IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0800356
(1997-02-14)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
McAndrews, Held & Malloy, Ltd.
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인용정보 |
피인용 횟수 :
24 인용 특허 :
0 |
초록
▼
An insert for a poke-through fitting, including a plurality of sealing elements adapted to absorb heat, expand, and flow into openings under pressure, and a plurality of insulating elements adapted to absorb heat, cure, cross-link, emit water, and dissipate heat, upon activation by heat and flame fr
An insert for a poke-through fitting, including a plurality of sealing elements adapted to absorb heat, expand, and flow into openings under pressure, and a plurality of insulating elements adapted to absorb heat, cure, cross-link, emit water, and dissipate heat, upon activation by heat and flame from a fire. The sealing and insulating elements are adapted to enable the fire rating of the floor in which the poke-through fitting is installed to be substantially the same with or without the hole and fitting therein, to enable the hole in the floor to be smaller to reduce the hazard of transmission of heat and flame from a fire therethrough, and to enable the capacity for passing wires to be greater in the smaller hole for increased wire capacity. The insert further includes a retaining element, assisted by compressible sealing elements, adapted to enable the insert to be retained in the hole in the floor, and, upon the exertion of increased pulling force, to be held fast in the hole in the floor, to prevent the safety hazard of electrical shock and fire from exposed live ends of pulled-apart power wires.
대표청구항
▼
[ I claim:] [1.] A poke-through service fitting, adapted to be installed in a nominally two-inch diameter opening formed at a selected location in a fire-rated floor, for enabling source service cables, positioned below the floor, to pass through the fitting, for activation of devices adapted to be
[ I claim:] [1.] A poke-through service fitting, adapted to be installed in a nominally two-inch diameter opening formed at a selected location in a fire-rated floor, for enabling source service cables, positioned below the floor, to pass through the fitting, for activation of devices adapted to be operable by connection to the fitting, and further adapted to retard the transmission of heat and flame from a fire from a floor below through the floor opening and fitting and to the floor, for enabling the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein, and which fitting further provides a substantial volume for passing the source service cables therethrough, comprising(a) a service head;(b) an insert, for activation by source service cables, adapted to be positioned in the floor opening, including a raceway for passing the source service cables therethrough;(c) means for retarding the transmission of heat and flame from a fire through the floor opening and the fitting to the floor, adapted to enable the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein, and adapted to be positioned in the insert, comprising means for sealing the floor opening and service cables upon activation by heat and flame from a fire, adapted, in non-activated condition, to provide openings about the insert and the service cables upon inserting the insert in the floor opening, and to absorb heat, expand, and flow into the openings about the insert and about the service cables upon activation by heat and flame from a fire, and means for dissipating heat upon activation by heat and flame from a fire, positioned adjacent the sealing means, adapted to enable increased expansion of the sealing means upon activation by heat and flame from a fire;(d) means for connecting the service head to the insert; and(e) means for resisting pulling of the fitting out of the floor opening, adapted to be positioned in the insert,comprising a ring-shaped generally planar retainer, having an opening through which the source service cables are adapted to pass, including a plurality of tabs projecting from an outer periphery at a generally acute outer angle relative to an outer peripheral plane of the retainer, adapted to grip a wall of the floor opening upon insertion of the insert into the floor opening, and upon exertion of increased pulling force on the insert, to resist pulling of the fitting out of the floor opening, comprised of flexible resilient spring material, further comprising means for stabilizing the heat dissipating means, comprising a plurality of fins, extending generally parallel to a longitudinal axis of the insert, radiating in the longitudinal direction at spaced apart locations on an outer surface of the heat dissipating means, adapted to abut the sealing means.
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