A multi-fan assembly whose revolution speed can be controlled by a member fan designed with a reverse rotating structure, which includes a housing in which is provided a rotatable member; a positive-rotation member fan is equipped with a positive-rotation motor, the positive-rotation motor serves to rotate blade holders and fan blades mounted on the blade holders, the positive-rotation member fan is fixed to the rotatable member via a holding arm; a reverse-rotation member fan is equipped with a reverse-rotation motor, the reverse-rotation motor serves to rotate blade holders and fan blades mounted on the blade holders, the reverse-rotation motor's rotating direction is opposite to that of the positive-rotation motor, the reverse-rotation member fan is fixed to the rotatable member via a holding arm.

 
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< Oscillating device for adjusting the displacement of a fluid pump

> Control device for at least one consumer, such as a camshaft adjuster, automatic transmission and the like, of motor vehicles

> Blower having a blower tube incorporating a reduction device for reducing the clear flow cross section of said blower tube at idle operation
~ 00276