter comprises an overhang which loosely hangs from the bottom of the cage such that the fabric filter has at least 50% surplus of surface area compared with a surface area of the cage wall when measured including the cage wall interstices; wherein when the electric power vacuum cleaner is operating, said flexible fabric filter is in the stretched position such that the overhang is sucked into the open bottom of the cage such that the overhang covers at least half the length of the cage while the first portion of the fabric filter wall covers an outer surface of the filter cage, and wherein when said electric power vacuum cleaner is subsequently not operating, said flexible fabric filter relaxes, and the overhang returns to the relaxed position and the surface area of the flexible fabric filter contracts to be self-cleaning, said contracting causing a portion of said dust and debris to fall from said flexible fabric filter.