Abstract: The invention relates to steerable vibration plates that are set vibrating by rotating unbalanced masses. By twisting the unbalanced masses relative to one another the resulting forces and their direction of action can be changed, thereby influencing the travel speed of the vibrating plate and its direction of travel. The inventive vibration plate is characterized in that the unbalanced masses disposed on a common shaft can be adjusted independent of external forces and torques since the adjustment piston adjusting the unbalanced masses is braced in the adjustment cylinder to a much higher degree than would be possible with conventional coil springs. To this end, every adjustable unbalanced mass is associated with a double-action hydraulic cylinder that comprises two liquid chambers. The connection of said chambers to a storage and a pump can be locked in order to fix the piston which can be adjusted within the hydraulic cylinder.

Abstract: The invention relates to a two cycle engine comprising a lean lubrication system, whereby the lubrication oil is only applied in the area of a contact surface between a piston and a cylinder. An oil outlet is provided in or below a running surface pertaining to the cylinder for this purpose. An oil aerosol can be applied alternately, according to the position of the piston, onto the running surface of a shaft pertaining to the piston and onto the running surface of the cylinder via said oil outlet.

Abstract: The invention relates to steerable vibration plates that are set vibrating by rotating unbalanced masses. By twisting the unbalanced masses relative to one another the resulting forces and their direction of action can be changed, thereby influencing the travel speed of the vibrating plate and its direction of travel. The inventive vibration plate is characterized in that the unbalanced masses disposed on a common shaft can be adjusted independent of external forces and torques since the adjustment piston adjusting the unbalanced masses is braced in the adjustment cylinder to a much higher degree than would be possible with conventional coil springs. To this end, every adjustable unbalanced mass is associated with a double-action hydraulic cylinder that comprises two liquid chambers. The connection of said chambers to a storage and a pump can be locked in order to fix the piston which can be adjusted within the hydraulic cylinder.

Abstract: The invention relates to a two cycle engine (1) comprising a lean lubrication system, whereby the lubrication oil is only applied in the area of a contact surface between a piston (3) and a cylinder (2). An oil outlet (12) is provided in or below a running surface (11) pertaining to the cylinder (2) for this purpose. An oil aerosol can be applied alternately, according to the position of the piston (3), onto the running surface of a shaft (9) pertaining to the piston (3) and onto the running surface (11) of the cylinder (2) via said oil outlet.