(19)
(11) EP 2 444 674 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.07.2015 Bulletin 2015/28

(43) Date of publication A2:
25.04.2012 Bulletin 2012/17

(21) Application number: 11186016.9

(22) Date of filing: 20.10.2011
(51) International Patent Classification (IPC): 
F04D 17/08(2006.01)
F04D 29/02(2006.01)
 F04D 29/30(2006.01)
F04D 29/38(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 20.10.2010 GB 201017712

(71) Applicant: Greenwood Air Management Limited
Rustington Sussex BN16 3LF (GB)

(72) Inventors:
  • Rahimi, Darius
    Rustington, West Sussex BN16 3LF (GB)
  • Sweeney, Paul
    Rustington, West Sussex BN16 3LF (GB)
  • Herne, Stephen
    Rustington, West Sussex BN16 3LF (GB)
  • Kearsley, Paul Nicholas
    Littlehampton, West Sussex BN17 7LUF (GB)

(74) Representative: Gardiner, Stephen Robin et al
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) Fan impeller


(57) An impeller for a fan, comprising a hub and a plurality of blades extending from the hub, wherein each blade has a leading edge and a trailing edge and wherein each blade has a first portion made from a rigid material and a second portion formed on the leading edge of the first portion and formed from a resilient material. The impeller increases the safety of the impeller by reducing the potential damage or injury caused by collision with the impeller. Consequently, a fan with such an impeller does not require a protective grill in order to meet safety regulations. The absence of a grill increases the efficiency of the fan and reduces the noise caused by turbulence as air passes through the grill. A method of making the impeller is also provided.







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