Patent ID: 8434266

Claim:
A retrofit conversion kit having component parts capable of being assembled in the field at a swinging door installation for mounting a generally moisture intolerant door operating apparatus together with an automatic door control and operating system as a unit in a sub-floor stratum beneath a threshold area of the door, the door having a door arm at the bottom thereof by which the door is swung open and closed, the kit comprising: a spindle engaging the door operating apparatus within an enclosure and passing through a first hole of said enclosure to engage the door arm both for providing vertical support to the door and for transmitting torque from the door operating apparatus to the door; said enclosure for containing the door operating apparatus and automatic door control and operating system unit, said enclosure comprising: a lower portion made of a moisture impervious material, said lower portion housing the door operating apparatus and automatic door control and operating system, said lower portion of the enclosure being anchored within the sub-floor stratum; and an upper portion which is attachable to and detachable from said lower portion, said upper portion of the enclosure having said first hole therethrough and the upper portion is detachable from said lower portion, while the door arm remains engaged with the spindle, to allow configured to enable external access to the door operating apparatus and automatic door controlling and operating system when said enclosure is mounted in a sub-floor stratum; and a reusable sealing system comprising: a first sealing ring mounted in said first hole and forming a moisture tight seal with said enclosure, said first sealing ring providing both passage of said spindle through said first hole and rotational freedom of said spindle within said first hole while simultaneously forming the moisture tight seal between said spindle and said first sealing ring, said first sealing ring also providing lateral support between said enclosure and said spindle; a gasket positioned between said upper and lower portions of said enclosure for making a moisture tight seal therebetween when said upper and lower portions of said enclosure are attached to one another; wherein said upper portion of said enclosure is comprised of at least two parts, a first part being reattachably removable to provide access to an inside of said lower portion while a second part remains attached to said lower portion, wherein said first hole is partially in said first part and partially in said second part, said first sealing ring being mounted to both said first part and said second part when both upper portion parts are mounted to said lower portion.