| 摘要 |
An apparatus, an adjustable tool with variable diameter aimed at tightening and twisting nuts, bolts or other prismatic objects, with polygonal section or circular section outlines suitable for performing several actions around different kinds of objects, working on such objects through two different ways to move a variable number of teeth, which, while working, close like a diaphragm around the sides of such objects, perfectly adapting to their diameter and their section or capacity. |
| 主权项 |
1. A gripping device comprising:
a group of teeth; two parallel planes designed to encircle a group of teeth, said planes being orthogonal and counter-rotating with respect to a common axis;means of interference aimed at cooperating with said planes in order to provide the condition for gripping the device, wherein the group of teeth is movable in a centripetal direction with respect to the axis, and an opening condition, wherein the group of teeth is movable in a centrifugal direction with respect to the axis,whereineach tooth is set radially with respect to the axis and comprises a first and a second plane orthogonal to said parallel planes, said first and second surfaces orthogonal converging to a common corner and defining an included angle measuring the fraction of a round angle divided by the number of the teeth,each tooth slides with a first orthogonal surface in parallel to the second orthogonal surface of a preceding tooth and with the second orthogonal surface in parallel to the first orthogonal surface of a following tooth, in order that each tooth moves amid three constraints with a specific coplanar, rotating and radial movement,from each of said two parallel planes corresponding levers branch off, connected to one another in a fulcrum provided with elastic means of counter-action aimed at keeping the levers apart once the device is open,and wherein such fulcrum is designed to cooperate with a bilateral lever and blocks such levers in a plurality of gripping positions, each corresponding to a different approach of such levers. |
