Patent ID: 6860477

Claim:
A clamping device for retaining a draw-in bolt ( 11 ) comprising: a receptacle ( 10 ) into which the draw-in bolt ( 11 ) is insertable; a clamping mechanism disposed within said receptacle ( 10 ) for retaining the draw-in bolt ( 11 ) therein, said clamping mechanism having a collet chuck having several clamping tongues ( 13 ), each of said tongues having a first end retained on a holding element ( 14 ) disposed and free floating within said receptacle ( 10 ) and a second end radially movable between an inner clamping position and an outer release position, said holding element and said clamping tongues axially displaceable and disposed within said receptacle with radial clearance; a piston ( 5 ) operably associated with said clamping mechanism and movable between a first position and a second position, said first position causing said second end to be in said release position, and said second position causing said second end to be in said clamping position, the draw-in-bolt lockable in said receptacle ( 10 ) when said second end is in said clamping position.