Abstract: A hydraulic vibrator for moving a ramming or drawing body or the like has a hydraulic working cylinder, a double-acting working piston axially movable in the hydraulic working cylinder, and a device for supplying a working medium into the hydraulic working cylinder, alternately at both axial sides of the working piston so that the working piston vibrates with selectively variable frequency and displaces the ramming and drawing body or the like.

Abstract: A suspension apparatus is provided for interposition between a support structure, such as a crane, and a vibratory device, such as a vibratory ram. The apparatus includes a sling element having two first ends spaced apart in the direction of pull, with one of the first ends suspended from the support structure and the other first end holding the vibratory device. The sling element also has two second ends, which second ends are spaced apart in a direction transverse of the pulling direction. A resiliently distortable damping element is interposed between the two second ends, and serves to dampen oscillations produced when the suspension apparatus is subjected to vibratory loading of the first ends.