Patent ID: 8585113
Filing Date: 2013-11-19
Classification: B25J

Abstract:
1. A pneumatic gripper comprising: a gripper body with integrated end heads; at least two pneumatic control pistons operating within at least one chamber defined by the gripper body and movable in opposite directions with respect to each other along an axis by means of a driving fluid supplied to said chamber; at least four guide columns associated with each piston and emerging from the ends of the at least one chamber; and at least two jaws or fingers movable with said pistons between an active position for gripping a work-piece and an inactive position for releasing the work-piece, wherein the at least four guide columns are uniformly spaced on a respective control piston about said axis, said guide columns being attached directly in front of the respective control piston and are passed through respective holes formed in a respective end head, and each gripping jaw can be attached directly to the ends of the columns of a relevant control piston, at least one peripheral seal being mounted between each control piston and an internal surface of the chamber in which said control piston is accommodated, at least one seal being mounted between the gripper body and each head thereof, at least one seal being mounted between each guide column and the respective guide hole in the respective head, so as to form a pressurized-air cavity around each guide column in order to prevent dirt or fluids to penetrate into the gripper from the outside.