Thursday, January 23, 2014

Oh, patents! The bladeless Dyson fan

Copyright © Françoise Herrmann

Hot! Hot! Hot! You have probably seen those very elegant bladeless Dyson fans called air-multipliers.  There are in fact many patents associated with this brilliant invention. The Dyson bladeless fan produces a gentle airflow, with none of the choppiness and turbulence associated with blades. It is both safe (you can stick your hand straight through the hoop generating the airflow), and very energy efficient (at 40 watts compared to 2500 watts for an air conditioner).  

Dyson patents, associated with the air-multiplier bladeless fan, cover the special components of the fan: the nozzle and airflow system (GB2452490), the tilting mechanism (GB2468315), the adjustable surface for control of airflow (GB2486749), air changing means (GB2493231), as well as variations of the assembly and fan, such as a ceiling mounted bladeless fan (WO2012085527) or a bladeless fan for including ionizer (GB24999041), a bladeless fan with electrostatic precipitator (GB2499044), a bladeless fan with removable nozzle (GB2500008), a bladeless fan with a tapering nozzle (GB2496464), plus more patented variations and components.

Below you will find the Abstract for one of the bladeless fan patents, GB2502106, titled Bladeless fan, a patent drawing of the fan, and an image of the marketed product. A 3-minute YouTube video of Sir James Dyson explaining his air-multiplying invention is also included. 

Abstract GB2502106

A fan for generating an air current includes a body 12 having an air inlet 14, and a nozzle 18 connected to the body. The nozzle includes an interior passage 42 and an air outlet 20 from which the air flow is emitted from the fan. The interior passage extends about an opening or bore 32 through which air from outside the nozzle is drawn by air emitted from the air outlet. The body includes a duct 60 having a first end defining an air inlet 62 of the duct and a second end located opposite to the first end and defining an air outlet 64 of the duct, an impeller 70 is located within the duct for drawing the air flow through the duct, and a motor 94 for driving the impeller. A diffuser section of the duct is annular in shape and converges towards the outlet end of the diffuser. The cross-sectional area of the diffuser varies along the diffuser section by no more than 20% of the crosssectional area of the air flow path at the inlet of the diffuser.


NB.  Errata:  Sir James Dyson was knighted in Great Britain according to the Queen’s 2006 New Year’s Honours List, which explains the honorary form of address “Sir” in this post, and errata in my previous posts concerning Dyson inventions.

For a biographical note: Sir James Dyson trained as an artist prior to training as an engineer. His first invention “the ballbarrow” is reviewed in Patents on the soles of your shoes on 3/23/2013 in a post titled: Oh, patents! The Ballbarrow. His famous wind tunnel vacuum cleaner came four and half years later after 5,127 prototypes! The secret of the Dyson design and Dyson engineering firm, valued at 1 billion dollars, according to Sir James Dyson, in a BBC News article: (Dec. 2006) is:  “Making things people want to buy”.

That’s for sure!...



- Oh, patents! The Ballbarrow. Patents on the soles of your shoes - March, 23, 2013
- Sir James Dyson explains his bladeless fan. Youtube
- Knighthood for Dyson entrepreneur. BBC News – Dec. 30, 2006.

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