EXTENDABLE SLEEVE FOR POURED CONCRETE DECK

摘要

A tubular passage for poured concrete decks has an intumescent tube held in a two-part, clamshell base by a bottom clip. A first tube engages the base's top to clamp a funnel shaped, diaphragm seal to the base. The first tube has spaced, radially extending, parallel ridges at predetermined distances from the base. Longitudinal channels separate the ridges. An extension tube has inward extending lugs passing along the channels to engage various ridges when rotated to fix the passage length. The extension engages the base bottom for corrugated deck supports. A cap with repositionable, locating filaments closes either tube.

主权项

1. An assembly forming a tubular passage for poured concrete decks formed on a support surface, comprising:
a base having a cylindrical sidewall with an upper end and an opposing bottom end and extending along a longitudinal axis, the upper end of the sidewall having an inward extending upper flange defining a circular opening, the lower end of the base having an outward extending base flange to support the base on the support surface during use; an tubular cylinder of intumescent material fitting inside and adjacent to the sidewall and restrained from movement in a first direction along the longitudinal axis by the upper flange, the tubular cylinder of intumescent material encircling the longitudinal axis; a retaining clip having an annular portion at the bottom of the tubular cylinder of intumescent material to restrain the tubular cylinder of intumescent material from movement in a second direction along the longitudinal axis, the retaining clip having a plurality of tabs extending through the sidewall to restrain movement of the retaining clip along the longitudinal axis during use; and a flexible diaphragm seal having an outer periphery engaging an upper end of the base and having an inner periphery defining an opening encircling the longitudinal axis during use, a portion of the diaphragm adjacent the inner periphery having a funnel shape extending out of a plane orthogonal to the longitudinal axis through the outer periphery.