Abstract: A linkage and motion system pivoted to a bracket comprises a first linkage connecting the bracket with a second linkage, a holder connected to the bracket and to the second linkage, and a drive with a linear working motion connected to the bracket. The articulated connection of the drive to the bracket is spaced from that of the holder thereto, the articulated connections of the second linkage to the holder, the first linkage and the drive define a triangle, and the articulated connection of the first linkage to the bracket and that of the drive thereto are on either side of the articulated connection of the holder to the bracket.

Abstract: The invention disclosed relates to a new improved pivoting axle system especially useful for terrain vehicles.

Abstract: A percussion tool is hydraulically operated by a piston whose stroke is controlled by a spring biased valve. A pressure accumulator is connected to the working pressure chamber of a hydraulic cylinder and receives pressure therefrom during the return stroke of the piston while discharging pressure during the working stroke. A piston is displaceably mounted in the pressure accumulator for movement into an end position when the pressure is discharged and a second valve is actuated by the piston in the end position to control the spring biased valve.The invention refers to an improvement in hydraulic percussion tools.Hydraulic percussion tools, for rock drilling, breaking or the like of known construction have a reciprocating working piston in a cylinder, driven by a pressure liquid, usually hydraulic oil, during the reciprocating movement.