Patent ID: 7431308

Claim:
Tool-holding chuck for equipping a rotating machine, comprising: a body having an axis and including a rear part intended to be fixed to a driver shaft of the machine and a front part in which forward-converging housings are formed; jaws each mounted slidably in a housing of the body and having an external thread; a nut mounted to rotate on the body and having an internal thread engaged with the external thread of the jaws; a sleeve having an inner wall which cooperates with the nut so as to rotate it with respect to the body and thus move the jaws between a tool-clamping position and a released position; radial locking means which can be actuated by a rotation of the sleeve so that, when they are in a locked position, they inhibit rotation of the nut with respect to the body when the jaws are in the clamping position; axial locking means which can be actuated by an axial movement of the sleeve and are intended, when they are in a locked position, to prevent the radial locking means from being actuated, wherein the chuck additionally comprises sequencing means designed to prevent the axial locking means from passing into the locked position while the radial locking means are not in the locked position.