Abstract: A dual roll vibratory compactor is provided with a single lever control for initiating travel in either direction and then starting the rotation of the eccentric weights to vibrate the rolls. Either or both rolls vibrate at low or high selected frequencies according to travel direction. A mode control switch is provided to provide the desired selections. A switch for reversing the selections is provided to maintain the same selections when the compactor is turned around.

Abstract: An adjustable vibratory roller of the type used for compacting soil, asphalt, etc. A rapidly rotating vibration inducing assembly is provided within the compaction roll. The assembly comprises two weights pivotably mounted on supporting channels and a double-ended, fluid operated hydraulic cylinder connected to the weights to pivot them both simultaneously around their respective axes. The cylinder is pivotably mounted on the supporting channels, and one end of its piston rod is directly connected to one of the weights while the other end of its piston rod is connected to the other weight via a connecting link.