Patent ID: 8657220

Claim:
Device for accelerating particle material with a rotor comprising: a housing ( 135 ) that is provided with a lid member ( 137 )( 138 ), at least a shaft ( 140 ) that carries a rotor ( 139 ) ( 25 ) of open type, such that the rotor ( 139 )( 25 ) is rotatable about an essentially vertically directed axis of rotation ( 0 ) in at least one direction and a metering member ( 141 ) that is provided with an essentially circular metering opening ( 163 ), the outer edge ( 164 ) of which metering opening ( 163 ) is positioned at a location essentially central above the rotor ( 139 ) such that the centre point ( 165 ) of the metering opening ( 163 ) coincides essentially with the axis of rotation ( 0 ), for metering the material on the centre space ( 1420 ) of the rotor ( 139 )( 25 ), at least one acceleration unit that is carried by the rotor ( 139 )( 25 ) at a position a distance away from the axis of rotation ( 0 ) and consists out of at least one sliding member ( 143 )( 26 ) that is provided with a sliding face ( 145 ( 39 )) that stretches into the direction of the outer boarder ( 144 ) of the rotor ( 139 )( 25 ) between an inner face ( 146 )( 27 ) that is directed towards the axis of rotation ( 0 ) where the metered material is collected for accelerating along the sliding face ( 145 )( 39 ) by centrifugal force and an outside face ( 147 )( 42 ) that is directed towards the surrounding housing ( 135 ) from where the accelerated material is thrown from the sliding face ( 145 )( 39 ), which inner face ( 146 )( 27 ) stretches in vertical direction between a bottom edge ( 148 )( 29 ) and a top edge ( 149 )( 30 ), characterized in that: the inner face ( 27 ) is positioned essentially behind the straight plane ( 28 ) or line with on it the bottom edge ( 29 ) and the top edge ( 30 ), such that part of the inner face ( 27 ) is positioned at a greater radial distance from the axis of rotation ( 0 ) than the straight plane ( 28 ) and a closed inner space ( 31 ) is created between the straight plane ( 28 ) and the inner face ( 27 ).