Patent ID: 7641155

Claim:
An arrangement for at least partially compensating a load torque acting on a mass body which is supported on a stand unit so as to be rotatable about an axis of rotation in a first direction as a consequence of said load torque, said arrangement comprising: force means for generating a linear force; a converter unit connected to said force means and being for converting said linear force into a compensating torque to counter said load torque; said converter unit defining a moment arm between said linear force and said axis for said compensating torque and said converter unit including an adjusting device for adjusting the length of said moment arm to adjust said compensating torque to a magnitude needed to balance said load torque; an adjustable coupling unit for transmitting said compensating torque between said converter unit and said mass body so as to cause said compensating torque to act in a second direction about said axis of rotation opposite to said first direction to balance said load torque; and, said coupling unit including a latch mechanism for adjusting the phase of a compensating torque transmitted to the mass body.