Coupling arrangement

A coupling arrangement for connection between a first rotatable shaft and a second rotatable shaft, the coupling arrangement comprising:

• a first rotatable portion connectable to the first rotatable shaft;
• a first reciprocating element mechanically connected to the first rotatable portion at a first interconnecting portion for transforming a rotating motion from the first rotatable portion to a linear motion of the first reciprocating element;
• a second rotatable portion connectable to the second rotatable shaft;
• a second reciprocating element mechanically connected to the second rotatable portion at a second interconnecting portion for transforming a linear motion from the second reciprocating element to a rotating motion of the second rotatable portion;
• and
• a connecting element rotatably connected to each of the first reciprocating element and the second reciprocating element for allowing a relative rotation between the connecting element and the first and second reciprocating elements, respectively,
• wherein the first interconnecting portion comprises a first elongated groove and a first pin, the first pin being slidable between end portions of the first elongated groove, wherein the first pin is eccentrically connected to the first rotatable portion, and wherein the first elongated groove is connected to the first reciprocating element.