초록 ▼

This invention relates to structural devices which include intumescent material for the purpose of inhibiting the flow of heated air, smoke, and other products of extraordinary heat conditions, as in the case of a fire, from flowing therethrough. In one embodiment, useful as a tray for supporting in

This invention relates to structural devices which include intumescent material for the purpose of inhibiting the flow of heated air, smoke, and other products of extraordinary heat conditions, as in the case of a fire, from flowing therethrough. In one embodiment, useful as a tray for supporting insulated electrical conductors, a structure with double floor members spaced apart from each other, has convection holes in both of the floor members. The holes in one of the members are out of alignment with the holes in the other, and the top surface of the lower floor member has intumescent material positioned thereon. Thereby, upon exposure of the lower floor member to the heat of a fire for example, the intumescent material will expand, causing either or both the holes and the passageways that are described by the space between the holes of one floor member and those of the other floor member, to become blocked, thereby preventing the passage of heat, smoke and flame therethrough, to localize the fire, and deter consequent damage to the cables being held in the tray.

대표청구항 ▼

A ventilating structure for permitting free air circulation therethrough under ordinary ambient temperature conditions and for shielding objects on one side thereof from smoke, heat and flame originating on the opposite side thereof under extraordinary ambient temperature conditions, wherein: said s

A ventilating structure for permitting free air circulation therethrough under ordinary ambient temperature conditions and for shielding objects on one side thereof from smoke, heat and flame originating on the opposite side thereof under extraordinary ambient temperature conditions, wherein: said structure has an overall flat plate-like configuration characterized by an overall surface area significantly greater than the cross-section area thereof; said structure comprising a pair of wall portions each defining a surface of said plate-like structure; each of said wall portions having a plurality of closely spaced ventilating openings therethrough distributed substantially uniformly over the surface of said wall portions and dimensioned such that the total area of said openings is a significant portion of the overall area defined by each such wall portion, while the area of any one opening is substantially less than a significant portion of the overall area of such wall portion; said wall portions being closely positioned in substantially parallel spaced-apart relationship so that the ventilating openings in one of said wall portions are not in alignment with the ventilating openings in the other of said wall portions, for defining a space therebetween through which air may flow freely in through the ventilating openings in said one wall portion and out through the openings in the said other wall portion under ordinary ambient temperature conditions; and intumescent material positioned in the space between said wall portions distributed substantially uniformly throughout the length and width of said space and located so as to permit free flow of air through said structure under ordinary ambient temperature conditions, for obstructing the flow of air through said structure upon said material being activated into intumescent char under extraordinary ambient temperature conditions.