Patent ID: 6155404
Filing Date: 2000-12-05
Classification: B65G

Abstract:
A two-way drive connectable to a feeder bed for vibrating said feeder bed in a substantially horizontal direction, comprising:first and second drive shafts having first and second axes of rotation, respectively;means interconnecting said first and second drive shafts for rotation of the second drive shaft at a speed which is a selected ratio of the speed of rotation of the first drive shaft, said selected ratio being at least 2:1;reversible means for rotatably driving one of said first and second drive shafts;a first eccentric weight rotatably secured to the first drive shaft, said first eccentric weight having a center of gravity at a first selected radial distance from the first axis of rotation;a second eccentric weight rotatably secured to the second drive shaft, said second eccentric weight having a center of gravity at a second selected radial distance from the second axis of rotation, said second eccentric weight having a first position on a first shaft radius when said second shaft is driven in one direction and a second position on a second shaft radius when the second shaft is driven in the reverse direction, said first shaft radius being spaced from said second shaft radius wherebysaid second eccentric weight in said first position is aligned with said first eccentric weight in one concurrent rotational position on one horizontal side of said drive shafts to provide a maximum force in one substantially horizontal direction when said shafts are driven in said one direction, andsaid second eccentric weight in said second position is aligned with said first eccentric weight in an opposite concurrent rotational position on the horizontal side opposite the one horizontal side of said drive shafts to provide a maximum force in an opposite substantially horizontal direction when said shafts are driven in said reverse direction.