Patent ID: 11931875
Assignee: DUBOIS ET CIE S.A.A
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. An hydraulic tool for performing work on a workpiece, the hydraulic tool comprising:
a tool body extending longitudinally along a tool axis to a free end;
a hydraulic cylinder, the hydraulic cylinder including a main piston movable inside the hydraulic cylinder under the effect of an injection of pressurised fluid into an interior of the cylinder;
a quick coupling system arranged at the free end of the tool body and comprising:
an actuation unit; and
a locking unit movable by the actuation unit between a released position and a locked position to secure the exchangeable head to the tool body, and the locking unit comprises a first half-ring and a second half-ring radially movable between the released position and the locked position; and
an exchangeable tool head comprising:
a functional part adapted to apply a force to the workpiece; and
an interface part for coupling with the tool body via the quick coupling system, and the interface part comprises:
a circular groove adapted to receive the locking unit;
a chamfer for facilitating the insertion of the head within the power tool; and
a recess for partly receiving the main piston; and
wherein the quick coupling system is removably connectable to the circular groove of the exchangeable head, such that when in the locked position of the locking unit, the exchangeable head is secured to the tool body with the half rings extending inside the circular groove, and in the released position, the exchangeable head can be removed from the tool body; and
wherein in the locked position the locking unit is adapted to secure the exchangeable head to the tool body, such that transmission forces can be exchanged between the exchangeable head and the main piston, and
wherein in the released position the locking unit is adapted to release any force applied to the exchangeable head in order to remove the exchangeable head.