Device and method for transferring rotational power and method of using same

A multi-link transmission gear for transmitting a rotational power from an input shaft to an output shaft, the rotational power is provided to the input shaft by a rotational power source, the multi-link transmission gear comprising:

• a first link comprising a first gear and a second gear, wherein the first gear of the first link is rotatably supported by the first link and is adapted to be powered by the input shaft, and wherein the second gear of the first link is rotatably supported by the first link and is adapted to receive a rotational movement from the first gear of the first link;
• a second link comprising a first gear and a second gear, wherein the first gear of the second link is rotatably supported by the second link and is rotatable by the first gear of the first link, and wherein the second gear of the second link is rotatably supported by the second link and is rotatable by the first gear of the second link to provide the rotational power to the output shaft;
• wherein the first link and the second link have a common axis adapted to allow the first link and the second link to rotate freely about the common axis and thus to allow a change of an angle between the first link and the second link and thereby to change a distance between the input shaft and the output shaft;
• and
• at least one additional link, each of the at least one additional link comprising:
• a first gear and a second gear,
• wherein the first gear of each of the at least one additional link is adapted to be rotated by a second gear of one of one or more neighbor links, and
• wherein each of the at least one additional link is adapted to rotate about a common axis with one of the one or more neighbor links.