Abstract: An apparatus for compaction of soil and asphalt includes a first mass, such as a compaction drum, or vibrating plate, a second mass configured to oscillate vertically and an unbalanced shaft configured to vibrate the first and second masses. Wherein removable masses can be added and removed from the second mass, in order to enable resonance vibration of the first and second masses, thereby doubling and even tripling the compaction forces applied to the surface being compacted.

Abstract: The invention concerns an arrangement for providing a pulsing compressive force for soil compaction devices. It comprises a first mass (1), which provides a contact surface (2) for transferring the pulsing compressive force onto the ground surface (3) to be compacted, as well as a second mass (4), which via a spring-damper-system (5, 6) is coupled to the first mass (1) to form a vibrating system (1, 4, 5, 6). Further, it comprises an unbalance exciter (7) by means of which the vibrating system (1, 4, 5, 6) can be excited to vibrate. The second mass (4) in doing so exerts in the static state via the first spring-damper-system (5, 6) a static force in direction of gravity (S1) on the first mass (1).