Patent ID: 7497705

Claim:
A lockout device for an electrical plug having at least first and second prongs including corresponding first and second transverse apertures, the device comprising: a body including at least a first slot disposed on a first end of the body, the first slot being sized to receive the first prong of the electrical plug; and a retaining member disposed within the body and movable between a prong retaining position and a prong releasing position, the retaining member comprising: a prong engaging portion configured to engage at least one of the first and second prongs when the first prong is inserted in the first slot for movement of the retaining member from the prong releasing position to the prong retaining position; and a prong retaining portion configured to be in an extended position when the retaining member is in the prong retaining position, such that the prong retaining portion extends through the first transverse aperture when the first prong is inserted in the first slot, the prong retaining portion being further configured to be axially moved within the body to a retracted position when the retaining member is moved to the prong releasing position, such that the prong retaining portion withdraws from the first transverse aperture when the first prong is pulled from the first slot.