Patent ID: 7726676

Claim:
A device for hand-driven operation of a guided wheel (R) which is arranged on a steering gear ( 1 ) and which is pivotable about a steering axis (L) oriented perpendicularly with respect to the axis of rotation (D) of the guided wheel, with a first handle ( 20 ), a first coupling means ( 21 ) arranged on the first handle ( 20 ), a second handle ( 22 ), a second coupling means ( 23 ) arranged on the second handle ( 22 ), a guide means ( 2 ), pivotable about the steering axis (L) and cooperating mechanically with the steering gear ( 1 ), for the movable mounting of the handles ( 20 ; 22 ), and a force transmission train ( 3 ), coupled to the first and to the second coupling means via coupling points so as to transmit tractive force, for transmitting a movement of the handles ( 20 , 22 ) to a drive means ( 4 ) which cooperates with the hub (N) of the guided wheel (R) and which converts the movement of the handles ( 20 , 22 ) into a rotational movement of the guided wheel (R), the guide means ( 2 ) having a mechanical positive guidance of the handles ( 20 , 22 ) in such a way that the handles ( 20 , 22 ) can only be moved mirror-symmetrically with respect to a steering plane of symmetry in which the steering axis (L) lies and which is oriented perpendicularly to the axis of rotation (D) of the guided wheel (R), wherein the force transmission train ( 3 ) extends from the first coupling means ( 21 ) via deflection elements ( 35 , 36 , 37 , 38 ), which cause a change in the direction of extent of the force transmission train ( 3 ), in a first force transmission portion ( 30 ), to the drive means ( 4 ) and from the drive means ( 4 ), via deflection elements ( 35 , 36 , 37 , 38 ) which cause a change in the direction of extent of the force transmission train ( 3 ), in a second force transmission portion ( 31 ), to the second coupling means ( 23 ), in such a way that the coupling means ( 21 , 23 ) move the coupling points of the force transmission train ( 3 ) on essentially rectilinear drive paths approaching and absenting of the steering plane of symmetry.