Patent ID: 7520495

Claim:
A rapid-action coupling cylinder comprising: a guiding device which controls insertion of a pull-in nipple ( 2 ) fixed to the underside of a workpiece pallet ( 19 ) into a central receiving aperture in a housing ( 11 ) of the rapid-action coupling cylinder ( 1 ), wherein a front face on a free end of the pull-in nipple ( 2 ) has, in the direction of insertion, a conical bevel ( 17 ) that is beveled toward the rear, which cooperates with an associated and oppositely beveled conical receptacle ( 18 ) in the housing ( 11 ); wherein an inner beveled circumference of the receiving aperture ( 4 ) on a cover of the housing ( 11 ) has an inlet radius ( 102 ) that engages the conical bevel ( 17 ) and guides the pull-in nipple ( 2 ) into the conical receptacle ( 18 ), and wherein the conical receptacle ( 18 ) is formed by a upper ball bearing cup ( 8 ) and a lower spring support ( 9 ).