(19)
(11) EP 0 705 983 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.03.1998 Bulletin 1998/11

(43) Date of publication A2:
10.04.1996 Bulletin 1996/15

(21) Application number: 95202643.3

(22) Date of filing: 02.10.1995
(51) International Patent Classification (IPC)6: F04D 25/12
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 30.09.1994 NL 9401607
12.04.1995 NL 1000137

(71) Applicant: J.E. Stork Ventilatoren B.V.
NL-8401 AM Zwolle (NL)

(72) Inventor:
  • Jansen, Paulus S. W.
    Nl-8291 JD Wapenveld (NL)

(74) Representative: Schumann, Bernard Herman Johan 
Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1
NL-2517 GK Den Haag
NL-2517 GK Den Haag (NL)

   


(54) Roof fan


(57) The invention relates to a fan adapted for placing on the roof of a building. Roof fans are known which blow substantially vertically, while fans are also commercially available which have a substantially horizontal, radial outflow pattern.
The fan according to the invention now has the feature that the fan is constructed such that the air blown to the outside has both a considerable horizontal and a considerable vertical directional component. Due to the angle at which the outflowing air is displaced, ambient air is carried along through so-called "induction". An air flow will for instance be created which travels downward from above in the direction of the fan, is then deflected and carried along by the obliquely blowing air flow. Also occurring along the roof in the direction of the fan is an air flow which will deflect in the vicinity of the fan to be then carried along in the direction of the obliquely blowing air flow.






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