The invention relates to surfaces for the movement of a medium (suction and expulsion) with a hub (1) and blades (3) arranged around the hub (1). The cross-section of said blades (3) is meant to be curved so that it is S-shaped or sinusoidal with two apexes (4).
申请公布号
WO9740260(A1)
申请公布日期
1997.10.30
申请号
WO1997EP01957
申请日期
1997.04.18
申请人
VITARA TRADING COMPANY LTD.;HILDEBRANDT, JOHN, F.;MAERLANDER, THOMAS
