Patent ID: 8123234
Filing Date: 2012-02-28
Classification: B23B,B25B,B25J,Y10T

Abstract:
1. A chuck apparatus for gripping a workpiece by means of an openable/closable gripping mechanism, said chuck apparatus comprising: a body having a pair of ports for supplying a pressure fluid, said body including a piston installed internally therein, which is displaceable in an axial direction under action of said pressure fluid supplied through said ports; a driving section connected to said body and which is driven and rotated by an electric signal; and a gripping mechanism having a pair of first gripping sections and a pair of second gripping sections, said pair of first gripping sections being connected to said piston and being openable and closable under a displacement action of said piston, and said pair of second gripping sections being openable and closable under a driving action of said driving section so as to be opened and closed in directions perpendicular to opening and closing directions of said first gripping sections.