Patent ID: 8434268

Claim:
A method for retrofit mounting, within a sub-floor stratum, a powering apparatus for a swinging door, at least a portion of the apparatus being intolerant to moisture, the apparatus comprising a mechanism for providing torque, a control mechanism, and a spindle coupled to the torque mechanism, the method comprising: mounting a lower portion of an enclosure within the sub-floor stratum; installing the powering apparatus within the enclosure lower portion with the spindle projecting upward; mounting an upper portion of the enclosure to the lower portion with a gasket therebetween with a securing means, the enclosure thereby being moisture tight when the upper portion and the lower portion are mutually attached; engaging the spindle with the door, the spindle projecting upward through an opening in the upper portion of the enclosure; sealing the opening in the upper portion of the enclosure through which the spindle passes to permit free rotation of the spindle within the opening as powered by the torque mechanism, the opening being thereby moisture tight; and removing the upper portion from the lower portion while the door is attached to the spindle.