Abstract: A device for use with a hinge in which two rigid elements (104, 105) may be placed in various relative angular positions, wherein the elongate part (109) to be protected and guided consists of a section or tube inserted through two mutually facing channels (111, 110) in respective ones of the rigid elements (104, 105). The device includes a movable member (107) arranged between said rigid elements (104, 105) and at least rotatably movable about a rotational axis of said hinge. The member further includes a hole (108) through which said elongate part (109) may inserted.

Abstract: A drive unit capable of being coupled to a wheeled body to form a vehicle. The drive unit includes a construction having a frame with two opposite edges parallel to the forward direction, the frame supports a driving power source and is in turn supported along said opposite edges by a pair of side walls that are respectively supported on at least one wheel-like member and define a housing for transmission connecting the driving power source to the wheel-like members, each of the side walls has two opposite surfaces perpendicular to the forward direction, and coupling/un-coupling devices provided on the surfaces for releasably engaging the wheeled body.