Title:
A FAN
Document Type and Number:
WIPO Patent Application WO2006131735
Kind Code:
A9
Abstract:
The invention provides a fan having a beam (10), a first set of blades (20) mounted about a first axis (22) towards a first end of the beam, a second set of blades (30) mounted about a second axis (32) towards a second end of the beam (10), and at least one drive (40) for powering the first and second sets of blades (20, 30) in order to rotate the first and second sets of blades (20, 30) about the first and second axes (22, 32) respectively; wherein the beam is caused to rotate about a third axis (12). Because of the rotation of the beam in addition to that of the sets of blades, such a fan generates air flow over the area of a circle with a diameter equal to the maximum distance between blade tips of the first and second sets of blades. Such an area is significantly larger than that of the two sets of blades alone and is advantageous because air flow can be generated and consequently felt over a larger area.
Inventors:
DYSON JACOB (GB)
Application Number:
PCT/GB2006/002088
Publication Date:
July 19, 2007
Filing Date:
June 07, 2006
Export Citation:
Assignee:
DYSON TECHNOLOGY LTD (GB)
DYSON JACOB (GB)
DYSON JACOB (GB)
International Classes:
F04B17/00; F04D25/08; F04D29/10
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