Patent ID: 7750766

Claim:
An automatic single-or multi-pole circuit breaker for use in low-voltage applications comprising: at least a first fixed contact suitable for coupling/uncoupling with a first moving contact; an operating mechanism operatively connected to said moving contact, said circuit breaker comprising a kinematic tripping device operatively connected to said moving contact and comprising an operative member suitable for activating said operating mechanism, said kinematic tripping device being driven by a first separating movement of said moving contact away from said fixed contact and activating said operating mechanism, which consequently acts on said moving contact, determining a second rapid separating movement of said moving contact away from said fixed contact, wherein said automatic circuit breaker comprises a moving part, which contains at least a part of said moving contact and a trip shaft, the movement of which activates said operating mechanism, said trip shaft being driven directly by means of the movement of said operative member of said kinematic tripping device, wherein said operative member consists of a sliding rod, which has a first operative extremity for moving said trip shaft and a second operative extremity, wherein said moving part includes a first seat for slidingly containing said sliding rod, wherein said moving contact includes a second seat, in which the second operative extremity of said sliding rod is slidingly inserted.