US Patent 7293812 Power driven gripping device with various cross-sections

A gripping device has a holder, two gripping elements movable relative to one another between an inoperative position in which the gripping elements are distal from one another and an operative position in which the gripping elements are proximal to one another so as to grip an object located between them, two first and two second connecting elements each connecting a respective one of the gripping elements to the holder, each of the connecting element having a first end connected to the holder pivotally and connected with a respective one of the gripping elements pivotally, so that each of the gripping elements is turned about two axes to move between the operative and the inoperative positions.