Patent ID: 7440259

Claim:
A closure device for a withdrawable rack adapted for receiving a power circuit breaker, said closure device comprising: a plate arrangement including at least two plates having openings and movable relative to one another so that the plate arrangement is changeable between an open position in which the openings of the plates are in alignment and a closed position in which the openings are out of alignment; and an actuating mechanism acted upon by the power circuit breaker as it is inserted to cause a movement of at least one of the plates to thereby change the plate arrangement between the closed and open positions, said actuating mechanism comprising two V-shaped linkage assemblies, each linkage assembly having two legs connected by a hinge to allow the linkage assembly to spread apart, wherein one of the legs has a free end which is connected to the at least one of the plates, a coupler connected to the hinge, and an actuating element articulated to the coupler of one of the linkage assemblies and to the coupler of the other one of the linkage assemblies.