Filter apparatus for a surface cleaning apparatus
AssigneeOmachron Intellectual Property Inc.
InventorsWayne Ernest Conrad, Gordon James Howes, Wenxiu Gao
Life of this patent
Estimating the term…
Abstract
A surface cleaning apparatus having an air flow path from a dirty air inlet to a clean air outlet and including an air treatment member, a suction motor and a filter assembly in the air flow path. The filter assembly includes at least two spaced apart physical filter elements with the upstream face of the second filter facing the downstream face of the first filter element. The filter assembly is configured to prevent air from bypassing the first physical filter media. The filter assembly includes a gap between the first filter element and the second filter element that acts as a header and reduces the flow rate of air incident on the second filter element.
Claims20
A surface cleaning apparatus having an air flow path from a dirty air inlet to a clean air outlet and including an air treatment member, a suction motor and a filter assembly provided in the air flow path, the filter assembly comprising:
- a) a first longitudinally extending annular physical filter media having an upstream face and a downstream face;
- b) a second longitudinally extending annular physical filter media having an upstream face and a downstream face, wherein the upstream face of the second annular physical filter media is positioned interior the first annular physical filter media whereby the upstream face of the second annular physical filter media faces the downstream face of the first annular physical filter media, wherein the first and second longitudinally extending annular physical filter media are discrete elements that are separable from each other;
- and,
- c) a longitudinally extending gap located between the upstream face of the second annular physical filter media and the downstream face of the first annular physical filter media, the gap having first and second longitudinally spaced apart ends wherein the first and second longitudinally spaced apart ends are closed whereby prior to passing through the second longitudinally extending annular physical filter media, air travels through the first longitudinally extending annular physical filter media,
- wherein the first longitudinally extending annular physical filter media is maintained in position with respect to the second longitudinally extending annular physical filter media by a compressive force applied by the first longitudinally extending annular physical filter media when the first longitudinally extending annular physical filter media is positioned overlying the second longitudinally extending annular physical filter media.
A surface cleaning apparatus having an air flow path from a dirty air inlet to a clean air outlet and including an air treatment member, a suction motor and a filter assembly provided in the air flow path, the filter assembly comprising:
- a) a first discrete physical filter media having an upstream face and a downstream face;
- and,
- b) a second discrete physical filter media having an upstream face and a downstream face,
- wherein the first discrete physical filter media extends around the second discrete physical filter media and wherein the filter assembly inhibits air bypassing the first discrete physical filter media as the air travels to the second discrete physical filter media, and
- wherein a compressive force produced by the first and second discrete filter media maintains the first discrete physical filter media in position with respect to the second discrete physical filter media.
Dependencies are inferred from the claim text.