Patent ID: 7654404

Claim:
A motor drive system, comprising: an enclosure including a top, a bottom, a plurality of sides extending vertically from the top to the bottom and defining an interior, the plurality of sides including a front side with inner and outer faces and a rectangular opening comprising four edges and providing access to the interior of the enclosure; a motor drive located within the interior of the enclosure and operative to receive power from an external power source and to operate an external electric motor; a protective door system operatively coupled with the enclosure for selectively covering and uncovering the opening, the door system comprising an inner door having front and rear faces, a top, a bottom, and two sides, and a closure mechanism operatively coupled to the inner door and pivotally connected to the enclosure proximate an edge of the opening for pivotal movement between a closed position in which the inner door is positioned inside the interior and an open position in which at least a portion of the inner door is pivoted through the opening to extend at least partially outside the enclosure, the closure mechanism comprising an externally mounted handle movable with the closure mechanism in the closed position between first and second handle positions, the closure mechanism positioning the inner door in the first handle position such that portions of the front face of the inner door face or abut portions of the inner face of the enclosure front side along three of the four edges of the opening to inhibit outward movement of the inner door, the closure mechanism in the closed position operable as the handle is moved from the first handle position to the second handle position to translate the inner door away from the inner face of the enclosure front side and to translate the inner door laterally and vertically such that the front face of the inner door faces the inner face of the enclosure front side along only one edge of the opening to allow a portion of the inner door to pivot through the opening to extend at least partially outside the enclosure as the closure mechanism is pivoted from the closed position to the open position.