A stand for a device, which is to be movably arranged, has a first stand part and a second stand part, which is movable relative to the first stand part, and which includes a pivot arm, pivotable around a pivot axis (A2) and jointed to the first stand part. An energy storage device is provided, which...http://www.google.es/patents/US6105909?utm_source=gb-gplus-sharePatente US6105909 - Stand with energy storage device for weight equalization
Stand with energy storage device for weight equalization