Patent ID: 7975835

Claim:
A shaker conveyor adapted to be mounted on a mechanical press for progressively transferring material such as scrap metal pieces from the press, said conveyor comprising at least one elongated tray supported for generally horizontal reciprocating movement and adapted to receive the material, a drive unit including an electric motor having a motor shaft connected to rotate an input shaft supporting an elliptical input gear having an axis eccentric to an axis of said input shaft, said input gear in continuous mesh with an elliptical output gear eccentrically connected to an output shaft, a rocker arm and link assembly connected to said output shaft eccentrically of an axis of said output shaft to produce oscillation of said rocker arm and said link assembly in response to rotation of said output shaft, and said rocker arm and link assembly connected to said tray to reciprocate said tray and produce rapid acceleration and rapid deceleration at one end of a reciprocating stroke of said tray to effect smooth, continuous and efficient movement of the material on said tray.