Patent ID: 8383970

Claim:
A switchgear system comprising: a frame including interior sidewalls defining an interior space, a rail structure comprising: a base coupled to at least one of the interior sidewalls, a first member extending from the base into the interior space, the first member having an upwardly facing surface and a second surface extending generally transversely with respect to the upwardly facing surface so as to oppose a surface of the base, and a second member extending from the base into the interior space, the second member having a downwardly facing surface spaced from the upwardly facing surface so as to define a wheel receiving channel there-between, and a circuit breaker truck including exterior sidewalls with at least one wheel being mounted to at least one of the exterior sidewalls, the wheel being received in the wheel receiving channel so as to be slidable along the upwardly facing surface, with the upwardly and downwardly facing surfaces being constructed and arranged under certain conditions to directly contact a rolling surface of the at least one wheel, thereby limiting movement of the circuit breaker truck about the horizontal axis thereof and the surface of the base and the second surface of the first member limiting movement of the circuit breaker truck about the vertical axis thereof.