Patent ID: 7392897

Claim:
A vibrational linear conveyor for conveying workpieces and powdery or granular materials, comprising: an oscillation system; a useful mass and a counter mass being mounted separately on said oscillation system, the useful mass and the counter mass being disposed essentially one above the other and being arranged symmetrically on either side of a vertical central plane, respective centers of gravity of the useful mass and the counter mass lying on a common line of action; an electromagnetic exciter element comprising a magnet coil and a magnet armature each which comprises a portion of the useful mass or the counter mass, said electromagnetic exciter element imparting an opposite oscillatory or vibratory movement to said useful mass and said counter mass; and variously configured trough-shaped conveying elements each, in combination with at least one element-specific additional mass carried thereon, collectively defining an integrated conveying unit, each said integrated conveying unit being interchangeably fastenable on said oscillation system so as to comprise a portion of said useful mass, each said integrated conveying unit having a predetermined weight such that a total weight of the useful mass is equalized with that of the counter mass when the integrated conveying unit is fastened on said oscillation system, said at least one additional mass being disposed in a position along each of said conveying elements such that a position of the center of gravity of the useful mass remains essentially the same when one said integrated conveying unit is replaced by another said integrated conveying unit.