Device for converting a linear movement into a rotary movement

A device for converting a rectilinear movement into a rotary movement, comprising at least one piston-cylinder mechanism (1) having a cylinder (2) and a piston (3) moveably arranged in the cylinder for rectilinear movement, a crankshaft (4) for rotary movement, and a connecting rod (5) connecting the piston and the crankshaft, characterized in that the centre of rotation of the crankshaft is arranged displaced at a distance (F) from the line (10) along which the piston is moveable and that the crankshaft has a direction (14) of rotation so that the part of the crankshaft which in relation to the movement line of the piston is located on the other side of the centre of rotation of the crankshaft, looked at the device in the longitudinal direction of the crankshaft, has a movement component (13) which is parallel with the movement line of the piston and directed away from the cylinder (2).