Patent ID: 9673595
Date: 2017-06-06
CPC Classifications: G06F,H02B

Claim:
1. A withdrawable contactor truck for a circuit breaker, comprising: a cradle comprising a front wall, right and left sidewalls attached to the front wall, the front wall, the back wall and the right and left sidewalls have a height dimension that is about 1.5 inches; a motorized drive system comprising an electric motor in the cradle, wherein the electric motor has a body with a height dimension that is under the height dimension of the cradle, wherein the motorized drive system moves the contactor truck in a path between a withdrawn position and a levering-in position in a circuit breaker, wherein the electric motor resides a distance away from a front of the cradle, separated by and attached to a gear box which drives a laterally extending belt or linkage to turn a longitudinally extending drive screw of the motorized drive system, wherein the longitudinally extending drive screw extends in a front to back direction of the cradle, orthogonal to the front wall of the cradle, wherein the laterally extending belt or linkage extends parallel to the front wall of the cradle, and wherein the drive screw extends in a horizontal orientation along a longitudinally extending centerline of the cradle; and a plurality of external wheels attached to the cradle, at least two of the wheels adjacent the right sidewall and at least two of the wheels adjacent the left sidewall, wherein the wheels have a center of rotation closer to a bottom of the right and left sidewalls than a top of the right and left sidewalls, and wherein an outer diameter of a top of the wheels reside below the top of the right and left sidewalls while an outer diameter of a bottom of the wheels reside adjacent and below the bottom of the right and left sidewalls.