| 摘要 |
<p>TITLE OF THE INVENTION: "A FIRE-RATED FEED-THROUGH FITTING FOR TRANSFERRING INSULATED WIRES THROUGH A CONCRETE FLOOR" A fire-rated feed-through fitting for transferring insulated wires through an opening formed in a concrete floor for connection to receptacles mounted on a compartmentalized head assembly, which includes a feed-through assembly disposed in the floor opening and non-rigidly coupled to the head assembly, and a retaining clamp for securing the fitting to the floor. The fitting includes a floor cup for storing excess slack wire, a conduit formed of at least one section, and at least one intumescent fire insulating barrier disposed between the floor cup and the conduit. The retaining clamp includes a collar portion slidably and rotably disposed on the feed-through conduit, and fastening screws for securing the collar portion to the conduit. Retractable arm portions are slidably mounted on the collar portion to enable utility of the fitting with floor openings of minimum size. The retractable arm portions include threaded fastening screws which are independently adjustable to engage a floor bottom face surface and thereby clamp the fitting of the invention to the floor by means of the floor cup and the retaining clamp.</p> |
